The most valuable questions above I'm going to reiterate again below.
Keep this in mind: The word "misfire" can have many meanings, from a predictable dead miss to an intermittent stumble. It means different things to different people. Both of those problems would probably be called "misfiring" by a driver, but they would have completely different causes and would send you down very different diagnostic paths.
The answer to these two questions is the key to figuring this out. Until we know this answer, we don't know what direction to go in for trying to pinpoint the trouble.
Quote:
Originally Posted by v8volvo
Steady misfire from one cylinder?
Or intermittent bucking/stumbling/hesitation?
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