I have an 04 crossfire and it wont start. At first for 2 weeks the cars battery would go dead if u let it sit for more than a day. Then one day I was driving the car the battery completely died and the car wouldn't stay on and it would crank but would not turn completely over. I bought a new battery and alternator and its holding a charge now but the car will still crank but will not turn over completely im not sure what the problem is im thinking the crankshaft position sensor but if that was bad the car would at least turn over but not stay on any suggestions?

 

I'm confused by your description.
First you say : followed by : so, is the engine turning over at all ?
If all you get is dash lights and no engine sounds when you turn to start, then that's usually RCM ( Relay Control Module ) related.
If the engine does turn over, but does not start, then that's usually a CPM or fuel related issue.

 

It would still turn over if it was the CPS and it would probably trigger a check engine light. From what you've described, I would go back to the battery first, make sure the connections are super tight and the battery is good.

I put an electronic ignition kit in my old speedster, going down the highway it just quit. It would turn over great but just wouldn't start. My negative battery cable was just tight enough to let it turn over but not tight enough to give my ignition a good ground. Up until that moment, I thought if it had enough juice to turn the motor over, the cables were fine. It made me a believer on making sure those cables are tight, especially on our electronic enhanced cars.

Dave