I have a 1995 Blazer OBDII. I zapped the ignition module a while back by using a remote battery that was on the garage floor. I connected it to the battery terminals of the blazer with a pair of jumper cables. There was not a battery in the car. I hooked up my 200 amp charger directly to the battery terminals of the car while it was hooked to the battery in the floor (dumb). I replaced the ignition module and all was fine for a few start cycles. About every 3rd or 4th time the car would crank with a no-start condition. It would fire up and stall immediately. Then it would just crank. It had no spark at the coil. After replacing the cam sensor, crank sensor, ignition coil, ignition module (for the second time), and computer it still has the same problem. Now it has spark at the coil and 50psi fuel pressure but will not start. I know, it makes no sense. If I disconnect power from the computer for 30 or so seconds it will start immediately. It NEVER stalls after this and has no drivability issues, only the no-start issue. I’m not sure what to look for anymore. Did the 1995 have any type of passkey feature that could be causing this? I know that the key does not have a chip but I have a 2002 Monte Carlo that is built into the lock cylinder. If not, any ideas? Thank you.