I got a good deal on a '93 Z28 a few months ago and I bought it for my girlfriend. It is almost undrivable now. Here is the deal: on light throtle, it kind of bucks and clunks back and forth. If you mash the gas usually it picks up and goes. Some times though it makes a loud "pop" out the front. (intake backfire?) It's been doing this for a while now, and it has gotten worse and worse. I was thinking it is most likely the LT1 Opti-spark. What do you think? I know these things are expensive, is there anything else I can try first? Could it just need new plugs & wires? I know a tune up on an LT1 is impossible without a lift. What should I do?

-carey
91 Z28 1LE (L98/4L60) #11 of 181

 

Check out http://www.v8fbody.com .. that's the sister site of the one in my signature. There's 4th gen guys over there.

-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.v6fbody.com mailbags

 

All of my LT1 Friends have had problems with the Optispark. I'll bet thats what it is. At least is sounds like thats what it is.

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Mike
1989 Turbo Trans-Am
11.42@119