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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 06-17-2016, 03:02 AM   #1
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Join Date: Aug 2015
Location: NorCal
Posts: 197
My Ride: 2006 M3 6MT
Help, Engine Sputtering,Lost Power, Check Engine Light!

2006 M3
Almost 80k miles
1/2 tank of gas, used only 76 Premium, except 99 octane race gas 3 months ago

I had been driving up a mountain road about 8 miles, when Whilst driving and accelerating out of a turn, the car suddenly lost power, sputtered, check engine light came on. I barely limped her to the next turnout and turned it off. Waited 5 mins and started again. Opened the hood, nothing visible. Sputtering sounds like puffs of air coming from somewhere, no actual puffs but sounded like puffs.

Put my hand on the valve cover, no vibration or rattle like VANOS might sound like. No smoke from exhaust. Nothing else loose or vibrating. Temp remained normal.

ANy ideas?
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