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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Steady throttle low rpm issue



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      03-06-2012, 10:26 PM   #23
mattsfeir
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great info, my car has had the same issue for a long time and it seems to be getting worse
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      03-06-2012, 10:30 PM   #24
jeffreythethird
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Thanks for the info enrita ... I will check this out!
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      05-25-2012, 12:52 PM   #25
TT3 iN NyC
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Quote:
Originally Posted by enrita View Post
For quite some time now i have been experiencing a weird issue.
At steady throttle around 2000 rpm mostly on high gears the engine kind of accellerates by itself 100 rpm and goes back in a wave like motion.
I can see the negative boost pressure going from like minus 18 to minus 12 or so .
This happens on procede, cobb and stock. i thought it could have been related to injectors but those are all new now. All lambdas are new as well as spark plugs.
I also thought the AT transmission was the cause but i have rebuilt it.
I think it pretty much started to notice this after the engine was rebuilt. Not sure though .
The head is also ported.
What do you think it could be?
Hi Enrita

was your issue similar to this video? This is whats happeneing to me.

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