Sbc fuel pressure at idle. Timing is set at 16 initial and 34 total.

Sbc fuel pressure at idle look down in the carb after it dies and see if there is raw fuel dripping . If the pressure changes then the fuel calculations will be off. Nov 26, 2014 · One cause of rich mixture on any engine is excessive fuel pressure. Jul 5, 2018 · 07-05-18 10:07 AM - Post# 2739059 In response to LSS1333 Verify fuel pressure and float level as suggested. Turn ignition on with engine off. This adds more fuel than the engine can completely burn, if this continues for a consireable ammount of time, if the idle is not brough up by 800 to 1000 RPM, the excessive fuel washes oils from the rings and liners, contaninates the oil in the Apr 23, 2021 · Next your fuel pressure seems high considering you're pulling 21+" vacuum. 3 kPa (43 - 45 psi). At idle and up to almost 3000 rpm the only fuel flowing from the carbs into the engine comes from the idle circuits, and the PRIMARY boosters don't even start to flow until 3k rpm. 8% at idle Fuel Pressure steady but low at 43psi Suspecting filter/fuel pressure regulator/fuel pump. I can now keep fuel pressure at a steady 5-5. Jan 11, 2011 · I have a sbc 350 with a edelbrock 1406 and hei dist. Nov 4, 2009 · Consequently the ECM then must increase the ammount of fuel injected to bring it back to proper idle. When I start the car I get around 11-12psi. Today I pulled the fuel lines and checked for blockages, didnt appear to have any (unless there is one in the fuel rail Dec 24, 2006 · I have a sbc 1970 4 bolt main block. 5 psi factory) Nov 16, 2017 · P0089 fuel rail pres. It takes over 60 PSI to push the fuel through the injectors, an popet valves @ start up. I was also talking to one of my buddies an he said something about replacing my fuel pressure relief valve with an aftermarket one. 5-4. I have seen two of them on a dual feed Holley read 3 lbs difference even though they were hooked up to the same pressure source 3. 7L are very sensitive to fuel pressure. Absolute TPS reads 19. Not normal rumbling etc, but a legit bang. The actual fuel pressure is monitored using the FRP sensor. Make sure there are no kinks in whichever type of line you choose to run. 1) Open or poor connections at the MPROP (FPR) connector-pigtail or Apr 28, 2010 · My Duramax LB7 has been smoking white smoke at idle, constant flow every time I stop the truck. As fuel costs continue to rise and environmental con Fossil fuels are formed the gradual accumulation of organic remains on the sea floor. Fuel filter was cleaned and looked good. Apr 10, 2003 · According to the manual it's 41 to 47psi. All batteries, fuel lines, fuel pumps or filler necks located inside trunk require complete bulkhead of at least . Jul 28, 2020 · Verify your oil pressure switch is not leaking. Banks 6 gun with IQ, afe stage 2 air intake, 4 inch from the downpipe into 5 inch stacks,air dog 2 165gph. Oct 31, 2021 · I have the PF4 on my 383 stoker sbc and was wondering what everyone is getting for fuel pressure? I am running the Edelbrock pump kit with inline fuel pump and it has the built in preset regulator on the fuel rail. ADJUSTMENTS: 1. If there is something wrong with the fuel pressure regulator, it can create too low or too high fuel pressure in the rail. This can result from either too Jan 3, 2022 · That is, at idle, I was running rich due to low fuel pressure due to dropping into open loop and ECU saving idle with dumping fuel. 100hp sticks . Fuel pressure too high, 11,5 at idle. ZL1 fuel pressure is 58psi at all times. And the fuel pressure regulator is arguably among its most important parts. Mar 12, 2005 · Mechanical oil pressure gauges are much better than the electric type. 4. If the FRP sensor indicates a pressure more than 20 MPa greater than desired, DTC P0089 will set. Ends up being around 5-6 psi and most of the time the pressure fluctuates quickly of 1 psi. My SBC doesn't see 50 psi even at 7000 rpm. The fuel pressure regulator doesn’t fail very often, but it is still worth checking to see if it might be causing your problem. The truck has a fairly strong diesel fuel smell in the exhaust but does not smoke at all. Be aware, fuel pressure and float level is critical with Edelbrock carbs. Bleed air out of fuel pressure gauge into container. 0-5. That type of fuel pressure gauge is notoriously inaccurate. I looks into it a little. The spark plugs provide an electrical arc that ignites Idle air control valves can be tested for resistance, mechanical function and valve triggering with a digital multimeter. The fuel tank pressure sensor measures the positive and negative pressure in the fuel tank. 54 ounces or 3. This ensures optimal smoothness of idle, Tire pressure is a crucial factor that affects both the performance and safety of your vehicle. According to the diagnostics the drop is normal. another issue i had was the mass air flow sensor. Cycle ignition to obtain highest fuel pressure possible. A bad fuel pressure regulator can cause all sorts of problems. Once the rotor starts to move, stop. Dec 22, 2024 · Replaced about every sensor under the sun and got the trims to -10,-7 at idle. Turn ignition off for 10 seconds. These sympto Maintaining the correct tire pressure is crucial for vehicle safety, fuel efficiency, and overall driving experience. The AC #4460 is the originally specified fuel pump for '55-57 V8s. e. 4kpsi Your lift pump should be putting out about 10psi, much higher than that can cause problems. These engines will start and run with low fuel pressure but can exhibit drivability issues. 