1998 Ford Expedition Q&A

1998 Ford Expedition Question: Engine is missing or miss-fireing

I am having a problem with the engine missing. I replaced all the coil packs, intake gaskets, mass air flow sensor and spark plugs and its still having a problem. My next thing is the e.c.m wanted to know if that would be a good next step thank you for your time, Tom Finnell -
Answer 1
Who's looked at the truck already? What codes is it setting? Stop throwing parts at it and get some diagnostic work done. You'll thank me later. -
Related Items:
i would like to know the fireing order of my 98 ford 4.6 would which plug is which
WHILE driving,especially on the highway, my check engine light which is already on begins to flassh. trying to find more likely reason.