1991 Ford F-250 runs rough

JOE2705

MEMBER
1991 FORD F-250

Engine Performance problem
1991 Ford F250 V8 Two Wheel Drive Automatic

Hello hope you can help?
Engine is schacking like crazy and sounds like its sucking realy hard for air. Replaced faulty ECM relay and fuelfilter but still not better. Could it be the Fuelpump?Or a Valve or sensor for the Emissioncontrol?
would appreciate any help.

5 Replies

LEGITIMATE007

MECHANIC
5,121 POSTS

First thing check for vacuum leaks, check all hoses for disconnects, and holes or cracks in the hoses

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Thursday, June 5th, 2008 AT 5:36 AM

JOE2705

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4 POSTS

Checked all hoses but couldnt find nothing wrong. My wife is getting me an fuelpressure tester. Checked codes again and showed code 95(fuelpump circuit PCM to ground). Where do I look for that problem?

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Thursday, June 5th, 2008 AT 6:23 PM

LEGITIMATE007

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5,121 POSTS

Im gonna send you a video that will show you everything to do. Very easily.

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Thursday, June 5th, 2008 AT 9:40 PM

LEGITIMATE007

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Check this video out

https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm

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Thursday, June 5th, 2008 AT 9:41 PM

JOE2705

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4 POSTS

Thanks for the video.
Pressure is according to specs.
Truck runs good on propane.
Can it be the injectors?
Got a code 95(fuelpumpcircuit PCM to ground)