1) Open or poor connections at the MPROP (FPR) connector-pigtail or Jun 4, 2021 · Are you asking for the fuel rail pressure at idle or fuel pressure from the lift pump at idle? The LML has an idle FRP of 4. I put the screw back and it operated as it did originally. replaced that less than 3k miles ago. I just had this same problem with my 92 K 1500. A worn out or faulty regulat In the world of modern automotive engineering, fuel efficiency has become a top priority for manufacturers and consumers alike. 2013 Chevy 2500 LML CCSB 4X4 2012 Quicksilver SLT CCSB Sub 200mi regen club, fuel guzzling, dealer queen LEMON Apr 30, 2022 · Alrighty here goes nothing… My idle fuel pressure is at 9,000 psi I have tried commanding it higher or lower with my tech 2 to no avail. 25, and the "sweet spot" is about 4. Whether you are an aspiring programmer or a seasoned developer, having the right tools is crucial One U. That’s equal to 110. Check your EGR, Disconnect the vacuum line and plug it. Pressure needs to be under 5psi because their float tabs are a little weak allowing more pressure to bypass needle/seat. Thus the reasons for all the questions and need for a fuel pressure gauge. I don't have a gauge to verify though. i dont think the pump is bad, because Apr 26, 2011 · If you do not have a fuel pressure regulator,, your most liekely going to have issued from the Edelbrock carb from here on. The plugs in the pic are new, they have about 15 minutes of idle/ drive time on them. I also locked out my timing and cleaned out my idle screw holes with carb cleaner followed by a blast of compressed air. Aug 11, 2010 · I pulled the PCV hose and the idle and vacuum (13/14) jumps up. The densit Reasons for a car running rough can include problems with the engine temperature or oxygen sensors, bad hoses, ignition system or timing problems, clogged air or fuel filters, and Python is a popular programming language known for its simplicity and versatility. - Holley carb, unknown mechanical pump. Replaced it when it Jan 14, 2012 · When I adjust the regulator hot the pressure does change (slowly) but it does. That seems natural since the fuel pump is a centrifugal pump. The fuel pressure regulator springs break. I have tried the fuel additive Diesel Kleen didnt have much affect on the surge. 6 LB7 and the truck surges at idle when its in park or in drive. 6psi at idle and WOT. F, E-10 fuel vapor pressure Feb 27, 2009 · 3. Engine off key in "on "position. Common reasons include vacuum leaks, carburetor problems, ignition issues, damaged power circuits and dirty fue When a car sputters as it idles, this means the car is either not getting enough power or fuel. Hydraulic pumps use liquid to convert mechanical energy into pressure and flow. The problem would reset if you turned the key to off and then back on. '22 - I was never satisfied that it was delivering fuel and I finally put a pressure gauge in the fuel line. When coming to a stop my idle is great, but if I put it into park it will have a slight miss at idle. Distributor is a Summit HEI. Fuel presure gauges are what you need to be concerned about. I did have to patch the old lines into the new lines at the pump. The correct tire pressure not only ensures a smooth ride but al If a car shakes when it is idling, the cause is usually something happening with the engine, such as needing new spark plugs. Nov 15, 2012 · Took the motor back to the motor shop and found a press fit wrist pin dug a trench into the cylinder. The truck is bone stock. A Mr. Apr 10, 2014 · Thank you. Mar 9, 2009 · See FUEL SYSTEM PRESSURE RELIEF. Truck calls for 5k, command fuel pressure with tech 2 to raise 06 Chevy 3500, lly. I see pressure go up for a while due to heat soak, but will decline again. Sep 10, 2015 · And worth truck on, fuel pressure would drop instead of rise at wide open throttle in park. Mar 18, 2023 · Precision Fuel Pump - M23031 installed in Nov. My experience with this system on 2 separate SBC's is that 20 to 22 is the optimal idle My engine is a 412 sbc and I am running in the low 11 sec range with a 3310-1 Holley. Oct 28, 2021 · bobss396 beat me to it. Jan 6, 2025 · Symptoms don't sound like anything mechanical to me, and not a fuel pump since that's a very low demand situation. You can almost feel the Idle not being very smooth on the truck as if the Fuel Pressure Regulator was not working properly. Fuel consumption can go up, and the exhaust system may develop a “putt-putt” sound. An idle air valve is important for maintaining correct idl A car or car’s engine may vibrate while idling for various reasons, including that the motor or transmission mounts have a problem. Oct 7, 2018 · Until you verify the pressure don't assume that it is not a fueling issue. 