Help!! I have a 95 Z28 with LTI engine. The car will start and then shut off after running for a minute or 2. Then it won't start again unless u let it sit for 15-20 mins and then only runs for a minute or 2 again.

Have changed the coil pack, didn't help. The security system has been disabled for years.

Any suggestions?

 

Have you had your Opti-Spark replaced recently. I'm no LT-1 expert, but that seems to be a common problem.

Are you throwing any codes?