My wife drove her Intrepid home with no problems at all. The following morning she said it wouldn't crank. The car spins over fine and the fuel pump is running like usual. So I pulled out a plug to see if it was sparking. No spark. I swapped the relays around in the fuse box and this didn't help. Anyone have this happen to them before?

 

It might be that the ignition coil went bad, try that next.

 

That vehicle has individual coil packs, if one was dead, car would still run with a missfire. I would guess at can/crank sensor not triggering pcm

 

How can you tell/troubleshoot the coil pack or even the individual one. What about common faliures, do they just quit, or missfire like crazy, when hot/cold or all the time? Thanks a lot.