PLS Help F10 N55 constant misfire on cylinder 3

NJQG · 02-22-2020, 10:30 PM

Car was running MHD stage 2 when it first started to get the misfire. Changed all the plugs as well as new coils. Problem still on cylinder 3. Next i figured maybe i'd try the fuel injector. Changed that and had it calibrated. Still same issue on cylinder 3. I also set the tune to stage 0. Just to see if it would by chance help it did not. I'm lost on what to do so any help or direction would be greatly appreciated. Car has intake, charge pipe, intercooler, and catless dp if that makes any difference.

ey2001 · 02-22-2020, 10:53 PM

Quote:

Originally Posted by NJQG

Car was running MHD stage 2 when it first started to get the misfire. Changed all the plugs as well as new coils. Problem still on cylinder 3. Next i figured maybe i'd try the fuel injector. Changed that and had it calibrated. Still same issue on cylinder 3. I also set the tune to stage 0. Just to see if it would by chance help it did not. I'm lost on what to do so any help or direction would be greatly appreciated. Car has intake, charge pipe, intercooler, and catless dp if that makes any difference.

Did you try changed the plugs and coils from cyl 3 to any others see if it changes? After that if it's still cyl 3 I would do a compression test

NJQG · 02-22-2020, 10:56 PM

Quote:

Originally Posted by ey2001

Did you try changed the plugs and coils from cyl 3 to any others see if it changes? After that if it's still cyl 3 I would do a compression test

I swapped all out with new plugs and coils.

Bmw doubles · 02-22-2020, 11:49 PM

Did you tap your plugs down? Anywhere between .18 - .22

You can put in a gallon or 2 of e85 to calm the knock without any fuel upgrades. Don't go past 2 gallons if you don't have upgraded fueling hardware

mfractal · 02-23-2020, 03:58 AM

Did you install new decoupler rings with the new injectors ?

ey2001 · 02-23-2020, 09:28 AM

Quote:

Originally Posted by NJQG

Quote:

Originally Posted by ey2001

Did you try changed the plugs and coils from cyl 3 to any others see if it changes? After that if it's still cyl 3 I would do a compression test

I swapped all out with new plugs and coils.

Yes I know but who knows if that one new plug is bad... I am just asking because it happened to me... I installed new plugs and cyl 2 was misfiring so I changed it out with my cyl 1 and then I was getting cyl1 misfiring so I took that plug back to dealer and I showed them the misfiring and the receipt and gave me 1 new plug..

NJQG · 02-23-2020, 09:49 AM

Quote:

Originally Posted by Bmw doubles

Did you tap your plugs down? Anywhere between .18 - .22

You can put in a gallon or 2 of e85 to calm the knock without any fuel upgrades. Don't go past 2 gallons if you don't have upgraded fueling hardware

I used oem plugs and did not tap them down.

NJQG · 02-23-2020, 09:52 AM

Quote:

Originally Posted by mfractal

Did you install new decoupler rings with the new injectors ?

Yea i made sure to use a new decoupler with new injector. Im stumped on what to do next im going to try swapping the plugs around to see if there is any change. Although they are all new?

badass335 · 02-23-2020, 01:35 PM

i'm having the exact same issue. I also have MHD but my car is completely stock otherwise. New plugs were installed a few weeks ago at my dealer. Even before the plugs i noticed the the car would be idling, i'd get a single "jerk' or "stumble' randomly. it started happening about a month ago. i removed MHD completely and still had the "stumble". What i did notice was if i applied load to the car, (climbing a hill, put in 5th or 6th gear manual mode at a low speed and try to accelerate), the car would start to stumble and go into limp mode. the other thing i noticed was at slower speeds and lower rpms, even maintaining a speed at say 1500rpm, i could feel the random "stumble" here and there. I'm going to look at new coils, just because i haven't replaced them for over 100,000kms. Be interesting to hear what your resolution will be.

Bmw doubles · 02-23-2020, 03:15 PM

Other possible obvious spots. 02 sensors and MAF cleaning.

mfractal · 02-23-2020, 05:59 PM

Quote:

Originally Posted by badass335

i'm having the exact same issue. I also have MHD but my car is completely stock otherwise. New plugs were installed a few weeks ago at my dealer. Even before the plugs i noticed the the car would be idling, i'd get a single "jerk' or "stumble' randomly. it started happening about a month ago. i removed MHD completely and still had the "stumble". What i did notice was if i applied load to the car, (climbing a hill, put in 5th or 6th gear manual mode at a low speed and try to accelerate), the car would start to stumble and go into limp mode. the other thing i noticed was at slower speeds and lower rpms, even maintaining a speed at say 1500rpm, i could feel the random "stumble" here and there. I'm going to look at new coils, just because i haven't replaced them for over 100,000kms. Be interesting to hear what your resolution will be.

