Question about 1994 Oldsmobile Cutlass Ciera

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Fuel pressure regulator

How to adjust fuel pressure

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  • Oldsmobile Master
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You can't,you will have to replace fuel pressure regulator or fuel pump,also replace fuel filter,remember to relieve fuel pressure first.

Posted on Apr 28, 2013

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Where is fuel pump relay on 2009 gmc acadia


Your vehicle has no fuel pump relay . Has a fuel pump flow control module .
Fuel Pump Flow Control Module (FPCM)
The fuel pump flow control module (FPCM) is a serviceable GMLAN module. The FPCM receives the desired fuel pressure message from the engine control module (ECM) and controls the fuel pump located within the fuel tank to achieve the desired fuel pressure. The FPCM sends a PWM signal to the fuel pump, and pump speed is changed by varying the duty cycle of this signal.
Plus it has two fuel pumps !
The high pressure fuel pump (9) is a mechanical one cylinder design driven by an eccentric on the exhaust camshaft (1) of bank 2. High pressure fuel is regulated by the fuel rail pressure (FRP) regulator, which is a part of the high pressure fuel pump. The FRP regulator is a magnetic actuator which controls the inlet valve of the high pressure pump. The ECM provides battery voltage on the actuator high circuit and ground on the actuator low reference circuit. Both circuits are controlled by the ECM. When the ECM deactivates the FRP regulator, both circuits are disabled and the inlet valve is held open with spring pressure. When the ECM activates the FRP regulator, the low circuit driver connects the low reference circuit to ground and the high circuit driver pulse-width modulates (PWM) the high circuit. The ECM uses the camshaft and crankshaft position sensor inputs to synchronize the FRP regulator with the position of the eccentric on the camshaft. The ECM regulates fuel pressure by adjusting the portion of each pump stroke that provides fuel to the rail. The high pressure fuel pump also contains an integrated pressure relief valve.
Your best bet is have it towed to the dealer , you don't want to mess with the high pressure pump .
Pluse

Feb 27, 2016 | 2009 GMC Acadia SLT-2

1 Answer

2011 KIA Sorrento 2.4 were is the fuel pressure regulator located. put on adjustable fuel reg .need to disconnect stock one


fuel pressure regulators are normally located in the fuel manifold. They are either vacuum controlled or electronic controlled to maintain the right fuel pressure for engine requirements and to shut off the fuel pump when the ignition is turned off
If your manually adjusted unit will not do all that then you are asking for fault codes to appear and all sorts of problems to occur

Jan 18, 2016 | Kia Cars & Trucks

1 Answer

1995 ford escort keeps burning up fuel pumps they get hot and quit I put a air tech pump in bosch in I replaced filter now a relay and fuel pressure regulator if its got one is the next step any ideas


Sounds like a bad pressure regulator. The regulator is suppose to adjust the pump speed to match demand. Some units work by counting the RPM with a crankshaft sensor. Check fuel pressure at test port. Sometimes the pressure needs to be adjusted when changing a pump.

Jul 27, 2014 | 1995 Ford Escort

1 Answer

Fuel pressure regulator


It is normally in the fuel manifold rail ( at the ends or the middle) . It will have a hose from it back to the tank. IT is normally a tin made item and is sometimes adjustable but most are pre-set. It may even have a wire or two coming out of it for the pressure sensor.

Feb 01, 2014 | 2005 Cadillac Escalade

1 Answer

I have a 96 Acura 2.5TL an a screw fell out of the center of my fuel pressure regulatior valve when I took the plastic cap off it. Can anyone tell me what that screw is for an can it be the reason my car...


That screw is probably the pressure regulator adjustment screw, this screw is to adjust fuel pressure. Regulating fuel pressure is very important in newer engines. Suggest going to shop good with fuel pressure problems. Not easy fix for a DIY.

May 22, 2012 | 1996 Acura TL Series

2 Answers

Fuel Pump Is In Gas Tank. Vehicle Starts Running Poorly...


First, I have never seen an S-10 Blazer that is carbureted and equipped with an in-tank fuel pump and a fuel pressure regulator. Are you sure you are not talking about a throttle body injected engine?

Then, even if such a vehicle does exist, it would make sense to me that the pump is either capable of producing the pressure or it is not. If it adjusts to where you want it, it would make sense to me that the pump is doing what it is supposed to do. Adjusting the regulator would not cause the pump to pump more. It would only affect how much of what the pump is pushing gets returned to the tank. On the other hand, a hole in a regulator diaphram that keeps getting larger could easilly cause the symptoms you are describing.

