Misfire Cyl 1,2,3,6

F82Stian · 03-03-2024, 09:03 AM

Hey guys! Ive ran into an issue after installing downpipes. Got a faulty lamdasonde, don’t know what downpipe its fault with. any ideas of which one of the downpipes it is on. is it the long downpipe or the short one?

Always misfiring after startup with closed valves

WhiteFox · 03-03-2024, 01:17 PM

Are sensors installed and working. Open flap on start up and have you checked this? Seems like exhaust gas can’t leave.

iDriftYou · 03-05-2024, 10:34 PM

Change your pre-cat o2 sensors

03-03-2024, 09:03 AM	#1
F82Stian Registered 0 Rep 3 Posts Drives: BMW M4 F82 Join Date: Feb 2024 Location: Norway iTrader: (0)	Misfire Cyl 1,2,3,6 Hey guys! Ive ran into an issue after installing downpipes. Got a faulty lamdasonde, don’t know what downpipe its fault with. any ideas of which one of the downpipes it is on. is it the long downpipe or the short one? Always misfiring after startup with closed valves Attached Images
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03-03-2024, 01:17 PM	#2
WhiteFox Second Lieutenant 108 Rep 237 Posts Drives: BMW M4 F83 Join Date: Sep 2019 Location: London iTrader: (0)	Are sensors installed and working. Open flap on start up and have you checked this? Seems like exhaust gas can’t leave.
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03-05-2024, 10:34 PM	#3
iDriftYou Private 39 Rep 78 Posts Drives: 2018 BMW M3 ZCP 6 Speed Join Date: Jan 2017 Location: SoCal iTrader: (0)	Change your pre-cat o2 sensors
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