Yeah I'd check your coils. This high load low rpm misfire is usually plugs coils or fueling related.

NJQG · 02-24-2020, 06:42 PM

So a small update. I swapped plugs between 3 and 1. The problem followed the plug to 1. I believe what may have happened, was the bad injector somehow fouled up the new plug I put in. I'll find out for sure tomorrow if this works or not.

badass335 · 02-24-2020, 09:26 PM

Quote:

Originally Posted by mfractal

Yeah I'd check your coils. This high load low rpm misfire is usually plugs coils or fueling related.

New coils arrive on friday so will test. Hopefully it's not hpfp

ey2001 · 02-24-2020, 10:19 PM

Quote:

Originally Posted by NJQG

So a small update. I swapped plugs between 3 and 1. The problem followed the plug to 1. I believe what may have happened, was the bad injector somehow fouled up the new plug I put in. I'll find out for sure tomorrow if this works or not.

Nice! Hopefully that's the issue... because new plug went bad on me too...

95blkmax · 02-25-2020, 08:03 AM

Quote:

Originally Posted by NJQG

So a small update. I swapped plugs between 3 and 1. The problem followed the plug to 1. I believe what may have happened, was the bad injector somehow fouled up the new plug I put in. I'll find out for sure tomorrow if this works or not.

sweet! This is annoying but it's much better than you swapping the coil/plug and it STILL being on cyl3 lol. Best of luck!

NJQG · 02-25-2020, 09:16 AM

Quote:

Originally Posted by 95blkmax

sweet! This is annoying but it's much better than you swapping the coil/plug and it STILL being on cyl3 lol. Best of luck!

Thanks. I definitely hope this does the trick. I been driving my 9" lifted sierra so I've gotten really friendly with the local gas station.

BimmerHausPerformance · 02-26-2020, 06:07 PM

Nice, kinda a wide variety of cars you got there... nice.

badass335 · 02-28-2020, 06:33 PM

Did your issue get resolved? I installed new coils and all still having issues. And randomly getting Super Knock on cylinder 6 now too. Removed mhd and running stock but still getting misfires on cylinder 3. Moved coil and plug to cylinder 1 and still having misfire on cylinder 3. Might order new injectors and have bmw install them for me anyways.

NJQG · 02-29-2020, 01:36 PM

Quote:

Originally Posted by badass335

Did your issue get resolved? I installed new coils and all still having issues. And randomly getting Super Knock on cylinder 6 now too. Removed mhd and running stock but still getting misfires on cylinder 3. Moved coil and plug to cylinder 1 and still having misfire on cylinder 3. Might order new injectors and have bmw install them for me anyways.

Yea I finally got my issue resolved. After a the new injector the spark plug was still useless. After swapping in a new one all is well.

manleykeedan · 04-15-2020, 03:13 AM

Quote:

Originally Posted by NJQG

Car was running MHD stage 2 when it first started to get the misfire. Changed all the plugs as well as new coils. Problem still on cylinder 3. Next i figured maybe i'd try the fuel injector. Changed that and had it calibrated. Still same issue on cylinder 3. I also set the tune to stage 0. Just to see if it would by chance help it did not. I'm lost on what to do so any help or direction would be greatly appreciated. Car has intake, charge pipe, intercooler, and catless dp if that makes Speed Test Scrabble Word Finder Solitaire any difference.

i applied load to the car, (climbing a hill, put in 5th or 6th gear manual mode at a low speed and try to accelerate), the car would start to stumble and go into limp mode.

robinjamess · 03-27-2021, 02:09 PM

Quote:

Originally Posted by manleykeedan

i applied load to the car, (climbing a hill, put in 5th or 6th gear manual mode at a low speed and try to accelerate), the car would start to stumble and go into limp mode.
TcsWebmail DadeSchools Upsers

the other thing i noticed was at slower speeds and lower rpms, even maintaining a speed at say 1500rpm, i could feel the random "stumble" here and there.

badass335 · 03-27-2021, 02:15 PM

I use to have the same issue. Prelude to injector failure. I replaced all my injectors and problems went away. It is still possible yours may need a carbon clean depending in mileage but for me, new injectors and new plugs solved it.

