02-20-12 10:06 PM - Post#2193210 In response to MikeB
I've stuck with the AC/Delco plugs in my Chevy and GM's the day I tried Bosch plugs. I put a set of the Bosch platinums in once and took them back out the same day, the car wouldn't even run straight, like it was missing on at least one or two cylinders. I tried regapping and moving the plugs to different cylinders and it had no effect. I put the original AC 44's back in after cleaning them and ran them for another 5000 miles.