I have 1992 Z28 that does not start all the time. Every once in a while after I turn the key all the lights go on, but starter does not cranck. I thought it was the relay changed four of them, so then I thought it was the starter, swapped that too. But the issue persists. The weird thing is after I let it sit for five mins, and try again, I fires right up. Anyone had a similar issue? Help pls...

 

Sounds like you have a vats issue. If you are still using the vats system, the pellet on the key could be worn not making good contact in the ignition lock cylinder or the contact prongs in the ignition lock cylinder could be worn or dirty. Its a common problem with our cars. Most people just bypass the key with a resistor. Lots of info on the site that tells you how to do this. I would start there.

 

I actually had a new key made, I'll try that first. I checked my old key , you are absolutelly correct the chip edges are all worn out. Thanks!