Quote:
Originally Posted by Smaay
I got a set of OEM plugs, ill put them in tomorrow. I got an email back from Edelbrock to check out the bypass actuator.
The car idles perfectly and cruises just fine. Its only WOT boost where its stumbling.
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Unfortunately, it is really hard to diagnose the problem given the electrical mishap because that opens it up to anything. It seems likely everything is fine electrically if you have no CELs, but it is hard to be certain. It is also odd that you aren’t getting any codes while on boost if it is breaking up.
Just to clarify, the car will run like shit, especially on boost or at serious load after reconnecting the negative battery terminal. You have to cruise around and turn the car off and on before the system goes out of this check mode. Even still, it will feel less sharp and responsive for a while until it relearns.
I don’t think your problems is or ever was the spark plugs. They don’t fail so precipitously. Moreover, how did they look? Was there visible damage, especially on cylinder 1’s spark plug? I’m guess not, and I don’t think the other plugs would do so poorly, even at a significant gap change.