Question about 1991 Ford F150

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Engine accelerates on its own

1991 Ford F-150 2WD 6 cy. inline. Engine accelerates on its own while in park. Have to turn key off to stop it. What is causing this?

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Look for a vacuum leak, could be anywhere

Posted on May 28, 2010

  • ronnie roswell
    ronnie roswell Dec 03, 2010

    vacuum leak???? dude your throttle cable is stuck

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2 Answers

Nothing happens when turn key. 1984 ford f150 inline 6


Check the small wires to the starter relay for power when the key is turned to start. The small wires activate the relay. If the small wires have power, most likely the relay is bad.

You can bypass the relay with heavy jumpers. Make sure stickshift is in neutral or Park if its an automatic. If starter turns good with jumper, relay is bad.

Aug 22, 2012 | Ford Cars & Trucks

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How to turn of change engine oil light on 2011 ford focus


From FocusFanatics online - -

Resetting the oil life monitoring system
1. Turn the ignition key to the on position. Do not start the engine.
For vehicles with push-button start, press and hold the START/STOP
button for two seconds without pressing the brake pedal. Do not attempt
to start the engine.
2. Press both the accelerator and brake pedals at the same time.
3. Keep both pedals fully pressed.
4. After three seconds, the Service: Oil reset in prog. message will be
displayed.
5. After 25 seconds, the Service: Oil reset complete message will be
displayed.
6. Release both the accelerator and brake pedals.
7. The Service: Oil reset complete message will no longer be
displayed.
8. Rotate the key to the off position.
For vehicles with push-button start, press the START/STOP button to
turn the vehicle off completely.

Jul 07, 2012 | Ford Cars & Trucks

1 Answer

I have a 1991 ford probe 6 cy. My fuel pump went out and my son had a ford fuel pump that put out same psi as mind, only its alittle longer than mind. Now my battery will not hold a charge(it's dead).Could...


It shouldn't have anything to do with it. The fuel pump relay doesn't activate without the key being turned to the on or start positions so i can't be draining your battery.

Oct 01, 2010 | 1991 Ford Probe

1 Answer

My ford f150 4.9 inline 6 stalls when you


What engine code is stored in the computer? You may have a bad TPS (throttle postioning sensor), or a bad O2 sensor. Auto Zone can retrieve the code for you, and tell you what sensor it is related to.

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3 Answers

Is there a hidden 'inline' fuse on a 04/6 cy


There are seperate "trailer" fuses in the fuse box in the engine compartment. Separate fuses for trailer left, right and running lights.

Check all fuses, I had the same issue before.

Good luck.

Aug 24, 2009 | 2004 Chevrolet TrailBlazer

2 Answers

1994 Ford Escort dies at stops


I had the same problem a year ago. I problem was that the intake manifold gasket had a small hole and it was causing the computer to constantly change the air to fuel ratio. The constant changing cause the engine to die at stops.

Jul 02, 2009 | 1994 Ford Escort

1 Answer

I have a 1991 Ford F150 4 x 4 inline 6 4.6L. Dual


your truck is a 4.9L, make sure you have power to the front tank fuel pump. is the power to the pump is ok and you can hear the pump run for a second or two when you key the vehicle on... replace the fuel tank selector valve

Apr 17, 2009 | 1991 Ford F150

1 Answer

1986 Ford F-150 300 Inline-6


you might wanna try to clean/rebuild the carb

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