[blackrosenova400]

I had similar issues, tried new plugs at very low gap, went away for a day then came back, very frustrating. Tried spare spark plug wires, problem completely dissapeared. I probably moved the wires around a bit when trying new plugs, then it went away as wherever the wires were arcing at moved apart.

Also since my recent episode with a cracked wrist pin, while pulling my cylinder head off, I noticed my dam injectors clogged with that black crap! Also it left a nice puddle of black crap where it sprays in the cylinder head.
I guess before I get my car running again im gonna switch my fuel lines over to achohol compatible fuel lines as I think the black crap is eaten away rubber.

Maybe worth pulling yours if you run e85?