02-22-2020, 10:30 PM	#1
NJQG Enlisted Member 33 Rep 38 Posts Drives: BMW Join Date: Feb 2013 Location: NJ iTrader: (0)	PLS Help F10 N55 constant misfire on cylinder 3 Car was running MHD stage 2 when it first started to get the misfire. Changed all the plugs as well as new coils. Problem still on cylinder 3. Next i figured maybe i'd try the fuel injector. Changed that and had it calibrated. Still same issue on cylinder 3. I also set the tune to stage 0. Just to see if it would by chance help it did not. I'm lost on what to do so any help or direction would be greatly appreciated. Car has intake, charge pipe, intercooler, and catless dp if that makes any difference. Attached Images
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02-22-2020, 11:49 PM	#4
Bmw doubles Dream crusher 984 Rep 2,421 Posts Drives: Fast Join Date: Mar 2015 Location: westside iTrader: (0) Garage List 2011 535 [0.00]	Did you tap your plugs down? Anywhere between .18 - .22 You can put in a gallon or 2 of e85 to calm the knock without any fuel upgrades. Don't go past 2 gallons if you don't have upgraded fueling hardware __________________ 535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI IG: @bmwdoubles
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02-23-2020, 03:58 AM	#5
mfractal VAG Survivor $mfractal's Avatar$ 40 Rep 150 Posts Drives: E90 335i Join Date: Aug 2015 Location: BR iTrader: (1)	Did you install new decoupler rings with the new injectors ? __________________ F10 535i LCI, Hybrid Turbo, Custom Inlet, Spool FX-150 Pump HPFP, TI Automotive LPFP, DV+, Phoenix IC, FTP CP, High Flow Cat, M5 Mufflers, Custom Tuned By David Shoup.
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02-23-2020, 01:35 PM	#9
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	i'm having the exact same issue. I also have MHD but my car is completely stock otherwise. New plugs were installed a few weeks ago at my dealer. Even before the plugs i noticed the the car would be idling, i'd get a single "jerk' or "stumble' randomly. it started happening about a month ago. i removed MHD completely and still had the "stumble". What i did notice was if i applied load to the car, (climbing a hill, put in 5th or 6th gear manual mode at a low speed and try to accelerate), the car would start to stumble and go into limp mode. the other thing i noticed was at slower speeds and lower rpms, even maintaining a speed at say 1500rpm, i could feel the random "stumble" here and there. I'm going to look at new coils, just because i haven't replaced them for over 100,000kms. Be interesting to hear what your resolution will be.
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02-23-2020, 03:15 PM	#10
Bmw doubles Dream crusher 984 Rep 2,421 Posts Drives: Fast Join Date: Mar 2015 Location: westside iTrader: (0) Garage List 2011 535 [0.00]	Other possible obvious spots. 02 sensors and MAF cleaning. __________________ 535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI IG: @bmwdoubles
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02-24-2020, 06:42 PM	#12
NJQG Enlisted Member 33 Rep 38 Posts Drives: BMW Join Date: Feb 2013 Location: NJ iTrader: (0)	So a small update. I swapped plugs between 3 and 1. The problem followed the plug to 1. I believe what may have happened, was the bad injector somehow fouled up the new plug I put in. I'll find out for sure tomorrow if this works or not.
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02-26-2020, 06:07 PM	#17
BimmerHausPerformance Major 513 Rep 1,442 Posts Drives: 2011 535i 6MT Join Date: Apr 2019 Location: Chattanooga iTrader: (1) Garage List 2011 BMW 535i [0.00]	Nice, kinda a wide variety of cars you got there... nice. __________________ 2011 F10 S55 6MT Website Insta @bimmerhausperformance YouTube
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02-28-2020, 06:33 PM	#18
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	Did your issue get resolved? I installed new coils and all still having issues. And randomly getting Super Knock on cylinder 6 now too. Removed mhd and running stock but still getting misfires on cylinder 3. Moved coil and plug to cylinder 1 and still having misfire on cylinder 3. Might order new injectors and have bmw install them for me anyways.
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03-27-2021, 02:15 PM	#22
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	I use to have the same issue. Prelude to injector failure. I replaced all my injectors and problems went away. It is still possible yours may need a carbon clean depending in mileage but for me, new injectors and new plugs solved it.
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