N52 Mystery Misfire

SV_Amjad · 11-30-2016, 01:34 AM

Got a misfire problem on my 2007 e92 328i. Changed all 6 coils, worked for a couple days, then misfired again. Now I'm reading a misfire in cylinders 4,5,6. Changed plug and coils. Any suggestions?
Intake and straight piped exhaust are the only mechanical mods.

F22_Raptor · 11-30-2016, 03:44 AM

maybe the new coils you got were bad as well

roundle · 12-01-2016, 01:33 PM

Sounds like an Eccentric Shaft Position Sensor.

I'd take off the engine cover, unplug it and check to see if oil has found its way into the pins.

SV_Amjad · 12-01-2016, 03:58 PM

So i have 3 sets of ignition coils.
1) My oem ones with 101k
2) Used bosche with 32k
3) Brand new duralast set.
I changed spark plugs yesterday to a fresh set of bosches. My misfire comes and goes now. I used to have misfires in cylinders 4,5,6 but then at one point i was getting misfiring codes on 1,3,4,5,6 and now all of sudden its running good, i drove it for about an hour with no problem.. but as soon as i headed back towards home and i was a street away, SES light comes on and i get a code for cylinder 1 misfire. haha. I put some lucas fuel injector cleaner in the gas tank hopefully that helps. Im leaning to something fuel related maybe?

Camman · 12-01-2016, 04:25 PM

Is the car going into a limp mode when the SES light comes on? If it is, I also say check the Eccentric Shaft Sensor plug to see if any oil is in it.

Is there any oil in the spark plug holes? Has the valve cover gasket been changed or is it still original?

I'd take it to a shop and have them inspect it further before you throw more money at it.

Efthreeoh · 12-02-2016, 06:28 AM

What is interesting is cylinders 4, 5, and 6 are "Bank 2", so there may be a connection with that. Meaning some control of the Bank 2 cylinders, either electrical (coils) or fuel (fuel injectors) is intermittently failing. You can get misfires from the fuel preparation side too. Have you run a live scan on the engine to get a picture of how it is running?

SV_Amjad · 12-03-2016, 11:08 PM

02 sensors checked out good, coils are good, spark plugs are new. Ran fuel injector cleaner yesterday and the car kept a smooth idle. drove it, no problems. Just scared to push it cause it seems whenever i punch it, a cylinder fails and it throws SES and misfires.

Bavarian Tech · 12-04-2016, 03:35 PM

Are you sure the coils are plugged in all the way ? What brand of coils did you use ? Bosch Or Delphi

SV_Amjad · 12-04-2016, 08:57 PM

Coils are seated properly, bosch plugs.. car seems to be running fine now

Chriztofor · 12-06-2016, 03:46 PM

What codes are being thrown?

djh2 · 12-06-2016, 04:42 PM

Quote:

Originally Posted by Bavarian Tech

Are you sure the coils are plugged in all the way ?

Also, don't rely on the lever on the spark plug connector to seat the wire properly. After 9 years, this was the case, and my cylinder #4 misfire was due to a cable not pressed in all the way.

Might not be the issue, given that it is a whole bank, but it would be something to try

SV_Amjad · 12-07-2016, 06:56 PM

Ran the lucas oil fuel injector cleaner and let it idle through half a quarter tank. has new plugs and and coils. She seems to be running fine again so far! No more shit gas for her. She's picky lol

