Mechanics

CHRYSLER 300 WIRING PROBLEM

2002 Chrysler 300

Car has a 3 liter v6 and cylinders 1, 3, and 4 are misfiring. Codes are p0351, p0353, and p0354. I've checked the voltage repaired the wiring to the (COP) which all now have 12 volts, but all 3 cylinders still misfire. Vehicle has a new PCM was installed before I acquired the vehicle. I've also swapped out each of the (COPs) on all 3 cylinders with other (COPs) and its still misfiring. Im out of options and scratching my head. Can anyone advise something new to try?
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Trish28
March 20, 2013.




What wiring did you repair?

What about the plugs?

Roy

ASEMaster6371
Mar 20, 2013.
I replaced the two splits that power the (COPs) The plugs appear to be fine but I plan to change them out. I tested at the end of the plugs.

Tiny
Trishmilchling
Mar 20, 2013.
How many miles on the plugs?

The codes indicate missfire in first 1000 rpm at start up. Could just be bad plugs

Roy

ASEMaster6371
Mar 20, 2013.
Well I know the 351-356 codes are ignition coil primary/secondary circuit malfunction. Im not sure on exact mileage but its not spark plug issues.
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Tiny
Trish28
Mar 20, 2013.

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