My car has been idling erratically, misfiring, spitting/sputtering and bucking while driving. It is running extremely rich with a very strong gas smell. I've parked the car since it started. It never threw a trouble code up until yesterday and it was a P0300 but that's the only code. Multiple random cylinder misfires. From my understanding, P030x (X being a number other than 0) will tell you which cylinder is misfiring. I hooked my SCT x4 up and data logged and sent it to my tuner. He said Lambda bank 1 (drivers side o2) was reading very erratically and it was all over the place. He told me to replace both o2 sensors and the car will be fine. I'm just wondering if anyone else has experienced this? I've seen a Crankshaft Position sensor o-ring TSB that was related to P0300 code? Thanks for the help!
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