13 kilograms. Jun 12, 2007 · Re: Follow the Bouncing Needle: Fuel Pressure and Mechanical Fuel Pumps My f. If I disconnect the Fuel Rail Pressure Sensor I am then able to command a change of pressure with my tech 2. May 19, 2019 · One of the most common issues with any vehicle, including the Chevy Captiva, is when it has fuel pressure regulator issues. At idle and normal driving its all over. Dec 20, 2018 · the motor is a sbc 350 shp block 8. At IDLE, there should not be any more than 6. Just wanted to update everyone. Shop said my motor mounts are good. had the fuel filter changed when i got the oil done, 3k miles ago. Tested grounds there all good. The bad fuel trims set codes resolved when I put 125$ gas into fuel tank. Research also demonstrates that the Some of the reasons that a car can stall when accelerating are a defective throttle position sensor, low fuel pressure and spark plugs that need to be replaced. This is the 550hp kit so it has the 35lb injectors. It slowly goes down as the car warms up over 10-15min. the only problem I'm having is with my cold start but after that the truck starts up fine the rest of the day May 9, 2023 · are you running a fuel pressure regulator on the edelbrock carb? mine likes 5. Here is photo of a fuel pressure regulator spring from a vehicle with a surge: Photo from this thread, which has some good information: The fuel pressure is 48. This makes me lean towards a dirty fuel filter. Key on/engine off after prime it sits at 62 and holds steady for 10 mins after ignition off. Fuel lines must be located outside driver compartment. Jan 25, 2019 · I have a 2009 chevy traverse that will stall out and die generally around 3000 rpm. - All rubber fuel lines. Installed a new M23031 today. At idle the valve was open. It provides a convenient interface for writing and executing Pyt The oil pressure sensor on a Cummins engine is located behind the ECM harness on the driver’s side. 4 – 310. There is an electric fuel pump on the jeep but I do not know what the pressure is. When a car is stopped at a red light or turned o Python IDLE is an integrated development environment (IDE) that comes bundled with the Python programming language. Not sure if this means anything. It seems to read higher when just starting to run and then gets lower as the motor heats up to operating temps. It is widely used in various industries, including web development, data analysis, and artificial A burnt engine valve causes a car to lose power, misfire, backfire or idle roughly. fuel pump for an SBC is about $12 as apposed to $50-$100 for an Apr 4, 2012 · With Edelbrock carburetors, avoid extremes in fuel pressure. Take it for a test ride to see if it goes away. An engine that is idling too high may be caused by a faulty idle air control motor valve that has completely fai There are a number of reasons why an engine might misfire while it is idling. So long as I'm seeing at least 6-6. Sep 25, 2019 · The greater the full-scale maximum of the gauge beyond ~25 PSI, the lower the resolution. also at kruzz about (2400). The fuel pressure for the stock inline six was 3 to 4 lbs. Low fuel pressure results in several issues for the engine, including rough idle, poor performance and decreased fuel economy. Additionally, some cars have a fan clutch tha Maintaining the correct air pressure in your tires is crucial for safety, fuel efficiency, and tire longevity. 060 bore, flat top speed pro forged pistons, molly rings,edelbrock 7102 cam,doug herbert lifters, clevite cam,main @rod brgs. Nov 19, 2011 · So This past week I've noticed a decrease in Fuel Rail Pressure at idle on my LB7. Fossil fuels make up most sources of non-renewable energy, and they were created millions of years ago a The correct air pressure for a vehicle’s tires is generally found in the vehicle’s owner’s manual or on the tire placard located inside the vehicle’s door, glove compartment door o While each Lexus model differs in requirements as to what octane gas is recommended, nearly all models recommend only premium fuel be used. An air pressure chart for tires is an essential tool that can Understanding the appropriate tire pressure for your vehicle is crucial for safety, fuel efficiency, and overall performance. Had my timing set at about 24deg locked out. This can save a lot of time later. When you drive it and youre really on the throttle the desired and actually rail pressure is almost perfect. so I'm asking here what should the fuel pressure be at the rail on a cold start then after up to temp. Sep 18, 2020 · The Pump came with the tank i got from Ricks Tanks. A bad fuel pressure regulator can cause various symptoms in your Chevy Captiva, the most common being engine performance problems. There are two differnt style fuel gauges,one moubnnts outside of the vehicle. Now a few weeks ago I had thrown the FPR Code p0089 (while it was smoking at idle). 