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      10-31-2012, 11:02 AM   #1
ericruiz911
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09 335i automatically accelerating and decelerating

Hey everyone,

Car is currently at the dealer because I was doing maybe 70 holding constant and I started feeling a slight jerk back and forth. I switched to live MPG on dash and it was jumping from 32 to 26 and back and forth. I would accelerate and it would be fine until I would hold it at a constant speed. The dealer cannot seem to duplicate. Has Anyone ever experienced this?
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      10-31-2012, 08:56 PM   #2
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Quote:
Originally Posted by ericruiz911
Hey everyone,

Car is currently at the dealer because I was doing maybe 70 holding constant and I started feeling a slight jerk back and forth. I switched to live MPG on dash and it was jumping from 32 to 26 and back and forth. I would accelerate and it would be fine until I would hold it at a constant speed. The dealer cannot seem to duplicate. Has Anyone ever experienced this?
Only thing I've had give that sensation in an n54 engine is carbon buildup
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      11-04-2012, 01:23 PM   #3
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Well dealer figured it out. 3 injectors were clogged so it looks like the ECU was trying to compensate AFR to fuel PSI and it was fluctuating causing this. Hopefully get her back monday
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      11-04-2012, 08:08 PM   #4
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Any codes?


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Originally Posted by ericruiz911 View Post
Well dealer figured it out. 3 injectors were clogged so it looks like the ECU was trying to compensate AFR to fuel PSI and it was fluctuating causing this. Hopefully get her back monday
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      11-05-2012, 12:05 PM   #5
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Any codes?
I post a copy of the service receipt once I get the car back. Thursday makes it 2 weeks at the dealer
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