engine problem,not sure.2006 bmw 645ci
bought some bad gas "low grade" and ever since then my car has been rough / erratic idling. i called a friend of mine who used to be a bmw tech, he advised me to drop my tank, dump the gas, clean the injectors and put virgin fuel back into my tank.
i have since done that, how ever, my car is still backfiring. even without starting my car, when i turn the ignition to the 2nd position i hear a clacking sound coming from the throttle body. i have reason to believe that once i eliminate that sound my car will stop backfiring.
has anyone else had this problem? pls help!!!!