Steady throttle low rpm issue - Page 2 - BMW 3-Series (E90 E92) Forum

mattsfeir · 03-06-2012, 10:26 PM

great info, my car has had the same issue for a long time and it seems to be getting worse

jeffreythethird · 03-06-2012, 10:30 PM

Thanks for the info enrita ... I will check this out!

TT3 iN NyC · 05-25-2012, 12:52 PM

Quote:

Originally Posted by enrita

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.

03-06-2012, 10:26 PM	#23
mattsfeir Lieutenant Drives: 335xi Join Date: Oct 2009 Location: CO Posts: 443 iTrader: (1)	great info, my car has had the same issue for a long time and it seems to be getting worse __________________ 2007 335xi 6AT / Vishnu Procede V5 / Vishnu DCI / Vishnu Meth kit (PWM) / AR Catless downpipes / Borla racing pipes with Magnaflow muffler / Borla exhaust system / AMS intercooler Best 1/4 time = 12.975 @ 107.15, 1.763 60' at Bandimere Speedway (5800' above sea level)

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03-06-2012, 10:30 PM	#24
jeffreythethird Sturmtrooper Drives: 2008 Space Grey 335xi Join Date: Jun 2011 Location: St. Louis, MO Posts: 194 iTrader: (0)	Thanks for the info enrita ... I will check this out!