Recent content by Ron93ruby

No, it did not activate the check engine light or set any codes, at least any that can be retrieved by watching the check engine light flash. I concluded it was the Optispark and knew i didn't want to tackle replacing it myself so I took it to a garage in Glen Burnie MD that works on vettes and...

Thanks to all who replied with info and suggestions. The problem turned out to be the oxygen sensors.

I had that problem with an 87 and solved it by replacing the IAC.

Thanks, I reread that thread and it does address the temperature aspect of the Optispark failure so I guess my Optispark needs replacement.:beer

Hi - I have a 93 ruby conv LT1 with 44,000 miles, garage kept that all of a sudden began misfiring badly when coolant reaches 180 degrees. It runs and idles smooth until it warms then it misfires so badly that it won't move. No check engine light and no hard codes set. It backfires a lot and...