Hi, I have a 1992 Buick LeSabre, 3.8L engine, with a no spark condition. I have replaced the ignition module, coil pack, cam sensor, crank sensor, coolant temp. sensor, and computer. Code reader shows only code 12. Any suggestions would be appreciated, Thanks.

does the car have vats, whats the security light doing, if anything

the car has the key (old style) with a contact chip in the shaft of the key type of anti theft device from the factory, the security light was on when I purchased the car over a year ago, comes on with the ignition and stays on until you shut the car off.

what it sounds like to me is when you bought the car the the wire in the ignition had broke while running which put it in fail enable mode. that will set off the security light when running, but basicly what has happened is the system has disabed its self. now when this happens there is a chance that when you shut the car off that the wires connect making the security work again, and then the next time you put the key in the wires disconect and the car always thinks it has no key

you can bypass the security or replace the lock cilynder i will try to find the link on bypassing

here you go i would give this a try
http://vats.likeabigdog.com/

that may work if its the ign cyl thats at fault or you can bypass the security module signal to the pcm with this:

http://www.3rdbrakeflasher.com/index...roducts_id=183

Reading the information on the link, I'm not sure this is my problem as my engine turns over but does not fire, I have fuel delivery, but no spark.

https://www.gmforum.com/trouble-shooting-test-procedures-141/engine-cranks-but-will-not-start-296982/

oh ok my bad