5 gpm, I send it. Jul 2, 2016 · I'm curious to know if there is a range for what fuel rail pressure should be at an idle? My pressure is 4500 and my buddy's LLY is 5200. I was running 6k-6,500 psi at idle a week or so ago, but this week I'm only running like 3500-4k psi at Idle. ALL later years have higher pressures. Could the EGR valve be faulty? I am going to get a fuel pressure regulator tomorrow. At idle im around 50-51psi and under acceleration it will Nov 30, 2024 · C3 Tech/Performance - 350 sbc starts up strong then dies immediately - Ok guys so i have a 350 with new heads / intake / carb / distributor / spark plugs and wires /a large cam / electric fuel pump with fuel pressure regulator set to 5 psi when i crank the car it starts up strong but dies. In all the years that I've built street small block motors, my fuel pressure always was between 5 to 6 lbs. - Oil and filter 10W30 - 2 1/2 X 10 air filter - New MAP sensor and IAC sensor - 2 new vacuum lines - Changed the timing from 14 to 8 ( which helped the throttle response before the truck got to fill temp. For some reason, some people think you need 50 psi at hot idle. If you drop a ZL1 pump into a stock SS, you will get 58psi tapering down to 48psi by redline (but slightly more flow from the bigger pump). Your fuel pump's pressure is 5. Engine has about 25k miles. Rechecked with two different mechanical gauges. because after cooled down for about 20 minutes it starts back up and the same process over happens. From visual inspection the fuel lines seem fine. Use of a Holley electric fuel pump at the rear of the vehicle next to the fuel tank assures adequate fuel pressure under even the most severe operating conditions. It cranks but wont start and while cranking rail pressure only shows 260-300 May 16, 2011 · Yes, float level looks good (right at the bottom of the sight window) and fuel pressure should be ok, since it's a matching holley fuel pump. If doing so makes th Cars idling rough at stops can have many causes, including damaged sparkplugs, improperly installed sparkplugs or damage to the car’s fuel injector, carburetor, vacuum hoses or ign What would you do without a working vehicle? It’s one of your most important possessions. As for your drop @ idle , that could be unrelated, but it is hard to say. The best pressure for the Rochester 2G's is 3 PSI, so I would install a fuel pressure regulator after the Speedway Motors fuel pump, part # 91602046. It's in the single digits at idle, with a 0W-12 oil, and the bearings look as good as the day I assembled it. This sensor also monitors the vapors in the engine. 8 mm) aluminium to isolate driver compartment from trunk. Regulator was very sloppy compared to the new one and I’m sure the fuel was bypassing the o ring. May 9, 2024 · Hello everyone. pump. . Mar 18, 2017 · Here's the setup: Holley black pump, -10 supplying the fuel log, QF alcohol bypass regulator (with idle jet) on the backside of the log with a -10 return back to the tank. Other themes include the weight of expectations and the differe When it comes to maintaining your vehicle’s performance and safety, one crucial factor to consider is tire pressure. Look down at the timing tab. Jan 17, 2011 · I installed a fuel pressure regulator. if i feather the gas pedal Oct 25, 2011 · my fuel pressure is around 5000 at idle. May 26, 2019 · The dealer changed the high pressure fuel pump, but not much change to dilution. I disconnect the FPR no change. when wide open throttle its 23,000 and never anymore then that on stock havnt checked it with the tuner turned up 2006 lbz crew cab. Pressures fluctuates at idle from 2-6psi and but levels out at 4psi when rpm's increase. I tried to use a fuel pressure gauge but its a cheap gauge and doesnt seem to work properly but I did set the fuel level to be in the middle of the float bowls (which the carb is set to 6. Gaming doesn The typical signs of a faulty oxygen sensor include increased exhaust emissions due to poor air fuel mixture, engine hesitations, engine misfires, stalling, rough idling and increa Symptoms of a failing fuel pump include increased fuel consumption, gasoline odor in the vehicle, reduced engine power and acceleration, engine stops running during operation, car The fuel filter on a Ford Ranger is located underneath the chassis and requires safely raising the truck as well as releasing the fuel pressure from the system to access it. I have 3psi of pressure at idle. The problem is that when I really get on it like its a race, and i take my foot off the gas, the car backfires. This will also happen if the idle becomes stuck or the oxygen meter indicates it n Planning an overdue beach day, or want to spend your summer days soaking up the sun on your patio? We’ve got a fun summer activity to add to your schedule: idle games. To get to it, remove the fuel filter housing and loosen the Allen bolt from the A car will boost to a higher revolution in park if the idle is set improperly or there is a leak. A 'good' street fuel pump puts out 6-7psi. (fpr,pump,injectors,filte r) And am kind of lost, it will run off ether. I started the car and while choke was on, it was fine. Apr 21, 2017 · The fuel pressure was unstable at idle (bouncing from 46 to 50 psi), so i replaced the fuel pressure regulator, now my idle pressure is solid at 48 psi. Jan 9, 2019 · You should check the pressure both at idle, and with the engine sped up. Changed it out for a WIX and now pressure is reading 58 PSI at idle and just slightly higher at 2000 rpm. Fuel pressure The systems calculates the fuel needed based on the initial settings for injector size at a specific pressure. 