2002 Chrysler 300 Car 3 Liter V6 Cylinders 1 3 4 Misfiring Codes P0351

2002 CHRYSLER 300
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TRISH28
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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?
Mar 20, 2013 at 11:12 PM
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ASEMASTER6371
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what wiring did you repair???

what about the plugs???

Roy
Mar 20, 2013 at 11:16 PM
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TRISHMILCHLING
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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.
Mar 20, 2013 at 11:21 PM
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ASEMASTER6371
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how many miles on the plugs???

the codes indicate missfire in first 1000 rpm at start up. could just be bad plugs

Roy
Mar 20, 2013 at 11:29 PM
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TRISH28
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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.
Mar 20, 2013 at 11:36 PM
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