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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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Old 05-26-2013, 01:15 PM
johninjax johninjax is offline
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Location: Jacksonville,FL
 
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Mein Auto: 2014 X128i
RPM Jump

Periodicly while waiting at a light I will get a surge of 250 to 300 RPM's it feels like I've been tapped in the back. Never feel it driving, only at an idle, it could happen several times a week or once or twice a month. Always use Shell gas, but not always from the same station. Anyone have an idea? It's getting me worried.
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Old 05-27-2013, 06:14 AM
johninjax johninjax is offline
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Anybody?
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Old 05-27-2013, 09:09 AM
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thekurgan thekurgan is offline
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Is your a/c on perhaps? Could be bad gas, when was the last time you ran some fuel system cleaner like Techron concentrate plus through the tank?
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Old 05-27-2013, 11:59 AM
johninjax johninjax is offline
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Happens with A/C on or off . Two weeks ago ran a bottle of Techron.
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