N55 Valvetronic issues

M-technik-3 · 07-31-2022, 10:37 AM

Car spit out check engine and shut down cylinder 4 injector and has constant misfire. Pulled codes it appears to be valvetronic issue. Appeared out of blue.

sowbmw · 08-12-2022, 11:05 AM

Sorry to hear. Never had this issue, but I had surging rpms at startup and decided to replace the valvetronic motor + reprogram. I also replaced the ignition coils. Car only surges once now.

I recommend switching out the ignition coils for Delphi (buy all 6 at once), clear codes, then drive. If valvetronic code comes back then maybe the valvetronic motor needs to be changed.

M-technik-3 · 08-15-2022, 04:07 AM

Past couplw of weeks been blistering hot so just been driving my E91 will start digging this week, My small window unit in garage can't keep up with 9 days of 90 degrees, So I was not even considering going in the garage

07-31-2022, 10:37 AM	#1
M-technik-3 Major 2090 Rep 1,478 Posts Drives: E30 M3, E36 M3, 328iT, 335i Join Date: Mar 2020 Location: western Ma iTrader: (0) Garage List 1995 M3 [9.00] 2007 E91 [7.25] 1988 M3 [9.50]	N55 Valvetronic issues Car spit out check engine and shut down cylinder 4 injector and has constant misfire. Pulled codes it appears to be valvetronic issue. Appeared out of blue.
	Appreciate 0 Tweet Quote

08-12-2022, 11:05 AM	#2
sowbmw Enlisted Member 15 Rep 47 Posts Drives: silver bmw 335i Join Date: Mar 2016 Location: Toronto iTrader: (0)	Sorry to hear. Never had this issue, but I had surging rpms at startup and decided to replace the valvetronic motor + reprogram. I also replaced the ignition coils. Car only surges once now. I recommend switching out the ignition coils for Delphi (buy all 6 at once), clear codes, then drive. If valvetronic code comes back then maybe the valvetronic motor needs to be changed.
	Appreciate 0 Quote

08-15-2022, 04:07 AM	#3
M-technik-3 Major 2090 Rep 1,478 Posts Drives: E30 M3, E36 M3, 328iT, 335i Join Date: Mar 2020 Location: western Ma iTrader: (0) Garage List 1995 M3 [9.00] 2007 E91 [7.25] 1988 M3 [9.50]	Past couplw of weeks been blistering hot so just been driving my E91 will start digging this week, My small window unit in garage can't keep up with 9 days of 90 degrees, So I was not even considering going in the garage
	Appreciate 0 Quote