I've been getting the P0301 code on and off for the last two months. Firestone replaced plugs, wires, coil, and injector and also ran fuel system cleaner through it (total $900) and purred like a kitten for two weeks and then the code came back. They deferred me to Dodge dealer saying it's probably a burnt valve and they didn't want to get into that. Dodge ran their own fuel system cleaner and de-carbonization ($390) through and got nothing. They then replaced the valve ($1600! Which they said was burnt but wouldn't show me) and it still misfires. Compression comes back within normal range. Now they want to "test" to see if ECM is the problem. If not ECM, they want to pull the tranny and inspect the flex plate. They think its creating enough of a vibration that it is causing the misfire. What have they not considered or tried? They want $300 to diagnose the ECM and $600-$700 to pull and put back the tranny. The Dodge dealer told me they swapped/changed plugs and wires around to make sure they weren't missing anything there. They also ran a jumper wire from the molex plug on the ECM straight to the #1 injector to make sure it wasn't a wiring issue.
have the same problem?
Friday, October 9th, 2009 AT 4:53 PM