A week ago I posted a problem I was having when I was at a track...my times sucked...really badly...and this was after a MAC headers install. My times didn't improve, they got worse. Luckily, there are so many intelligent people on this board that helped me sovle the problem. Yes the LT4 KM. You guys have no idea how the car pulls now. It feels like a new car again. I'm actually spinning tires now, when it's hot outside. It's great. Thank you so much for your help. I have another question though. I was trying to search about the optispark and signs of it failing. What are the first signs of the optispark failing? The best I could find, is hesitation. But what else? The car has 92K by the way.

 

When my opti went bad the car was shaking alot and it didnt accleerate worth the crap. My car is actually doing it agian, it hesitates really bad at about 2500- 4000 rpm range it like jerks back and forth. There was a web site that had and opti like built for racing, if your going to replace it find that one and get it. it says like you never have to buy another one, i cant seem to locate the website.