Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Each time it's done the popping and backfiring was the battery low?
Hello, my name is ***** ***** I will try and help you. I have seen coolant temp sensors that are out of calibration cause this on the older 3.9 engines. Try replacing the temp sensor next to the thermostat and see if that helps. Other things it could be is a bad check valve in the fuel pump. That can allow fuel to drain back into the fuel tank when the truck sits overnight. That would cause hard starting first start of the day. Hopefully it is just the coolant sensor because that is a cheaper repair. Hopefully these suggestions will help you out.