3800 supercharged fuel pressure regulator. Aug 19, 2011 · more is not better.

• 3800 supercharged fuel pressure regulator Generally speaking, if there's a pump "flow back" problem, the issue is in the pump itself or the fuel pressure regulator is leaking back thru the return line to tank. I am assuming it is vacuum related, there is a strong vacuum when car is running but when I shut the car off, give it some time and check the lines there is no vacuum pressure built up. To do its function, the regulator received a vacuum line from the intake manifold. The fuel pressure on these engines should be 56 to 62 psi with the key on and engine off. The regulator is located at the end of the fuel rail’s circuit. If there is, it's bad. One night I overfilled the tank due to the evap issue and started it Oct 19, 2017 · I have a 1993 LeSabre Limited with a 3800 Series I. 8L 3800 v6 engine. Apr 9, 2008 · On a Series III 3800 engine in a Buick Lucerne, the returnless EFI system has the fuel pressure regulator mounted in the fuel tank with the pump instead of on the fuel rail. Apr 21, 2018 · The fuel pump itself has a check valve to prevent fuel flow back for the pressure line coming out of the pump assy. Apr 14, 2010 · The fuel pressure regulator controlls the fuel pressure the motor gets, so the higher psi pump would not matter on what the motor gets. I discovered the fuel leaking from the far left injector which caused fuel to pool in all the rear injector ports. I checked the pressure regulator and it appears good. Fuel pressure regulator is dry and in good working order. The fuel pump relay and fuel pump hi-speed relay. I have an external fuel pressure regulator set at 45lbs and the stock pressure regulator in the fuel rail. I tried to eliminate the stock regulator but the car is harder to start with out it. There is no fuel return line from the engine back to the tank. I circled the fuel pressure regulator in red. Recently I have been experiencing poor acceleration and an intermittent rough idle. Remove the snap ring (7). replaced vent vale, canister, fuel pump & filter. 3" pulley, 160 drilled stat,Walbro 255 Fuel Pump The Fuel pressure regulator regulates the fuel pressure in the fuel rail by selectively metering some of the fuel back to the fuel tank by way of the fuel return line. I had a mechanic test it, and say it had low fuel pressure, which is why the fuel pump was replaced, he said it had the right pressure after that, I am not sure I believe him. Vacuum is good and constant. Idle Air Control Motor Apr 1, 2008 · On a Series III 3800 engine in a Buick Lucerne, the returnless EFI system has the fuel pressure regulator mounted in the fuel tank with the pump instead of on the fuel rail. This fuel rail system completely overhauls the stock 3800 fuel rail system. if it does, either the injectors are leaking, or the fuel pump is going out. Using a shop towel to catch any spilled fuel; lift and twist the fuel pressure regulator in order to remove the fuel pressure regulator (6) from the fuel pressure regulator housing (1). The difference below is adding custom fuel rails and a fuel pressure regulator. Nov 28, 2013 · Picked up the fuel pressure gauge and the vacuum gauge. Remove the small regulator O-ring (2). Hey guys, I'm currently doing a set of Lower Intake Manifold Gaskets on my 3800 Series 2 Supercharged engine. I have replaced the following: Fuel Pump, Sending Unit, Trans Vacuum Modulator, Mass Airflow Sensor, Fuel Pressure Regulator, Intake Manifold Gaskets, Spark Apr 3, 2012 · """on certain passenger vehicles equipped with 3800 v6 (l36) engines and certain delphi fuel pressure regulators, the regulators have a much higher than usual rate of fuel leaks. Symptoms vary but primarily the engine will start but die in a matter of seconds due to insufficient fuel pressure. check fuel pressure, it should be 52 psi with vacuum removed from regulator, and it should hold and not drop more than 5 psi in 10 minutes. Jan 7, 2021 · So this is how the vacuum lines are connected. Cover the fuel pressure regulator housing (1) to prevent . Drove fine with it for a while, the replaced vent valve still had issues opening and closing. There are two relays that control the fuel pump via the PCM module. " Citation: posted from attached PDF on GM Superchargers Apr 1, 2008 · On a Series III 3800 engine in a Buick Lucerne, the returnless EFI system has the fuel pressure regulator mounted in the fuel tank with the pump instead of on the fuel rail. Sep 27, 2019 · I started the car and it ran fairly smooth but the fuel pressure was fluctuating between 30-50lbs while I was trying to adjust the regulator the car stalled. Tied into the hi-speed relay is a fuel pump resistor that may go bad. If your fuel pressure is actually higher, then your motor will run rich and need to be leaned. NOTE: The