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f250 Tow vehicle problem
Hi all,
I hope this is the correct place to post this question. I recently bought an '02 f250 with a 5.4l gas engine and I'm having a misfire issue When the air temp is about 70 or below the truck runs like a champ. However, when it gets hot outside I have a misfire. The engine misfires at idle or when I'm running along at about 50mph and try to accelerate it starts to buck. It seems the hotter the outside temp the worse the problem is. I never get a check engine light. Today the air temp is about 70 and I took the truck for a 20 mile ride and it ran without a single misfire. Any help would be appreciated. Roger |
I've heard those vintage modular V8's often have problems with coils going out. Also, the spark plugs galling into the threads in the heads. Most of them with over 100k miles have at least one helicoil in them if they've had the plugs changed.
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