2003 Chrysler Sebring

DBSUTHER

MEMBER
2003 CHRYSLER SEBRING

2003 Chrysler Sebring 4 cyl Front Wheel Drive Automatic

I have 2003 Sebring (2.4L DOHC) that would not start at all (no spark). At that point there were no codes. I replaced the coil and it starts right up now however, it keeps giving codes for Ignition Coil A and B Secondary Circuit failures. It will start fine then when I go to drive, it pops a code and stops firing on one or more cylinders. If I pull over and kill the engine it starts right back up and stops misfiring temporarily. The length of time before it fails varies from 5 minutes to 45 minutes. The last time it seemd fine until I did a full power acceleration, then it died. When it dies it feels like it is running on 2 cyl MAX. I have also replaced the plugs and wires and ohmed the 2 feed wires from the pcm to the coil pack. Am I looking a a bad pcm here or could it be another input to the pcm?

Thanks!
Doug

2 Replies

JACOBANDNICKOLAS

MECHANIC
109,758 POSTS

Doug:
Have you checked the crank sensor?

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Friday, November 20th, 2009 AT 11:39 PM

DBSUTHER

MEMBER
2 POSTS

I have not checked the crank or cam sensors. I have never gotten a code from any of the sensors. I have since swapped the ASD relay and ohmed all wires to the coil pack and checked for shorts to ground on the wires wile moving the bundle around. I am also getting a P0351 code in addition to the secondary circuit codes.

My current take on it and my next step is to put a meter on the 12V coil input to see if it is dropping off when the car fails. I'm trying to see if it is a voltage input problem to coil (ASD circuit failure) or a failure on the pcm side. All the pcm does is provide a path to ground for the coil primary windings keeping the plugs from firing. If the pmc is intermittently shorting out internally - the plugs will misfire. Trying to locate an Oscope to watch the pcm control lines too.

I know the cam and crank sensors provide the timing for all of this but shouldn't I get a code if they are failing?

Thanks!
Doug