I searched for the answer through the threads and it seems there is a connection between changing a thermostat and then the engine begins to misfire run rich and ping I have a 94 z28 the ses code stays on.

What did I ****-up?

 

find out whats codes you have.....


you didn't get water on the distibutor did you?

 

I'm sure I did.

 

well....get the codes...maybe try to blow it out if its vented, and then probly need a new opti.....

No big deal, it happens

 

Yeh I figured ... Is the MSD unit from summit ok? Or wich opti is the most used as a replacement?

 

factory/GM one

 

I'll go pull the codes
thanks for the info