11-30-2016, 01:34 AM	#1
SV_Amjad Private 11 Rep 60 Posts Drives: E92 328i Join Date: May 2016 Location: California iTrader: (0)	N52 Mystery Misfire Got a misfire problem on my 2007 e92 328i. Changed all 6 coils, worked for a couple days, then misfired again. Now I'm reading a misfire in cylinders 4,5,6. Changed plug and coils. Any suggestions? Intake and straight piped exhaust are the only mechanical mods.
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11-30-2016, 03:44 AM	#2
F22_Raptor Lieutenant 115 Rep 424 Posts Drives: 2008 328i Join Date: Aug 2015 Location: Touring CA iTrader: (0)	maybe the new coils you got were bad as well __________________
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12-01-2016, 01:33 PM	#3
roundle EXPAT 67 Rep 889 Posts Drives: 18 VW GTI;18 CX9;11 E91 N52 Join Date: Apr 2010 Location: USA iTrader: (0)	Sounds like an Eccentric Shaft Position Sensor. I'd take off the engine cover, unplug it and check to see if oil has found its way into the pins.
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12-01-2016, 04:25 PM	#5
Camman What am I doing here? 195 Rep 463 Posts Drives: 07 328i 6MT Join Date: Sep 2013 Location: Houston iTrader: (0)	Is the car going into a limp mode when the SES light comes on? If it is, I also say check the Eccentric Shaft Sensor plug to see if any oil is in it. Is there any oil in the spark plug holes? Has the valve cover gasket been changed or is it still original? I'd take it to a shop and have them inspect it further before you throw more money at it. __________________ N52 : 6MT : ZSP : ZPP : BC Racing Coilovers : BMW PE
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12-02-2016, 06:28 AM	#6
Efthreeoh General 19186 Rep 19,718 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	What is interesting is cylinders 4, 5, and 6 are "Bank 2", so there may be a connection with that. Meaning some control of the Bank 2 cylinders, either electrical (coils) or fuel (fuel injectors) is intermittently failing. You can get misfires from the fuel preparation side too. Have you run a live scan on the engine to get a picture of how it is running? __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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12-01-2016, 03:58 PM	#4
SV_Amjad Private 11 Rep 60 Posts Drives: E92 328i Join Date: May 2016 Location: California iTrader: (0)	So i have 3 sets of ignition coils. 1) My oem ones with 101k 2) Used bosche with 32k 3) Brand new duralast set. I changed spark plugs yesterday to a fresh set of bosches. My misfire comes and goes now. I used to have misfires in cylinders 4,5,6 but then at one point i was getting misfiring codes on 1,3,4,5,6 and now all of sudden its running good, i drove it for about an hour with no problem.. but as soon as i headed back towards home and i was a street away, SES light comes on and i get a code for cylinder 1 misfire. haha. I put some lucas fuel injector cleaner in the gas tank hopefully that helps. Im leaning to something fuel related maybe?
	Appreciate 0 Quote

12-03-2016, 11:08 PM	#7
SV_Amjad Private 11 Rep 60 Posts Drives: E92 328i Join Date: May 2016 Location: California iTrader: (0)	02 sensors checked out good, coils are good, spark plugs are new. Ran fuel injector cleaner yesterday and the car kept a smooth idle. drove it, no problems. Just scared to push it cause it seems whenever i punch it, a cylinder fails and it throws SES and misfires.
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12-04-2016, 03:35 PM	#8
Bavarian Tech Major 270 Rep 1,206 Posts Drives: 335i Join Date: Jan 2007 Location: Pittsburgh/Harrisburg iTrader: (15) Garage List 2006 330i [10.00]	Are you sure the coils are plugged in all the way ? What brand of coils did you use ? Bosch Or Delphi
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12-04-2016, 08:57 PM	#9
SV_Amjad Private 11 Rep 60 Posts Drives: E92 328i Join Date: May 2016 Location: California iTrader: (0)	Coils are seated properly, bosch plugs.. car seems to be running fine now
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12-06-2016, 03:46 PM	#10
Chriztofor Colonel 103 Rep 2,783 Posts Drives: '06 325i and '13 X5 Join Date: Feb 2010 Location: Chicago Burbs iTrader: (1)	What codes are being thrown?
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12-07-2016, 06:56 PM	#12
SV_Amjad Private 11 Rep 60 Posts Drives: E92 328i Join Date: May 2016 Location: California iTrader: (0)	Ran the lucas oil fuel injector cleaner and let it idle through half a quarter tank. has new plugs and and coils. She seems to be running fine again so far! No more shit gas for her. She's picky lol
	Appreciate 0 Quote