My 1997 Monte Carlo has a security feature that prevents my car from starting, sometimes for hours at a time.?

Question

There's a chip in the key that apparently has to synch with a computer elsewhere in the vehicle, and if it doesn't, I'm supposed to wait three minutes for it to start. It doesn't always start after those three minutes, and on two separate occasions, I was stuck in my car for an hour each time, and two nights ago, I was without the car because it wouldn't start for at least seven hours before I gave up on it. What's wrong with it and how much will it cost for me to get it repaired? Thank you for any help.

Answer 1

I have heard this question more times then ive heard any other question. This is such a common problem with monte carlos.
There is an rf tag inside the key. Its similar to the tag you put inside pets to find them if they are lost. The sensor on the key tumbler reads the rf tag, sends the code to the ecu and then allows you to start the car. The only thing you can do, is to replace the key.
Gm charges $90 bucks a key.
There is an article on google that i read, where a guy cut up his key, and copied the rf tag signature, build a little memory board, and placed it inside his dash. He then could use a non rf tag key to start the car. But, this would require alot of work, and i couldnt tell you how to do it. if your interested, im sure you can google it.

Answer 2

Get a new key. Usually the chip in the key will go out before the computer in the car. If you have a new functioning key, and the problem persists,then the computer in the vehicle is likely having issues. This car is ten years old, so issues like this are not uncommon.

Answer 3

Have a new key cut by a G.M. dealership