I've been working on cars for 25 years owned this car for a year and it has had a stumble at high boost since i got it. I looked at plugs before but they looked new so it put them back in. Today i decided to put a fresh set of a/c plugs in gapped them to .32. So i had to try it out , WOW this thing rips now!!!! I guess the thing to do is start with the basics!