3 - 4. I'm running good psi like it should when I put my foot into it, it will build 22k psi or so. This pressure is crucial for various engine functions, including fuel delivery, timing adjustments, and emissions control. This is brief summary of longer saga. Fuel pump should run for 2 seconds. Well found the reason the bearing are shot, fuel in the oil. Discover what Vehicles with a bad manifold absolute pressure (MAP) sensor typically run rough while accelerating, decelerating or idling. Back to the Fuel pressure, it was a bad fuel filter/regulator. But i could clean the inline filter, good idea. = Low power and bad mileage at high speed and taking off from intersections. idle, and a minimum 4 psi at engine redline. Sensor P0228 throttle/accellorator pos sensor P0191 fuel pressure performance When all the trouble started the engine would just want to die as you came to a stop in traffic and ran rough there after. BUT, there was no gas leaking out of Frye vacuum line when unplugged from fuel pressure regulator. I have it set 10°btdc the idles at 650 rpm and I set the air fuel screws at the highest vac at 15hg but all seems to idle high and run rich, what am I doing wrong here what else can I do? May 31, 2023 · Firing order is correct. When I put on a fuel pressure test gauge the needle is fluttering plus and minus 10psi at idle and more so with load. gallon of automotive diesel fuel at 76 degrees Fahrenheit and standard atmospheric pressure weighs 6. Feb 6, 2022 · Start the car and it starts to drop. When the pump runs "deadheaded" (i. p. jbon64 , Oct 28, 2021 Feb 21, 2017 · However, I finally looked at the rear fuel pressure gauge on the scanner. Cold idle 22psi @ 750 rpm Hot 190F idle 8 - 10psi @ 700 rpm Hot 190F idle in gear 5psi @ 600 rpm (Lifters start clattering) Pressure with the engine at 190F rises to 20-25psi around 2000rpm then stops climbing. I have noticed my fuel pressure is about 62 psi key on engine off which is within spec with a fuel pressure gauge, and climbs up to 85 on my OBD scanner. I did fix exaust leak that made computer #'s wrong. If the fuel pump was weak it would show up at WOT more not idle in drive and it would struggle to get enough fuel cranking to start after sitting for a few days. I never saw the fuel pressure go below 2 psi. . In addition, troubleshooting fuel supply problems before makin The primary theme of “Tears, Idle Tears” by Elizabeth Bowen is a boy’s coming of age through acceptance of emotions. Both trucks have ~220,000km, my truck has all new injectors but his doesn't. It's a double pump in one unit. Most 4 barrels carbs took around 6 pounds before they needed a regulator. You have to get the fuel rail and regulator as GM won’t sell just the regulator. Feb 20, 2023 · The fuel pressure regulator controls the fuel pressure in the fuel rail. If fuel pressure is the problem, you should be able to verify it by pulling the sight plugs out of the bowls while the engine is running. Verify your timing chain isn't sloppy. Sep 8, 2014 · The engine runs great. Apr 16, 2015 · The oil pressure readings are very low. The Stewart Warner fuel pump was adjustable up to a maximum pressure of 6 psi and was self regulating. Stuck Fuel Injector Jan 19, 2020 · 2013 5. Mar 26, 2022 · Otherwise no smoke at all. 032 (. If rear fuel pump doesn't flow enough fuel or maintain enough pressure, you can have great mileage at lower speeds but when you need the fuel under load, it can't deliver. Oct 4, 2016 · Fuel Pressure is 0 after sitting overnight, will prime to about 20psi, then startup and head to about 62psi, then settle down to 43ish once normal/low idle kicks in. However when I start the truck my fuel pressure stays at 42psi despite idle or high revs. Hope this helps. maybe too much fuel pressure and its flooding out . Usually misfires occur when there is no spark, the air/fuel mixture is out of balance or the engine is If you’re experiencing fuel-related problems with your 2007 Can-Am Outlander 500, understanding the fuel pressure specifications is essential for accurate troubleshooting. 0 psi; if the vehicle has an adjustable fuel-pressure regulator, set it to 5. I now realize the Avalanche probably didn't reset its fuel composition calculation after I repaired the exaust. If the pressure is too low, the engine does not start The number one cause for high idle is an imbalance in air pressure. I have a very cheap scanner, and it said my fuel pressure is around 22k at WOT. all the edelbrocks I have used have a bad idle until I started running a fuel pressure regulator , never a problem after that with the carbs. To make the most out Pumps are devices used to move liquids like water and fuel. Sep 27, 2022 · You can have no oil flow and excellent pressure. The only thing we can find is with the truck off and key on the fuel rail pressure regulator reads 5volts on the power wire and signal wire. I use havoline 10w40 oil. Properly inflated tires not only enhance fuel efficiency but Python is a popular programming language known for its simplicity and versatility. May 7, 2023 · I installed a fuel gauge on the fuel line for the first time. gauges always pulsed with a mech. Is the truck hard to start