Question about 2002 Ford F150 Regular Cab

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Where is the fuel pressure regulator located on an 2002 f150 v6?

Fuel pressure is around 30 psi at idle speed and engine trouble light is on.
Computer code P0171-P0174-P1151-P1131 are present.suspect fuel pump or fuel pressure regulator.

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  • adams484 Jan 18, 2009

    I have a similar issue. I have replaced the fuel pump and filter and my fuel pressure is hovering around the minimum spec. It always has and now I am get lean codes on both banks. I have always suspected it but it's location is a well kept secret. The engineers are embarassed at where they located it. I have never been able to lay eyes on it but the lines all converge at the back of the engine. You know, way up under the dashboard. Because there seems to be no mention of a R&R (Remove and Replace) operation in any of the manuals I have I suspect it is a very very disagreeable process.

    Does anyone have a work around for this like a secret panel under the dash or something to get at this piece of engineering marvel. I wouldn't be so critical but I have seen under the hood of a Toyota pickup and know it is possible to create a serviceable vehicle. No wonder the big three are hat in hand in front of Congress! My GMC diesel is even worse. You should see where they have the fuel filter. The most serviced part of a diesel engine!!!

  • artg475 Jan 19, 2009

    I located the puel pressure regulator and replaced it. The FPR is located on the riders side of the engine , on the fuel rail at the fire wall. I put the truck on a jack stand, removed the right front tire and internal cowling and removed a vacuum regulator, mounted on the engine ,to reach it. To remove The FPR a internal compression ring holds it in place. Very difficult to see without a mirror and a little luck.

  • Anonymous Mar 15, 2014

    chevy 2005 fuel pressure regulator location

  • Anonymous Mar 16, 2014

    2002 trans am rail fuel pressure is at 80 psi...what is the pressure spec?

  • Anonymous Mar 18, 2014

    were is this located on this vehcile

  • Anonymous Mar 18, 2014

    were is ths located

  • Anonymous Mar 22, 2014

    cannot find the fuel pressure regulator on 1988 ford f-150, 5.0

  • Anonymous Mar 23, 2014

    i get pressur to my regulator but not past it i put new pump on

  • Anonymous Mar 28, 2014

    Was advised that the fuel pressure regulator was bad

  • Anonymous Mar 28, 2014

    ecl light is on and engine missing



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In the center of the motor,in the rear on the fuel rail

Posted on Jan 19, 2009

  • miller77 Jan 19, 2009

    i'm glad you located what you where lokking for.i'm not a master mechanic but i have been doing it for about 12 years.there is still alot that i would love to learn.right know i am a shadetree mechanic,i am in hopes of my ase certification.


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Is the backside with vacuum hose connected

Posted on Dec 27, 2015

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Usually on the fuel rail were the injuctors plug into and fuel lines plug into.

Posted on Mar 03, 2015

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How to check fuel pressure 91 geo storm gsi

1.6L DOHC (same way as the ISUZU impulse ) same car.
4XE1 engine twin cam.
has MPI injection with fuel rail, regulator and loop
disconnecting the feed line and stuffing it with guage only does 1 of 5 tests. done on MPI. it does JUST the shut test.
the correct way it to check it at the filter or rail tests ports on most cars.
in some cases you must add it.
they sell banjo fittings with test ports at summit racing dot com.
so the first question on all MPI cars, is , where is the stock fittings.
other cars the rail has a schrader valve or a plugged hole to add one. (test port) did you look first for this?
to test the FPR, unplug the vacuum line running
and pressure will jump up 6 to 10 psi.
this simulates wide open throttle pressure, a key fact in getting full power from engine, i test cranking presssure, idle, 3000rpm
and wot pressures to be sure the PFR is working, not just the pump.

the spec at the rail is.

Late 1986 to 1993 I-TEC MPFI system (after VIN 0908197)
Regulator vacuum line connected-36 psi
Regulator vacuum line disconnected-42.5 to 45 psi

the shunt test can hit 60 pis easy. do so for only 5sec.
as this stresses the pump .

the only rail drawing , shows no fittings (cheap buggers)

not even a cheap plug...

