Question about 1990 Ford F150

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Engine Runs Rough When Cold...

When the engine is first started, I try to accelereate to get on the freeway and the engine balks and acts like there is water in the gas or bad gas or something. Once the engine has been driven for a good 5 miles, the problem seems to go away or is much less noticeable.

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  • malcolmjdryd Nov 26, 2008

    After driving the truck a few more times with this problem, I realized that the problem exists regardless of how many miles the truck is driven. It seems to manifest itself with engine sputtering during a particular RPM range (1800 to 2200 RPM), above which the problem seems to go away. I don't notice the problem at highway driving speeds; only when climbing an upgrade. If I downshift into a lower gear (resulting in an increase in RPM), the problem seems to disappear.

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There are 2 things id check first. the coolant temp sensor. and then the map sensor. good luck

Posted on Nov 24, 2008

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