I have a '96 3.8 Every once in a while it will not start.I have the stock security system that came with the car. Their is a chip in the key. The problem is sometimes it will not start or turn over. I turn the key and it does not do anything. The check engine light will come on but if I play with it for a while it will start right up with no problems, and the check engine light will go off. This problem happens more in cold weather than warn. I took it to GM but they told me I would have to leave it their and they would go out and start it every once in a while untill it throws the code again. But their is no chance that I will leave my car their so they can start it. It might take it a week to do it again. Any ideas? Other than a new ignition. And I did try a spare key, but it made no diference.

 

Try a spare key or a new key. The contacts on the key and switch eventually wear out and eventually the VATS does not see the key and prevents the car from starting.

 

Yeah sorry I didnt mention that before. I have tried my spare key and it made no difference. Any other ideas?