Is this misfire? [16 sec video]

OITSTCIMurder · 02-03-2015, 09:58 PM

I bought 2007 E93 with the BMW performance exhaust. I don't think it needs a tune just for an exhaust but there is a pause in the exhaust sound during idle. The RPM moves a VERY little, almost unnoticeable.
Most notably between 9 and 14 seconds of the video

328i_E92_2007 · 02-03-2015, 11:52 PM

Sounds like my car with my AA exhaust. Seems normal to me.

Edit: My car only does that once or twice during cold start up, once warm no problem. After watching video again it sounds like your car does it more often. Not so sure if normal now.

cdgatti · 02-06-2015, 11:12 AM

record the sound at the engine and let us listen again

OITSTCIMurder · 02-06-2015, 03:04 PM

328i_E92_2007 was correct. I ran a code scan and got 29CF (Cylinder 3 misfire) however this is only during a cold start and SEEMS to go away after the engine warms up as I can no longer feel or hear that noise. I don't know what to make of that

shawntech · 02-07-2015, 02:34 AM

Sounds like mine before injectors were replaced on cold start

02-03-2015, 09:58 PM	#1
OITSTCIMurder New Member 4 Rep 15 Posts Drives: 2007 335i Convertible Join Date: Jan 2015 Location: California iTrader: (0)	Is this misfire? [16 sec video] I bought 2007 E93 with the BMW performance exhaust. I don't think it needs a tune just for an exhaust but there is a pause in the exhaust sound during idle. The RPM moves a VERY little, almost unnoticeable. Most notably between 9 and 14 seconds of the video
	Appreciate 0 Tweet Quote

02-03-2015, 11:52 PM	#2
328i_E92_2007 Private First Class 15 Rep 152 Posts Drives: 2007 328i Coupe Join Date: Jun 2014 Location: Los Angeles iTrader: (0) Garage List 2007 BMW 328i [9.00]	Sounds like my car with my AA exhaust. Seems normal to me. Edit: My car only does that once or twice during cold start up, once warm no problem. After watching video again it sounds like your car does it more often. Not so sure if normal now.
	Appreciate 0 Quote

02-06-2015, 11:12 AM	#3
cdgatti Colonel 255 Rep 2,547 Posts Drives: e90 328i Join Date: May 2011 Location: KY iTrader: (4)	record the sound at the engine and let us listen again
	Appreciate 0 Quote

02-06-2015, 03:04 PM	#4
OITSTCIMurder New Member 4 Rep 15 Posts Drives: 2007 335i Convertible Join Date: Jan 2015 Location: California iTrader: (0)	328i_E92_2007 was correct. I ran a code scan and got 29CF (Cylinder 3 misfire) however this is only during a cold start and SEEMS to go away after the engine warms up as I can no longer feel or hear that noise. I don't know what to make of that
	Appreciate 0 Quote

02-07-2015, 02:34 AM	#5
shawntech The Wolf 247 Rep 987 Posts Drives: stuff Join Date: Oct 2013 Location: Midwest iTrader: (0) Garage List [0.00] 2019 BMW M850i conv ... [0.00]	Sounds like mine before injectors were replaced on cold start
	Appreciate 0 Quote