1991 Ford F150 misfireing

1991 FORD F-150
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FORDMAN2
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Shakes or Wobbles problem
1991 Ford F150 6 cyl Two Wheel Drive Automatic 177,oo miles

i have a 91 ford f150, 300 straght six, it has a misfire when it is idleing and when u try u accelerate, iv already put a new dustributer and cap on it new plugs, wires, throttle positioning sencor, egr vacum sylinoid and new fuil injectors and i check and couldnt find anyvacum leaks and none of this didnt help anything i dont know what else it could be if u could help me pleace do....thanks
Sep 1, 2010 at 10:01 PM
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JACOBANDNICKOLAS
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Is the misfire always there? Have you checked fuel pump pressure?
Sep 2, 2010 at 6:58 AM
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MATTHEW.ADELMAN
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Had this problem once with a mustang, ended up being a bad new spark plug, it was cracked internally and I replaced it, no more issues.

Also, have you checked the ignition coil? Let me know if either helps.
Sep 11, 2010 at 3:27 PM
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