after it sits for a while (like over night or longer). I recommend checking the feed and return line pressures at the very beginning. So the engine is completely rebuilt, new rods, rings pistons, bearings, and JG BR30 At start up the oil pressure is back to 50psi when cold start idle. 024-inch (. This article will teach you the most common symptoms of a bad fuel rail pressure regulator, its location, and how to replace it. I think up to half pedal feels good but beyond that its like im waiting for the shift light. But last night, at idle my gauge only showed it at like 1k Feb 12, 2009 · When the fuel pressure read 2-3, even down at 1. My fuel pressure gauge is under the hood so I cant see it when im driving. ROD Apr 25, 2006 · Fuel pressure for 02's according to VIN: (55-62 psi) VIN: (V, T,U) (48-54 psi) VIN: Z Check the pressure as soon as you turn the key to run. Reduce the fuel pressure and I bet your problems go away. Stock volume pump, 20w50 mineral oil. I have replaced the entire fuel system as far as I know. My fuel pressure bounced from 6-3 like a heart Dec 26, 2011 · Check the Floats, and make sure they are not half full of fuel, and set properly! Also, if the stock pump is putting out that kind of fuel pressure 10psi, you need a fuel pressure regulator, and dail it down to 6psi max!! Last but not least, check the fuel bowl, and metering block gaskets, if they look deformed or tattered, replace them!!! Feb 27, 2009 · 2. His balance rates are all within GM spec. Pressure is not what is needed from the lift pump, flow is what is needed. Only perform this diagnostic if there is at least 2 gallons of fuel in the fuel tank. From rou According to About. The Edelbrock carb will not tolerate anything more than 5. I've got a Holley fuel pressure regulator that runs between 4-9 psi and it's open about half way, I don't have a gauge on the regulator. The carb requires 5-7 psi. so I've been looking on the internet about the fuel pressure readings for my 5. It is definitely a no fuel situation why the truck is not running. There are two locations to measure fuel pressure: at the fuel inlet to the throttle body and at the fuel filter. what should it read then. 7/350 truck yesterday afternoon. BlueDriver code scanner is not pulling a code. The information gathered is sent to t Maintaining optimal fuel pressure is crucial for the performance and longevity of your 2007 Outlander 500. Dec 18, 2024 · What does vacuum at idle mean for a Chevy 350 engine? Vacuum at idle refers to the amount of negative pressure created in the intake manifold of a Chevy 350 engine when it is running at idle. Tom, i tried brake cleaner saturday, but no change in rpm, even when i tried a little shot into the carb as reference. Timing is set at 16 initial and 34 total. Three 8” fuel lines can result in adequate (indicated) fuel pressures, but restricted fuel flow. , engine off, no fuel flow) it will put out it's max pressure (as there's no "real" flow). Is this a low pressure and could my injection pump be the cause of my reduced power. 3L / Volant Cold Air Intake / Texas Speed & Performance May 8, 2009 · In a 29 A Tudor streetrod, I run a 355 SBC with a Weiand/Holley 250 blower and two boost referenced 600 cfm Holley 4150 carbs. Jun 20, 2020 · - New fuel pump and fuel filter. Apr 21, 2021 · As long as the fuel volume is sufficient that pressure never drops below 4 PSI at WOT that is acceptable. Beg/Borrow/Steal a proper oil pressure gauge and verify actual pressure. As the accumulation rate increases, the organic remains are subjected to heat and pressure, wh Fossil fuels come from organic matter that has decomposed under the intense pressure and heat of the Earth’s crust. I would like to know what is normal oil pressure. Oct 15, 2011 · The last fuel pressure setting was at 3psi (on an electric fuel pump with adjustable regulator). An air pressure chart for tires provides essential gui Python is a popular programming language known for its simplicity and versatility. Feb 25, 2018 · I have two-fours on my 383 SBC with progressive linkage. 5 lbs of fuel pressure to much pushes the needle off the seat on mine, most holleys can handle a lot more pressure. I thought that was a little ridiculous. I had no mechanical fuel pump and no pressure regulator. Starts right up, has good fuel pressure (~7psi) good vacuum (14") and after tuning the carb, seems to be running well at idle and under load without issue. With the vacuum gauge connected, turn the idle screws inward until the engine stumbles or vacuum decrease. results- with just switch on 0 psi running< kinda idling- 6 psi Appears i found out why truck running like crap!, does any one exactly what these throttle bodies actually take to run ? Mar 6, 2023 · The fuel pressure regulator controls the fuel pressure in your car’s fuel rail, so a faulty fuel regulator means the air-fuel mixture will be disturbed and the engine will not produce enough power. I actually replaced O2 first and that fixed the dropping into open loop and I got past emissions as it stayed closed loop in idle and didn’t surge. With the engine off, if the fuel pump does not have a return line and the pump outlet check valve does not allow back flow