I have a 94 LT1 sometimes it will start and run fine others times it will not start at all. I have no codes in the computer. I have new LT1 Engine. I was told that it was a security system replaced the passlock and reprogramed. The low oil pressure light was on replaced that sensor and now that light is off. It has new fuel pump, alt, battery. I dont know what else to even try. I have fuel and fire but will not start. You can be driving down the road and it will just shut off. Can Anyone HELP!

Is there a way to test the Opti?

 

Lock cylinder security wire is broken. Way to test is measure resistance in your key. get the proper resistors from radio shack. suader them together and splice it into the harness for security system. If you need more instruction ask i can take pics and instruct you.

 

VATS system will not cause the car to die once it is running, also the car would not have fuel or spark if the VATS was not operating,( had it happen to me) get the car to a scanner to see if it is throwing codes

 

I recently had an intermittent no-start issue that ended up being a bad coil. Never died on me while driving but I could've just lucked out.