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Originally Posted by stevebfl
With that great dump you got did you get some adaptation readings. The misfire is a result not a cause, most likely. So far you have a sum total of no information. Gotta have somewhere to start. Could be ignition could be fuel, I'd start with adaptation for first smell.
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Can an OBD-II reader give adaptation values? I think you need SDS for that?
Steve, if the only code thrown before was a #1 misfire, could there be a fuel trim or other reason for the misfire that wouldn't be severe enough (crossing threshold) to cause the misfire? If so, that makes sense. The good idle and terrible throttle tip-in performance seem like much more than a #1 misfire.
Are there adpatation values for ignition? When we were diagnosing my codes, we read the fuel trim values and quickly tracked down the AMM, but the misfire was quickly evident when checking the wires and I don't recall any other adaptation values being read by my mechanic.