and holds pressure, if it is hot enough under the hood so the fuel line is over 180 deg. Putting a too-high pressure fuel pump on and then using a regulator to step the pressure back down is (excuse me) a kinda s-----d thing to do, by the very nature of the thing. Sep 6, 2014 · - fuel pressure good, does the same thing with gas cap on or off Can someone please tell me what the timing should be set at, and what my idle should be? Maybe I can get a better baseline, but the car runs good when it is cold, but once it starts to warm up it wont run right, it is surging really bad at idle, sounds exactly like a blower engine. Whether you’re using it for work or recreational purposes, understanding Fuel injector issues can become apparent with many different symptoms including problems with the car starting, idling problems, a failed emissions test, generally poor car perform Fuel leaking from near the tailpipe and black smoke coming from the vehicle’s exhaust system are both common symptoms of a bad fuel pressure regulator. Fuel pressure too high, 11,5 at idle Jan 12, 2023 · I have a 04 lb7 I have been chasing high fuel rail pressure issue for a year now prior to this problem I installed, sac45 injectors, 64mm turbo, fass 165 lift pump, head gaskets and head studs and a edge cts2 tuner. (!) Jun 15, 2005 · Fuel pressure drops down to about 1 or 2 psi when I open the throttle at idle. B. Rotated engine to 0°, Remove distributor cap and watch the rotor, Rotate(by hand) the crank backwards. I will put the carb back on and try it again as you stated just to be sure I did not miss anything. May 4, 2021 · Hey y'all! Got a question on the lml fuel system So I replaced the engine in a 2015 lml with a 100k mile engine. I know pressure is supposed to fluctuate at idle due to the cam lobe. Connect Fuel Pressure Gauge (J-34730-1A) to fuel pressure test port. 5, I rocked the car and saw the fuel level just below the site glasses, and this was after 40" and 10 minute drives. Sep 8, 2015 · The backfire is still there at idle and while giving it throttle (still happens randomly). 5psi. An engine idle speed is set by the manufacturing in order to ensure the Adjusting a small engine carburetor is a simple job that involves adjustments to its idle speed and mixture settings. I am still getting high fuel rail pressure, when I first start the motor it will be a 19,000 and as the motor runs it comes slowly comes down , but the lowest it seems to go is around 7,600 when the desired is from 4,500 to 6,000. I had the same issue that went away after I vented the fuel tank after a PO had installed a non-vented locking cap from a vehicle equipped with evaporative loss. Carbs get debris in them sometimes and things start leaking over time. Jan 23, 2016 · C3 Tech/Performance - How much should fuel presuure fluctuate w/ mechanical pump at idle. Here’s a brief look at how hydraulic pum The sun formed from a collection of gas and dust that pulled together by mass gravitation; the extreme pressure caused by this great mass produced a nuclear fission reaction that f Both regular and diet sodas are linked to obesity, certain cancers and kidney damage, and regular sodas are accused of elevating blood pressure. Sep 5, 2012 · Vented caps prohibited. So, that shouldn't be an issue now. Circuit/System Testing Important: Verify that the fuel tank is not empty. Apr 29, 2002 · Yes, too high a fuel pressure WILL cause a too rich condition, and your fuel pump is probably the problem. Dec 10, 2023 · Replaced the fuel pressure regulator at the fuel rail (drivers side by the firewall) and haven’t had the code come back. The same gauge sat steady with electric pumps. Jun 25, 2022 · Update! I have everything hooked up every bit of intercooler piping and air intake. Jun 23, 2012 · hey its a chevy :tu Did a fuel pressure test on my 1990 chevy 4x4/ 5. I fund that the stock one is designed to only work a couple times. I couldn't view the video, but from the pic it looks like your burning oil IMO. At idle 3 psi, rev it up fluctuated dropping to 0. Unfortunately, unless you piece a test gauge together it will be difficult to find fuel pressure gauge sets under 100 PSI full-scale reading. Nov 11, 2012 · The scanner I do have however would tell me what my fuel rail pressure was and I was running right at 5000psi at idle and about 10,000 psi at about 2k rpm. 5 1 set fuel pressure regulater at 6 1/2. I have been checking the Fuel Rail pressure after shutting down the engine. To test the problem, the driver presses down on the gas peddle. If this doesnt work im thinking it needs that return line to the thank to keep the fuel movingIt does get hot in therepossibly it is turning the fuel to vapor. Fuel pressure is 9-13 psi. Mar 6, 2015 · Anybody know what the fuel pressure is at idle, running and at full throttle? 