Bare with me.... this is long. Went to the woodburn drag strip today. Not a good day for racing as temperatures was above 90. 1st run... 15 minutes after getting off the freeway, I ran a 12.5 @ 116+ MPH. On my 2nd run, I over reved the damm engine while doing a quick burn out to clean my tires. Staged and ran a 15.4 @ 102 MPH. No I didn't miss any shifts. I felt the car lost about 300 RWHP in 1st and 2nd gear, then 3rd gear comes up and it accelerates quicker than 2nd gear! I though maybe the computer hicupped and pulled timing or something. So I let her cool down for about 1.5 hours. Went out and ran a 13.5 @ under 110 MPH (forgot). WTF? My buddy and I reset my ECU by disconnecting the battery and trying to crank, etc... Let her cooled down for another 1.5 hour or so... 12.8 @ 106 MPH. WTF? Came back and listened to the car -- it sounded rough like it was missing. No more runs for me. Went home later and I could feel the car shaking and acceleration was not there as before. Still had boost and the car is still driveable but it felt weird. Kept off the boost and when I got home, I took out all the spark plugs (NGK-TR6). The part that surrounds the electrode was white, the electrode itself was dark, the metal curved tip was greyish white on the outside. I think I'm running lean? But how? The previous NGK-TR6 plugs that I used, all five were black, except three. The other three had reddish porcilin. (Porcilin is that ceramic part that surrounds the electrode, right?). I installed the old plugs back on, started her up and seems to sound fine. Went out and took a test drive and the car seems to pull hard again... I am at a lost as to what could possibly have happend. So here are my questions. 1) What happend? Did I fry a coil pack? Did I fry a spark-plug? I took a flash light and looked at all the plug holes. One of the piston top had black residue. All the other ones didn't or I didn't see any. What the heck does this mean too? 2) Why was the porcilin on all the plugs white? 3) Why was the porcilin on the previous 5 plugs black? 4) Why was the porcilin on the previous 3 plugs dark reddish? 5) I didn't check the computer chip, but could it have fallen off and forced a lean condition? (It can't cause I tapped the damm thing and there's no room to move on top.) Did the chip go bad then? 6) The car SEEMS to run normal again after putting in the old previous plugs. That brings up question 1, can a spark plug become bad in someway even without anything breaking off? The shitty part about all of this is that I lost to a 2001 Z06 when I should have whooped his ass hard! He ran a 12.9 @ 109 MPH to my 12.8 @ 106 MPH. He got the better reaction time so he finished first. Sorry I let all of you mustang brothas down..... My car was probably only running on 6 cylinders or something. Sorry for the long post, but any help or insight as to what the heck happend, I would greatly appreciate it.