Apr 14, 2012 | Chevrolet Blazer Cars & Trucks

1 Answer

91 Ford Ranger 4X4, 4.0,AT. When the ambient temperature is is below 75 degrees it runs good. When the outside ambient temperature is above 75 degrees it begins to misfire at freeway speeds. If you...


Hello, There should be a sensor in the air snorkel and if it is sprayed with a choke or brake cleaner it is probably unreliable. This part can be cleaned with Electronics spray. The sensor measures the incoming Air temperature and makes engine adjustments based on temperature.

You can get a free scan at Autozone, Advance, or Oreilys autoparts stores. There are some malfunctions which will not set a Code and yours is temperature sensitive, so the scanner will have to catch it at the right temperature.

Looking at the thresholds you have given, there are a few other possibilities. If you look at hard acceleration, manifold pressure drops and you are saying the engine runs smoother with less manifold pressure. Could be a bad MAP sensor. Then looking at temperatures above 75 degrees, pressure in the fuel tank increases and the Evaporative Emissions system must adjust to capture the gas vapors. If the Evaporator solenoid is misfiring you may be feeling it cut-out. You have replaced the fuel pressure regulator, but has the regulator been adjusted? Some systems use a Relay to help the pressure regulator buffer the constant changes in demand to the fuel pump. The Relay could be bad making it seem that the pressure regulator was bad when it actually was not.

Check with one of the above 3 autoparts places for info on this Relay and if your model has it. I hope my solution is very helpful and that your problem is a less expensive part.

Aug 19, 2011 | Ford Ranger Cars & Trucks

1 Answer

I have a 87 mustang thats getting to much fuel


if carburetor check carb float level if injected it could need the fuel pressure regulator adjusted you may need an after market fuel pressure regulator even with a carb especially if its not the stock fuel pump

Feb 25, 2011 | 1987 Ford Mustang

1 Answer

I need to replace de fuel presurre sensor in a pontiac montana ,do i have to just replace the sensor ,o the sensor came with the fuel pump?thank you


Replacing the fuel pressure regulator, involves just replacing the regulator at the end of the fuel rail in the engine compartment, but fuel pressure sensor - does this mini-van have a fuel pressure sensor?
replacing the fuel pressure regulator: (1) locate it at the end of the fuel rail in the engine compartment,
(2) relieve fuel system pressure (3) disconnect fuel pressure regulator vacuum line. (4) remove fuel pressure regulator retaining screw (retain for re-use (5) using a shop towel to catch spilled fuel, lift & twist Fuel pressure regulator to remove it from the fuel rail. (6) remove/discard retainer and spacer bracket from the fuel rail. (7) remove fuel pressure regulator from the engine fuel return pipe. (8) remove/discard Fuel Pressure Regulator inlet O-ring (9) Check Fuel Pressure Regulator filter screen for contamination - if contaminated, replace Fuel Pressure Regulator. (10) Lubricate new Fuel Pressure Regulator inlet O-ring with clean engine oil & install onto the Fuel Pressure Regulator inlet. (11) Install the fuel return pipe onto the Fuel Pressure regulator (12) Install new retainer & spacer bracket into the slot on the fuel rail.
(13) Install Fuel Pressure Regulator onto Fuel Rail & tighten Engine Fuel Return Pipe nut to 13 ft-lbs (17 Nm). (14) connect Fuel Pressure Regulator vacuum line, (15) Install Fuel Pressure Regulator attachng screw & tighten to 76 in-lbs (8.5 Nm). (16) Inspect & verify that retainer & spacer bracket is engaged in the slots on the fuel rail. Grasp & pull on the Fuel Pressure Regulator.
to ensure that the Fuel Pressure Regulator is properly seated. (17) inspect for fuel leaks with this
procedure: On 2sec,(holy rollers), off 10sec will be left on, inspect for leaks while running.

Dec 11, 2010 | 2000 Pontiac Montana

2 Answers

Adjusting fuel pump


If you have the 91 3.1 V6 Rodeo you can't adjust the fuel pump or fuel pressure. The only thing you can really do is to get a throttle body rebuild kit that will have a new diaphragm for the fuel pressure regulator. If you want to adjust it, you'll have to get an aftermarket regulator and install on the return line (the smaller line) and remove the spring out of the regulator on the throttle body. If you feel the fuel pressure is too low, then you might need to change the pump. Its located in the fuel tank, only takes 1 or 2 hours to do.

Jul 12, 2009 | 1991 Isuzu Rodeo

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