Engine is missing or miss-fireing on 1998 Ford Expedition

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

by in Mountain View, CA on May 20, 2014
1 answer
ANSWER by on May 20, 2014
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.
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