Question about 1990 Ford F150

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1990 f150 sputters after warmed up.

Starts up fine every time, 4.9 litre 4speed under 100,000 miles.runs great until it warms up. 10 minutes or so, then sputters badly during acceleration. it never stalls, just sputters badly. I changed spark plugs, wires, cap and rotor. no change. What do you think. Thanks.

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Replace the fuel filter.

Posted on Jun 25, 2009


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