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Re: LS3 - 408 Popping - 6L80e not shifting ....
It sounds ridiculous…..but ohm out from the ECU, to each individual coil trigger wire on all 8 cylinders to make sure 1-1, 2-2 etc.
I bought a set of coil harnesses online somewhere, that were mis-wired. It would idle ok, drive Meh ok at low throttle then all hell broke loose at WOT.
An infared gun at idle on each header tube was the first indicator. I had say 200* on a couple runners, and 120* on 2 others.
Plugs were just firing whatever off-time residual fuel was in the cylinder. They weren’t dead, and it didn’t show up much at idle.
Maybe you have a similar situation and that’s causing stuff to go into Help Me mode and not shift right?
Just a thought….
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11-08-2024, 09:04 PM
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