Question about 1992 Volvo 740

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Fuel pressure is to high, 100psi, after pressure regulator. Regulator has been replaced

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That only leaves 1 item in the loop that can cause this. The Fuel pump itself. Replace the in tank fuel pump.

Posted on Nov 05, 2010

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99 tahoe turns over but wont start. Pulled spark plug and grounded to see spark; this is successful. Fuel pressure at 58. I'm stumped


I think that fuel pressure may be too high - the injectors work over a vary narrow pressure range. The regulator output may be blocked, or the pressure may just be too high for the injectors. I would start by replacing the regulator.

Apr 19, 2018 | 1999 Chevrolet Tahoe

1 Answer

Error code 2501, 2502 & 2504. Fuel pressure too high. What action should I take to rectify or check to resolve this please.


the only thing that controls the fuel pressure is the fuel pressure regulator
some are vacuum controlled , some electronic controlled
make sure that the return hose is correctly fitted , and that the regulator control is correctly hooked up
or if old regulator then replace it

Mar 11, 2016 | 2004 Volvo XC90

1 Answer

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

What does it mean when no fuel comes out of the fuel pressure regulator but there is fuel in the fuel rail?


fit a fuel pressure gauge and flow meter in the fuel line if the pressure is low replace the pump,if the flow is low replace the fuel filter, if the fuel pressure is high replace the fuel rail pressure regulator.

Jan 03, 2016 | Cars & Trucks

1 Answer

SYSTEM WONT BLEED


diesel engines high pressure pumps not suppose run dry.diesel fuel keep high pressure pump cool and lubricated.problem could be fuel pressure regulator in the fuel filter water separator housing.replace fuel filter see if it helps problem could be fuel pressure regulator in fuel filter housing, the fuel pressure regulator has a air bleed orifice that allows vent to the fuel tank.make sure fuel pump fuse okay pump getting power. i would let garage or dealership check it out if all fails because your diesel engine fuel timing is pcm controlled if let fuel system go dry you probably have to have fuel injection timing reset or could have damage high pressure pump letting it run dry i hope thats not the case because high pressure pump not cheap part i hope it not that.

Sep 17, 2012 | 2008 Ford F-350 Super Duty

1 Answer

How to take off a fuel pressure regulator on a 2000 ford excursion


bleed off pressure by disconnecting wiring from inertia switch or pull fuse for the pump, start engine till it stalls. pressure will be zero.
pressure regulator is on fuel rail. They seldom go. If you are losing pressure overnight or low pressure ( below 40 psi), it is likely the check valve in the fuel pump in the tank.

Pressure Regulator -Fuel 4.6L 4V Removal
syj~us~en~file=ani_caut.gif~gen~ref.gif WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel-related components. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in personal injury.
syj~us~en~file=ani_caut.gif~gen~ref.gif WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before working on or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved. Failure to follow these instructions may result in personal injury.
  1. Relieve the fuel pressure. For additional information, refer to Section 310-00 .
  1. Remove the upper intake manifold. (BIG JOB). For additional information, refer to Section 303-01B .
  1. Remove the fuel pressure regulator (9C968).
    1. Disconnect the fuel pressure regulator vacuum hose.
    1. Remove the snap ring.
    1. Remove the fuel pressure regulator.
  1. Remove and discard the fuel pressure regulator O-ring seals.
Installation
  1. syj~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Use O-ring seals that are made of special fuel resistant material. Use of ordinary O-ring seals can cause the fuel system to leak. Do not reuse O-ring seals.
    NOTE: Lubricate the new O-ring seals with clean Super Premium SAE 5W-30 Motor Oil XO-5W30-QSP or equivalent meeting Ford specification WSS-M2C153-G, to aid installation.
    To install, reverse the removal procedure.
---------------------------------------------------------------------------------------
Pressure Regulator -Fuel 4.6L 2V, 4.6L 2 Valve Removal
syj~us~en~file=ani_caut.gif~gen~ref.gif WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related components. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in personal injury.
syj~us~en~file=ani_caut.gif~gen~ref.gif WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before working on or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved. Failure to follow these instructions may result in personal injury.
  1. Relieve the fuel pressure. For additional information, refer to Section 310-00 .
  1. Remove the fuel pressure regulator.
    1. Disconnect the vacuum hose.
    1. Remove the snap ring.
    1. Remove the fuel pressure regulator.
  1. Remove and discard the fuel pressure regulator O-ring seals.
Installation
  1. syj~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Use O-ring seals that are made of special fuel resistant material. Use of ordinary O-ring seals can cause the fuel system to leak. Do not reuse the O-ring seals.
    NOTE: Lubricate the new O-ring seals with clean Super Premium SAE 5W-30 Motor Oil XO-5W30-QSP or equivalent meeting Ford specification WSS-M2C153-G, to aid installation.
    To install, reverse the removal procedure.