stock Fuel rails will have a hard time keeping up with high power fuel demand. a leak can allow fuel to enter the intake manifold through a vacuum line. Aug 19, 2010 · Under high vacuum low load conditions, if not bypassed the pumping pulses result in supercharger gear rattle. That's the reason I say check your fuel pressure regulator. I also checked it after the engine was shut off, no fuel and no smell of fuel. May 2, 2012 · The L67 GTP has a two speed fuel pump. my car ran worse the higher the pressure was turned up, and ran the best with less pressure. Remove the vacuum hose from the fuel pressure regulator and tap on the hose and regulator to see if an gas comes out. Inlet vacuum and manifold pressure are used to open and close the bypass valve as needed. Fuel pressure regulator 2. Nov 12, 2021 · My fuel pressure while running is around 48psi, drops quickly after shutting off. 12-04-2010, 08:25 PM #6 The 3800 was introduced after the 3. Is that appropriate to it 3800 Supercharged Pressure Regulator Line. Oct 20, 2024 · Hello Everybody, I have a 3800 series 2 supercharged and it had an evap issue. The fuel-injected, 3800 V6 has a fuel-pressure regulator mounted on the fuel rail. The three split off the top of the supercharger goes big one to the connector at firewall. Aug 19, 2011 · more is not better. This is an internal part of the fuel pump unit. The 3800 was introduced after the 3. 8L and uses a balance shaft to enhance engine smoothness. Can I attach this line to a vacuum/pressure on the lower intake manifold? This is the same place my boost gauge is connected, so the fuel pressure regulator would see vacuum and pressure. Jun 10, 2011 · I replaced the fuel pump, CKP, TPS, cleaned the IAC, MAF, replaced the ICM, and a failed coil pack, and just found out I have 6 wet/fouled plugs. Pull off the vacuum line and see if there's fuel in the line. 1. The MAF sensor reads the airflow and tells the PCM how much air is coming Sep 27, 2019 · I started the car and it ran fairly smooth but the fuel pressure was fluctuating between 30-50lbs while I was trying to adjust the regulator the car stalled. put the car on a lift and seen no leaks nor damaged lines and the fuel rail was very loose i tightened that down and the car pulled a little harder but it started to cut out on the high side of the RPMs I had replaced the fuel pressure regulator about 4 Sep 23, 2004 · On many boosted cars fuel pressure needs to be raised as boost is added to compensate for extra air. The 3800 FWD supercharged engines use several methods to control fueling, which render an AFPR worthless in many cases. Oct 3, 2010 · Someone on here said it was the fuel pressure regulator adaptor. I cleaned the fuel off the manifold and let it dry for several hours. It seems to hold the pressue in the rail longer with the stock one in place. 8 rockers, slp headers, northstar throttle body, Z06 MAF,3. . The fuel pressure regulator has a vacuum line. Swapping out the Supercharger on my 3800 SC. If so, then you have the classic fuel pressure regulator failure. If you plan on modding, just get fuel rails/logs and run an adjustable fuel pressure regulator. Mar 3, 2013 · Negative trims mean the computer is REMOVING fuel. Regal, L67 3800 Supercharged Performance Products, Mods and Tunes. I pulled the vacuum line and let it run for about 5 minutes, and no fuel leaked out. -----Fuel rails, hoses, regulator, and fittings-----NOTE: See build 1 fuel diagram and parts. Remove the regulator O-rings (4,5). Performance Jul 28, 2015 · 2002 Camaro SS 1986 Fiero GT 3800SC 4T65E-HD slp 1. Exact location may vary depending on vehicle year / make / model. It was attached directly to the old SC, but my new SC has no provision to attach it there. One little one goes to the top of the bypass plunger then to the actuator then the other side of the actuator to the t on the top of the fuel pressure regulator. Click sensor description below image for sensor details. Jun 21, 2012 · I have a supercharged 3800 engine that looses fuel pressure when I excelerate. The bypass valve is operated by a vacuum/pressure actuator. Typical engine data sensor and control component locations on the GM 3. The 3800 is not unique to any single General Motors brand; it is found in all GM offerings: Chevrolet, Buick, Pontiac, Oldsmobile and Cadillac. Welcome to PRJ. It's much more difficult to have too much fuel than to have too much air. Please consider making a small Tip/Donation. Fuel pressure is low at 20 PSI. 3800 V6 Engine Sensor Locations. I broke the vacuum tube that connects to the fuel pressure regulator, and I can't find a replacement anywhere for the life of me! Dec 17, 2017 · Replaced the fuel pump , fuel filter , ran injector cleaner and im still at 37-39 PSI. wtzo lruiauc cyxui ehwmb bmcpbu qrtsp pkneh xfebkqi frroo wckdz rkmz pvv ynntel iqqtr lym