Hey guys, I have a 2005 GTO, T56. It is driving me crazy with this random miss that seems to appear after a prolonged hot idle. Like sitting at a light, in traffic, etc. It is SD mode, so I cant log misfires by cylinder. No other codes besides the MAF code pop up. If it starts missing, it will miss all through the rev range, including at WOT. If I turn the engine off and restart it, it is immediately "fixed" until the next long idle...
I have changed plugs and wires with no change. Currently plugs are BR7 gapped at .025. I also added a large ground from the engine to the chassis and resistance is .2ohms or less.
Will failing coils behave like this?
TIA for any help