Engine kicks and bucks when warm.

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1994 F 150

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Shannon @shannon7548

Rep: 21

1

Posted: Aug 11, 2012

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Engine kicks and bucks when warm.

Runs fine when cool then acts up when warm.

Thought water in fuel. Added Heet no improvement.

New plugs. Hi test 93 octane no improvement.

Thinking air flow sensor or some other electronic thing.

Also has started to run high rpm's when coasting.

Help.

Answer this question I have this problem too

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1 Comment:

What engine is it, what transmission? Do you have any check engine lights on? have you tried to get any code from the on board diagnostics. This could be caused by many issues. From a vacuum leak to a bad PCV valve, to a bad fuel pump, as well as a bad intake intake air temp sensor or coolant sensor, and many more. So, the more information you can give us, the better.

Aug 11, 2012 by oldturkey03

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What engine is it, what transmission? Do you have any check engine lights on? have you tried to get any code from the on board diagnostics. This could be caused by many issues. From a vacuum leak to a bad PCV valve, to a bad fuel pump, as well as a bad intake intake air temp sensor or coolant sensor, and many more. So, the more information you can give us, the better. — oldturkey03