LT1 Problem
thanks shawn
The reason I ask is because I had a brand new opti do this to me. Once the car warmed up the optical sensor would stop working and the car would just shut off with no codes. If you have access to a scanner (I used a Snap-On MODUS) let the car run until it shuts off on it's own and then check for both high and low resolution signals while cranking. I replaced the optical sensor with one from a known good unit and the problem was solved (until the rotor exploded).
If this problem existed with the old opti as well as the new one then it's unlikely that this is the cause of your problem.
Good luck.






