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sprinkles08, ASE Certified Technician
Category: Chrysler
Satisfied Customers: 22676
Experience:  ASE Master & Advanced level certified, Chrysler Master Certified, Trans and Hybrid Specialist
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Chrysler Town and Country: I have a 2005 Chrysler town and

Customer Question

I have a 2005 Chrysler town and country with a 3.8L that started missing. We replaced plugs, plug wires and coil pack. When the old coil pack was checked it was not firing thru the front passenger side post and when the new coil pack was installed it showed the same thing. The van does not over heat and can be driven (slowly). Help!!!!!
Submitted: 2 years ago.
Category: Chrysler
Expert:  sprinkles08 replied 2 years ago.
Hello and welcome to JustAnswer!
If you have a coil that isn't firing yet the coil pack has been replaced then you have an issue with that coil's driver circuit. The powertrain control module actuates the coils by pulsing ground to them, if a coil isn't firing then the circuit is either shorted to power or ground, open, or the driver in the PCM has failed.
What will need to be done is first test the wire for a short to power or ground. If it's shorted then the PCM can be unplugged, if the short goes away then the problem is in the PCM. If the short is still present then there is a wiring issue between the coil and PCM.
If the circuit isn't shorted then it will need to be load tested or at least tested for continuity. If the wire is good and not shorted but there is no driver then the PCM can be condemned.