So i change the sparky plugs on my rb25det today cause she was missfiring all over the place at high-rpm, the plugs are gapped to 0.08, the car drives fine, no misfiring at all, and runs smooth as hell when not ideling, but at idel it sounds like a lump v8, and on the boost guage the VAC section jitters around. I checked back under too see if i forgot to plug a hose in and everything looked fine, could the plugs not all be gapped the same? u checked them all with a feeler gauge and they seemed fine! What else could it be? I have a slight hole in the end of my exhast but i dont think that has anything todo with it!
Nate