libertybob
Full Access Member
Yesterday my wife was driving Libby and the MIL started flashing and the engine was losing power. She drove about 300 yards to a safe parking area and shut off the engine. I was right behind her in my truck so pulled over. We swapped vehicles. I started the engine (3.7l) and the MIL light was lit without flashing. I drove Libby home and all seemed normal. I pulled the codes P0300 multiple misfire, P0303 misfire # 3 cylinder and P0306 misfire on # 6 cylinder. I erased the codes and started the engine. The MIL light went out after starting as normal. I drove the vehicle around the block several times and no MIL. Since #3 and #6 cylinders are on opposite banks of the engine, I believe the misfire must have a common cause.
I had filled the gas tank about 15 miles earlier at a high volume gas station. Could there have been moisture in the gas that would cause a misfire? I have read that the relay might also be suspect. I have done a lot of reading about misfires last night and replacing parts without diagnosing the root cause seems common. I put 6000 miles on Libby since acquiring her and this is my first misfire. So, please help with your thoughts of how to identify the root cause.
I had filled the gas tank about 15 miles earlier at a high volume gas station. Could there have been moisture in the gas that would cause a misfire? I have read that the relay might also be suspect. I have done a lot of reading about misfires last night and replacing parts without diagnosing the root cause seems common. I put 6000 miles on Libby since acquiring her and this is my first misfire. So, please help with your thoughts of how to identify the root cause.