24024302-wtht4tipiqsxmsfaksxjx4vs-4-0.jpg below is the twin cam, 1.6L
buy a TEE feeting, and put it at upper, red arrow.
use clamps rated for fuel injection, not chezzy screw band clamps as seen on carb cars. use the correct parts.
or you will get leak and it will not be pretty,
the filter as at 14 ID. this is the pressure feed side of the loop.
30 to 60psi , so all parts must be rated over 60, psi, (100psi is a nice goal)


now the words directly from the IMPULSE FSM.

  1. Relieve the fuel pressure.
  2. Disconnect the fuel line near the engine and install fuel pressure gauge T-connector in the line.
  3. Connect the fuel pressure gauge to the T-connector.
  4. Start the engine and check the fuel pressure, it should be:
  5. 4XC1-Turbo and DOHC I-Mark, G200Z Impulse: 35.6 psi with the vacuum hose of the pressure regulator disconnected and plugged. 28.4 psi with the vacuum hose connected and at idle.
  6. 4ZC1-Turbo, 4ZD1 Impulse and 4ZE1 engine: 42.6 psi with the vacuum hose at the pressure regulator disconnected and plugged. 35.6 psi with the vacuum hose connected at idle. Disconnect the VSV before checking pressure.
  7. V6 engine: 9.13 psi at the fuel pressure line after the fuel filter.
  8. 4XE1 SOHC and DOHC engine: Flow test, disconnect the hose from the EFI fuel feed line at the engine and place in a suitable container. Apply battery voltage to the fuel pump. Pump should supply 1/4 quart (0.24L) within 15 seconds. Pressure test, connect a pressure gauge in the fuel pressure line after the fuel filter, located at the driver's side frame rail. Disconnect the vacuum hose from the pressure regulator. Apply battery voltage to the pump. After the pump stabilizes, the pressure should be 35-38 psi (245-256 kPa) and hold steady.

Apr 06, 2014 | Geo Storm Cars & Trucks

1 Answer

What is the fuel line pressure suppose to be,while running,on a 1998-4.6l-F150-V8?......Im at 30-31 psi....Having Misfires

Normal fuel pressure at idle is 30-40 psi. You should be able to disconnect the vac line to the regulator and see pressure go up.
If you think pressure is low, the fuel filter would be the first suspect.
The pressure regulator could also be faulty.

Dec 09, 2012 | Ford Cars & Trucks

2 Answers

1996 GMC Jimmy will start but wont idle

change the trottle position sensor

Jul 18, 2012 | 1996 GMC Jimmy

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Where is the oil pressure sensor lacted on a 1996 s10 2.2 Pickup

How much below 30 is it dropping? Oil pressure when in DRIVE at idle on a hot engine, is NORMAL at around 18 to 20 Psi. The warning lamp does not come on until around 7 Psi.

With that said, the oil pressure switch (for the light) is located on the lower left front of the engine. The fuel pump oil pressure switch and sender (for the gauge and fuel pump operation) is on the lower right front of the engine.

May 20, 2012 | Cars & Trucks

1 Answer


Try a new fuel filter. If that doesn't work, have your fuel pump tested for proper pressure. Bad gas, injector partially clogged, bad fuel pressure regulator, bad idle valve, etc., etc. List is endless-gotta start somewhere>fuel filter and fuel pressure check. Also, have your engine computer checked for trouble codes-you need an OBD 1 scan. Walmart sells a code reader for around 25-30 dollars. Make sure it is the right one for your car. If any trouble codes come up, it should direct you to the problem. Good luck.

Nov 10, 2011 | 1993 Plymouth Acclaim

3 Answers

1999 Grand Cherokee Limited, 95,000 miles, 6 cyl engine The Jeep stumbles, coughs and almost backfires when slowly accelerating from an idle speed. This occurs during the first 5-10 minutes the vehicle...


