Recently I've been having problems with my car starting. I don't drive it that much (maybe once a week). It starts fine and drives fine when it has been sitting for a while. If I take it out and drive it for a while and then shut it down, it won't start back up. I have full power to everything (lights, radio, gauges are all working). I turn the key and nothing happens. I leave it sit overnight and it starts right up...

 

Does your car have VATS?

 

Do a search for "heat soak" and one for "ignition module."

See if either/or desctribe your predicament.

 

Vehicle Anti Theft System? Nothing more than the factory chip embedded in the key...

 

Sometimes that chip wears down and the car won't start because the chip doesn't make contact. That's usually an all at once episode that doesn't fix itself. I'd check for the heat soak article listed earlier. But if it makes you feel better, try your spare ignition key to see if that fixes the problem.

 

Doing some searches for heat soak and ignition module led me to some possible causes:

1. Starter (heat soak)
2. Ignition module
3. Injectors (but the car runs fine, it just won't start when hot)

Any other possibilities???

My first thought was the starter, until it started right up after sitting all night...

 

I definitely will rule out the key before I start dismantling things... I agree, it sounds like heat soak.

 

Let us know how it goes.