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Repair guides and support for the eighth generation of Ford F-Series trucks: the F-150, F-250, F-350, and F-Super Duty.

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My 1990 truck is a F150 4.9L runs rough will not start now.

My truck when running sometimes runs rough, burns rich .

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답변 2개

First up u need to replace the starter

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If it was running rich, it would run rough, and it likely fouled the spark plugs with carbon. Is so, cleaning or replacing the plugs will allow it to run again. But, the catalytic converter(s) will be damaged if they are not already.

The real problem is the rich condition. There could be many causes of rich mixture, dirty/sticking injectors, bad sensor(s), bad computer, clogged air cleaner, disconnected or problems with wires or vacuum hoses.

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귀하의 답변을 추가하세요

chauncey robinson 님은 대단히 고마워 할 것입니다.
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