If fuel pressure is low and you have already replaced the fuel pump, then the problem is usually the fuel pressure regulator. The pressure regulator is in same assembly with fuel filter. The assembly is located to the fuel tank, bolted to the truck's frame. The pressure is tested connecting a gauge like this : Set Sealey VSE952 to the port on the fuel rail. The pressure on Grand Cherokee must be around 49 psi plus or minus 5 psi. If engine runs but pressure is below 44.2 psi , check for a blockage in fuel supply line between fuel rail and fuel pump module (e.g.kinked line). If the line is not blocked, replace fuel pressure regulator and filter. Test pressure with and without fuel cap on.

Another test to be done is reading pressure, then shutting the engine off with the gauge connected. If pressure goes down too quick, then the regulator is defective. After 5 minutes the pressure should not go below 24 psi. If it does replace the regulator.

If regulator is OK check for leaks at the injectors that can cause fuel pressure drops.To check for injectors leakage clamp off the rubber hose of the pressure gauge tool between fuel rail and the port. If pressure staysr above 24 psi and before was dropping, then a fuel injector or the fuel rail is leaking.

Below a diagram representing the fuel rail and test port. The engines from same years like your six cylinder have the port and rail in the same position.




Aug 04, 2011 | 1999 Jeep Grand Cherokee

1 Answer

Im gettin 11.9 mpg in 92 sonata 6 cylinder(3.0) I was told it could b my brain box. Would that be the engine control unit or the engine control module?

You have an engine control unit, but that is rarely the problem. Is your engine light on? If yes, let me know and I'll send procedures for extracting the trouble codes that may identify the problem.
If no engine light, the first thing I would check is the fuel pressure regulator. Pull the vacuum hose off the regulator and plug it with a golf tee. Start the engine and see if gas comes out the vacuum port on the regulator. Is indicates a busted diaphram. Even if the diaphram is good, I would then borrow a fuel pressure gage and run the tests below to make sure the regulator is working to keep the pressure at 39psi. Let me know if this isn't it or you have more questions.

  1. Relieve fuel system pressure.
  2. Turn ignition switch OFF and disconnect the negative battery cable.
When disconnecting any fuel system hoses, always place a shop towel to prevent residual fuel from spaying.
  1. Disconnect the high pressure hose at the delivery side. Using a fuel pressure gauge and adapter (09353-24000 or equivalent), install the adapter to the delivery pipe.
  2. Connect the negative battery cable.
  3. Activate the fuel pump, by applying battery voltage to the fuel pump drive terminal. Check that there is no leakage from pressure gauge or connections.


Fig. Fig. 12: Fuel pump drive terminal location-Excel

  1. Disconnect the vacuum hose from the pressure regulator and plug.


Fig. Fig. 13: Fuel pump drive terminal location-Sonata

  1. Operate the engine at idle and check the fuel pressure. Fuel pressure should be 47-50 psi (330-350 kPa).
  2. Reconnect the vacuum hose to the pressure regulator. With the engine idling, fuel pressure should be 39 psi (270 kPa).
  3. If the specified values are not met, make the necessary repairs, as indicated in the diagnosis chart.
  4. Shut the engine OFF. Check that the fuel pressure is maintained at the value indicated in Step 8, for approximately 5 minutes.
  5. Relieve the fuel pressure.
  6. Remove the fuel pressure gauge and reconnect the high pressure hose, using a new O-ring.
  7. Start the engine and check for leaks.

Nov 25, 2010 | 1992 Hyundai Sonata

1 Answer

2002 sebring where is the fuel pressure regulator located?

The fuel system is under a constant pressure, even with engine off. before servicing the fuel filter/fuel pressure regulator, the fuel system pressure must be released.
CAUTION The fuel system is under pressure when the engine is running, 58 psi, plus or minus 5 psi. (400 kPa plus or minus 34 kPa). The fuel pump module contains a check valve to maintain some fuel pressure even when the engine is not operating. This will help to start the engine. Before servicing the fuel filter/fuel pressure regulator, the fuel system pressure must be released.

Hope this help.

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98 camaro 3800series v6 engine will turn over but not star.sometimes it will start and run fine,but when you turn it off it won't start again.have changed fuel filter and fuel pressure regulator,no check...


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