99SD 5.4 Engine Probs
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Joined: Oct 2004
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99SD 5.4 Engine Probs
Help, I'm new at this do please bear with me...I have a 99sd w/137k on
it and just started experiencing missing/skipping/misfiring ..mainly under
load, generally not at idle, not a continuous thing, just sometimes. I dont
have any check engine light on, & really baffled at what it could be, any
help, suggestions, recommendation or just thoughts on the problem would
be appreciated,,,tks
it and just started experiencing missing/skipping/misfiring ..mainly under
load, generally not at idle, not a continuous thing, just sometimes. I dont
have any check engine light on, & really baffled at what it could be, any
help, suggestions, recommendation or just thoughts on the problem would
be appreciated,,,tks
New User
Joined: Nov 2004
Posts: 12
Likes: 0
I had a 5.4 in an expedition and presently in my 99SD. Both have had the similar problem and everytime it's been a coil pack. The problem is that the only way to find the issue is by putting on a computer. I tried other ways without success. New coils with labor tend to get costly. I haven't yet but other guys have posted that they have used "used" (from junk yards) 
coil packs!!! I don't know if I would try it or not!!
coil packs!!! I don't know if I would try it or not!!
Last edited by jcmjclem; Jan 20, 2005 at 04:54 PM.
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