engine problem,not sure.2006 bmw 645ci - Bimmerfest - BMW Forums

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E63 / E64 6 Series (2004 - 2010)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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Old 01-21-2013, 08:46 AM
esquasedhc esquasedhc is offline
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Location: london
Join Date: Jan 2013
Posts: 9
Mein Auto: 2005 bmw 645ci
2005 BMW 645ci

Where do i start??? i am having BIG BIG problems with my baby

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!!!!
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