PO357 Igntion Coil Prim/Secondary Circuit Failure
#1
PO357 Igntion Coil Prim/Secondary Circuit Failure
Hi Ya!
Just picked up an 03' 2500 Quad 4WD Hemi 80K. CEL was on and checked the code before I bought it, po357 Ign. coil G primary/secondary circuit failure is the code. Figured replace the coil, no problem. Removed #7 coil which was rusty and cracked, installed a new one, cleared the code with scanner, code reappeared right away. Suspected new coil was defective and swapped with #1. Same result. Inspected the #7 coil plug and wires (did not test yet) and they look free of corrosion. Any techs out there can give me some wisdom.
Thanks!
Just picked up an 03' 2500 Quad 4WD Hemi 80K. CEL was on and checked the code before I bought it, po357 Ign. coil G primary/secondary circuit failure is the code. Figured replace the coil, no problem. Removed #7 coil which was rusty and cracked, installed a new one, cleared the code with scanner, code reappeared right away. Suspected new coil was defective and swapped with #1. Same result. Inspected the #7 coil plug and wires (did not test yet) and they look free of corrosion. Any techs out there can give me some wisdom.
Thanks!
#3
Thanks for the reply. Pulled the plugs and they were clean but changed them anyway, then checked the wires while running at the connector and getting a signal, bouncing a bit from 12-13V+. By the way, it's idling very smooth with no miss. Code continues to reappear after battery disconnect and scanner code erase. Possible loose ground somewhere? Any thoughts where to go from here?
Thanks!
Thanks!
#5
Hammer- I see where you are going with this. Tuner will advance timing throwing off spark to cyl. #7? I don't know if the previous owner reprogrammed with a tuner on the truck. I cannot reach him. I did do a search under the dash and hood for a performance chip but do not see one. If this is the case would a long term battery disconnect reset the PCM to factory settings?
Thanks again!
Thanks again!
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#9