Question about 1998 Ford F150 Regular Cab

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Truck was running fine coming back from vacation

Truck (4.6) was running fine coming back from vacation pulling our trailer until a major hill with significant time in #2 gear. Once at the summit check engine light flashed for quite awhile and then stayed on. I stopped and opened the hood in case it was a heat issue however none of the gauges indicated any increase in heat. I had all of the fluids and filters changed before we left on our trip. Under load engine is strong but once in top gear (cruising)runs rough. Also at idle is rough but if you rev the engine there is no misfiring.Turning off the engine has no effect on the light straying on.

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I would suggest going to Autozone and have them check for code or codes that might have occured,they will do it for free and diagnose what the problem might be. But anytime the check engine light comes on it has to do with your emission,possibly an oxygen sensor may have went bad,have them pull the codes and see what the prob is.

Posted on Jul 18, 2009

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My 2000 F-150 did the samething after pulling our trailer. turned out it was a coil pack. coil packs run $45 to $50. coil packs are easy to change out. hope this helps out

Posted on Aug 03, 2009

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Sounds like it tuliped the a valve. You should find the cyl. that is missing and check compression. With the heat built up from pulling the hill they try to pull the valve through the head, this will also light up the check engine light. Hope this helps Good luck

Posted on Jul 29, 2009

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