Originally Posted by jizaman
I'm new to this club and i'm guessing that i am not the only one with this problem. Why the hell does my car not start sometimes when i turn the freakin key! The security light is blazing away, and i'm there ready to buy a new goddamn car..
When you put the key in the ignition, it completes a circuit that tells the car you have a valid key. The car expects a key with a specific value of resistor pellet embedded in it. When the Security light is on and the starter won't crank the engine, it'* telling you that it'* not detecting the right resistance from the little chip in your ignition key, and thinks you're trying to steal the car with a copied key (i.e. one that does not have the right value of resistor pellet in it). (I assume the light stays on for about three minutes before you can try again, right?)
Try cleaning the little contacts on the key, or better yet, try another key (hopefully you have at least two). Ace Hardware stores have a "VATS Interrogator" box that enables them to check which key blank will be the correct one to use (there are about 15 different resistance values used), if you want to have another key made but don't feel like paying dealer price$.