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cold car starts fine but when hot truns over but wont start


pc813
05-23-2008, 02:21 PM
i have a 98 gtp and when its cold it starts fine but after about 5 mins of running it starts wanting to stall and me rpms go to 0 and my trac light comes on and then dies but i can still here my fuel pump running sometimes and it has like a clicking sound coming from the fuel rails and i have fuel pressure but it wont start until about 15 mins later and then runs fine for about another 5 mins and then does the same thing again could somebody please help me with this problem

richtazz
05-23-2008, 03:11 PM
It sounds like a bad crankshaft position sensor to me. They don't always trip a Check Engine Light, and will cause the stalling/no-start, tach dropping to zero and trac-off light you describe.

pc813
05-24-2008, 10:52 PM
i replaced the cps today but still doing the same thing any other ideas

tblake
05-24-2008, 11:09 PM
Remove the ignition module and bring it to autozone or advance for testing. Have them do it twice to get it nice and warm.

Have you tried a fuel pump resistor bypass yet? Check the tips and maintenance subforum.

pc813
05-25-2008, 10:41 AM
is there any way that this is caused by the EVAP canister being full

tblake
05-25-2008, 07:04 PM
Nope, I dont think an EVAP canister can ever fill up, your PCM commands the EVAP Purge valves open and empties the vapors back into the intake manifold.

pc813
05-25-2008, 08:33 PM
i also just found out that when it shuts off and wont start back up that it is getting no spark is this symtoms of the icm going bad

tblake
05-25-2008, 10:56 PM
ICM or else CPS, you changed the CPS already so the ICM is the next possible issue. Like I said just remove it and take it in for testing. No sence replacing something that isnt bad.

pc813
05-27-2008, 11:50 AM
took the icm to auto zone they said that it was good. any other ideas.

richtazz
05-27-2008, 12:46 PM
You could have a bad replacement CKPS (especially if the one you bought is a cheapo aftermarket brand), or the wiring to it has chaffed through or is corroded.

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