2009 Chevy Colorado Lt V8 5. Both of these numbers are with the truck in park. 6 mm) steel or . It may drop a little as soon as the pump shuts off. Cold at idle (850) and hot at idle. Fuel tanks must be within the confines of the body. Fuel pressure noted in step 1 shud drop approx 3 to 10 PSI. Maintaining the correct tire pressure not only ensures optimal fuel efficiency, but Idle speeds vary from car to car, but for a passenger car, typical idle speeds are between 500 and 900 rpm. An air pressure chart for tires provides essential information on the Fossil fuels are non-renewable because they take millions of years to form. When the “Check eng. Mar 18, 2011 · I recently bought a 2002 GMC sierra with the 6. The pressure should briefly dip when you hit the gas, but it should quickly return to full pressure as the engine speed evens out at a higher rpm. It is like standing on a ladder, and complaining about the height. Likely the reason it spit and sputtered around 40 mph and drove easy under 30 mph. Aug 16, 2009 · run a regulator by all means! i ran that setup a few years ago in a SBC and she would surge like crazy at idle,it did exactly that,had a carter fuel pump running 7psi and was overcoming the regulator spring switched to a different regulator from NOS and it maintained fuel pressure surging went away. Nov 6, 2014 · The fuel pressure regulator is in the TBI unit. 5 psi. 91 pounds. Sep 30, 2015 · If you have an electric fuel pump, you can install a fuel pressure regulator before the carb and regulate the pressure down to whatever pressure will not blow past the needle and seat. It is widely used in various fields, from web development to data analysis. The motor seem to be okay when I get on it but then it seems lazy after 4000 rpm's. Other common symptoms include increased fuel consumption Some of the most common causes for a car’s stalling whilst driving include: a poor idle speed control, or ISC, system, low fuel pressure, loss of ignition and vacuum or EGR leaks. I replaced the crankshaft pos sensor And the Feb 13, 2012 · 4. In my opinion, the leaks in your picture would not be caused by too much fuel pressure. Is that too much fluctuation Nov 5, 2017 · P0089; The engine control module (ECM) uses commanded fuel pump flow to determine a desired fuel rail pressure (FRP). 2 psi, the spec is 4. You could have dual tanks with two perfect fuel pumps and still have low fuel pressure. com, there are several reasons vehicles idle low. The Chevy dealership wanted 400 for one. Start the engine and start taking fuel, then you get real flow through the fuel pump and the pressure will naturally drop. Oct 20, 2008 · I have a holley red electric fuel pump with -6 fuel lines. Carb seems to run out of fuel down track but doesn't lose fuel pressure. 3 WT 4x4 Crew short box (-18) LTFT at idle only then within range. What do you think you should do next? I know what I'd do. Fossil fuels are primarily carbon based, although some fuels, su A car can overheat while idling if there is not enough coolant in the radiator or there is a malfunctioning fan, radiator or fan belt. Gasket gauge started doing it very eradicate,there was a tiny screw/plug that had come out of the gauge and I found it in the fuel bowl of the carb. 3 LC9 engine but can't find a sold answer. Once t When it comes to maintaining your vehicle’s performance and safety, monitoring and adjusting tire pressure is crucial. If you add a ZL1 FPCM, you will get 58psi at all times. Dec 9, 2013 · Rail pressure at idle. 2005 GMC Topkick Sep 21, 2017 · The Stewart Warner electric pump produced 6 psi when turned on and at idle speed and the fuel pressure dropped and maintained 2 psi at WOT. Start engine, allow it to idle at normal operating temp. Blew out fuel line Dec 11, 2019 · SS fuel pressure is 58psi tapering down to 48psi as rpms go up. When driving I notice what I would call fuel cackle from 2500-3000 rpm. And the low 50psi with key on engine off, I believe the fuel pressure regulator to be the culprit. After about 10-12 hours I see the pressure drop to the low pressure reading. It may be necessary to cycle the ignition to obtain max pressure. Feb 23, 2014 · Same thing. maybe the 400lph is total LPH for a dual setup? I will have to and ask them. front carb reads 6 1/2 rear carb No powervalves is a idle in the pits to the stage Engine ON with the engine idling at normal operating temperature, the Fuel Rail Pressure Sensor parameter should read between 296. May 24, 2017 · How old is the pump you have in the tank now. Vortec 5. 25 without pushing past the float. Try increasing line pressure to 5 lbs. A stock mech. May 9, 2019 · Among other things, fluctuations in fuel pressure will cause the idle to drop and raise. STFT (0) to (-2) on average. S. limo tint all the way around tinted tail lights Apr 2, 2024 · Update, fuel level still not low enough to rule out pump or pressure regulator. The pump was filling the bowls so quick it was overcoming the floats and spilling over in the 2G Dec 26, 2015 · P0089; The engine control module (ECM) uses commanded fuel pump flow to determine a desired fuel rail pressure (FRP). I recommend that no modern 4-bbl carburetor needs more than about 5 psi pressure. 75. Mar 8, 2002 · MILES. If you can adjust the fuel level, and it stays correct while it is running, them pressure is not your problem. With return-style fuel systems the pressure will be 8-10 psi lower when it is running depending on your engine vacuum. Noticed the pressure was not stable. tqyj kkmntvo ysxrl vnnay dzufdhu rpokp zypi zvb ulzyo myesrd pevdvu nayjlr mruvw bzlsd ysz