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How do you replace the fuel pressure regulator on a 5.7 liter engine

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Where is the fuel pressure regulator located on a 1988 Dodge B-150 van, 5.2 liter? I've been told it's on the fuel rail. Where is the fuel rail?

If you have throttle-body fuel injection, you don't have a fuel rail. The fuel pressure regulator should be mounted to throttle body.


Dec 13, 2016 | Dodge Cars & Trucks

2 Answers

Where is the fuel pump regulator on a 2007 chrysler town & country 3.3 liter engine

Be sure to release the fuel pressure prior to removing the Pressure Regulator.
Fuel Pressure Regulator is under this clamp.

Sep 17, 2014 | Chrysler Town & Country Cars & Trucks

2 Answers

Fuel pressure 1998 jeep grand cherokee 4.0 L V6

You should have a test port on the Fuel Supply rail, use a tool from a local auto parts "Tool Loaner program" where you can borrow tools for free,w/a deposit of course,then follow the steps provided;

MPI Fuel System Pressure Test

The MPI fuel system used in vehicles equipped with a 4.OL engine employs a vacuum balanced pressure regulator. Fuel pressure should be approximately 55-69 kPa (8-10 psi) lower with the vacuum line attached to the regulator than with the vacuum line disconnected. System fuel should be 214 kPa (31 psi) with the vacuum line connected to the regulator and 269 kPa (39 psi) with the vacuum line disconnected. CAUTION: Some fuel may be discharged when connecting fuel gauge to fuel rail.
  1. Connect a 0-414 kPa (0-60 psi) fuel pressure gauge to test port pressure fitting on fuel rail (Fig. 7).
  2. Remove vacuum line from pressure regulator.
  3. Start the vehicle.
  4. Note gauge reading. With vacuum line disconnected, fuel pressure should be approximately 269 kPa (39 psi).
  5. Connect vacuum line to pressure regulator. Note gauge reading. Fuel pressure should be approximately 214 kPa (31 psi).
  6. If fuel pressure is not approximately 55-69 kPa (8-10 psi) higher with vacuum line removed from regulator, inspect pressure regulator vacuum line for leaks, kinks or blockage. CAUTION: Fuel pressure will rise to as much as 655 kPa (95 psi) when the fuel return tine is pinched shut, shut engine down immediately after pinching oft fuel return line.
  7. If fuel pressure is low, momentarily pinch shut the hose section of the fuel return line. If fuel pressure remains low, inspect the fuel supply line, fuel filter, and fuel rail inlet for blockage. If fuel pressure rises replace fuel pressure regulator.
  8. If fuel pressure is above specifications, inspect the fuel return line for kinks and blockage.

Capacity Test

  1. Remove the cap from the pressure test port in the fuel rail.
  2. Connect a 0-414 kPa (0-60 psi) fuel pressure gauge to the pressure fitting on the fuel rail (Fig. 7).
  3. Start the vehicle. Pressure should be approxi- mately 214 kPa (31 psi) with the vacuum hose connected to the pressure regulator and 269 kPa (39 psi) with the vacuum hose removed from the pressure regulator.
  4. If the pressure is not to specification, check the following before replacing the fuel pressure regulator:
  • 4a - Inspect the fuel supply and return lines/hoses for kinks or restricting bends
  • 4b - Check the fuel pump flow rate. A good fuel pump will deliver at least 1 liter of fuel per minute with the fuel return line pinched off. If the fuel pump does not pump adequately, then inspect the fuel system for a plugged fuel filter or fuel pump inlet filter (sock). Fuel pump flow rate can be done by connecting one end of an old A/C gauge hose to the fuel test port on the fuel rail and inserting the other end of the hose into a container of at least 1 liter capacity. Run the fuel pump by installing a jumper wire into diagnostic connector terminals D1-5 and D1-6. Be sure to pinch off the fuel return line or most of the fuel will be returned to the fuel tank.

May 19, 2014 | 1996 Jeep Grand Cherokee

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

It burns to much gas when its in park i give it gas and black smoke comes out the muffler

Check the fuel pressure regulator. On the 3.1 liter it's in the middle of the engine between rails. On the 3.4 it's at the end of the rail. pull the vacuum hose off, plug the hose with a golf tee, start the car, and see if gas comes out of the vacuum port on the regulator. If yes, replace regulator. If no, check fuel pressure at schrader valve on rail. Pressure should be 41-47 psi. If higher, replace regulator. Let me know if you have questions.

3.1 liter:

3.4 liter


Nov 17, 2010 | 1995 Oldsmobile Cutlass Supreme

2 Answers

Have 1998 safari 4.6 throttle body cannot find fuel pressure regulator

Astro, Safari 1997-2005

Fuel Pressure Regulator - Removal & Installation
  1. Disconnect the negative battery cable.
  2. Relieve the fuel system pressure. Refer to the fuel system relief procedure in this section.
  3. Remove the upper manifold assembly.
  4. Remove the fuel pressure regulator vacuum tube.
  5. Disassemble the fuel pressure regulator snapring retainer.
  6. Remove the fuel pressure regulator assembly and the O-rings. Discard the O-rings, filter and back-up O-rings.

    Fig. The fuel pressure regulator is retained by this clip

    Fig. Replace the O-rings whenever the fuel pressure regulator is removed
To install:
  1. Lubricate the O-rings with clean engine oil and install as an assembly.
  2. Install the fuel pressure regulator, attach the vacuum tube.
  3. Install the snapring retainer.
  4. Install the upper manifold assembly.
  5. Connect the negative battery cable.

  1. Relieve the fuel system pressure.
  2. Remove the upper intake manifold assembly.
  3. Remove the fuel pressure regulator retainer clip (5).
  4. Pull and twist the fuel pressure regulator (6) in order to remove the fuel pressure regulator from the fuel pressure regulator housing using a shop towel to catch any spilled fuel.
  5. Remove the regulator seal lower O-ring (3).
  6. Remove the regulator assembly filter (2).
  7. Remove the regulator seal upper O-ring (1).
  8. Remove the regulator seal backup ring (7).
  9. Discard the O-rings.

    Fig. Exploded view of throttle body assembly (click for zoom)
To install:

NOTE If the fuel pressure regulator is to be reinstalled, inspect the filter screen for contamination. If the filter screen is contaminated, replace the regulator.
  1. Lubricate the new O-rings with clean engine oil.
  2. Install the regulator seal backup ring (7).
  3. Install the regulator seal upper O-ring (1).
  4. Install the regulator assembly filter (2).
  5. Install the regulator seal lower O-ring (3).
  6. Assemble the regulator (6) with the vacuum tube pointing down into the regulator retainer clip.
  7. Install the fuel pressure regulator retainer clip (5).
  8. Install the upper manifold assembly.
  9. Connect the negative battery cable.
  10. Inspect for leaks.
    1. Turn the ignition ON , with the engine OFF , for 2 seconds.
    2. Turn the ignition OFF for 10 seconds.
    3. Turn the ignition ON , with the engine OFF .
    4. Inspect for fuel leaks.
  11. Install the engine cover.

Hope helps with this (remember comment and rated this).

Aug 05, 2010 | GMC Safari Cars & Trucks

3 Answers

Where is the fuel relay located in Mazda mx6 1988?

On that one it actually called circuit opening relay under left side of dash in fuse relay box


Feb 08, 2010 | 1988 Mazda MX-6

3 Answers

1998 Chevy tahoe Hard to start when cold

replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Feb 17, 2009 | 1999 Chevrolet C/K 2500

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