Jun 10, 2011 | 2000 Ford Excursion

1 Answer

Why is oil in the breather hose?


Thats not oil more than likely its fuel and that would mean that the diaphram in the fuel pressure regulator is leaking.Pull the vacuum hose off the regulator and look for fuel if any runs out of it then replace the fuel pressure regulator.If regulator is leaking it will usally cause the engine idle high.

May 24, 2011 | 1992 Oldsmobile Cutlass Supreme

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

1 Answer

Overreving with no power and excessive gas consumption air filter cleaned map sensor replaced fuel pump and filter


usually caused by busted diaphram in fuel pressure regulator allowing fuel to be drawn thru regulator directly to intake manifold. Pull vacuum line off regulator, plug line with golf tee, start car and watch to see if gas comes out of regulator. If yes, turn off car, replace regulator. The regulator sits near the fuel rail on the top of the engine as shown below. I will paste replacement instructions below from autozone.com in case you need to replace the regulator. Please let me know if you have any questions.
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Removal & Installation

4.2L Engine

  1. Relieve the fuel system pressure.
  2. Remove the air cleaner outlet resonator.
  3. Disconnect the engine wiring harness from the retaining clips at the front of the engine.
  4. Disconnect the fuel pressure regulator vacuum line.
  5. Clean any dirt from the fuel pressure regulator and the surrounding area.
  6. Disconnect the fuel return pipe.
  7. Remove the fuel return pipe retainer.
  8. Remove the fuel pressure regulator retainer.
  9. Remove the fuel pressure regulator.
  10. Inspect the regulator filter screen for contamination. If contaminated, replace the fuel pressure regulator.

To install:
  1. Install the regulator filter.
  2. Install the new O-ring on the fuel pressure regulator.
  3. Lubricate the fuel pressure regulator O-ring with clean engine oil.
  4. Push the fuel pressure regulator into the regulator housing on the fuel rail.
  5. Install the fuel pressure regulator retainer. Tighten the regulator retainer screw to 71 inch lbs. (8 Nm).
  6. Install the fuel return pipe retainer. Tighten the return pipe retainer screw to 71 inch lbs. (8 Nm).
  7. Connect the fuel return pipe.
  8. Connect the fuel pressure regulator vacuum line.
  9. Connect the negative battery cable.
  10. Inspect for leaks:
    1. Turn ON the ignition for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition.
    4. Inspect for fuel leaks.

  11. Install the engine wiring harness into the retaining clips at the front of the engine.
  12. Install the air intake resonator.

Dec 08, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

How do i check the fuel pressure regulator on a 1995 ford taurus


got to your local auto parts store and tell them you need a fuel pressure gauge for up to 100psi, it will connect to a valve stem looking something like the one on a rim, it located on the fuel rail on top of engine, usually chrome going to 3 injectors one each side, pressure should be around 50-60 lbs, if lower replace pump

Oct 14, 2010 | Ford Taurus Cars & Trucks

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