Misfire issues on BMW 2015 328i n20 HELP

Okhan19 · 05-27-2018, 10:22 AM

So i have been having a misfire issue on my car. Started with cylinder 1 so change coil, issue seemed to have been solved. Few days later cylinder 4 misfire so i change all the coils. Car drives fine for two days under heavy throttle misfire issue comes up on cylinder 2. So i change all the plugs and injectors. After doing this again car drives fine for a few days and then misfire issue comes up on cylinder 3. Things to note if idling no issue at all, the misfire issue only comes up under load. Do you really need to recode injectors after they are installed? If it is not the coils, plugs or injectors then what? I have a tune @20lbs, downpipe, atm intercooler. The issue started to happen after a long out of town drive and i filled up with gas. Note I had the tune and modifications on the car for about a month without issue so I kinda doubt it is the tune.

2000Z3M · 05-27-2018, 11:05 AM

still on the same tank of gas? might be bad fuel

sspade · 05-27-2018, 11:15 AM

Strange, indeed.

Do you have a Flash tune or Piggyback? I would try unplugging tune / flashing back to stock at this point...

Interested to hear other opinions on what could be causing this N20 to misfire under load (assuming its not the tune).

Okhan19 · 05-27-2018, 03:33 PM

@2000Z3M filled up twice from half tank since then. Just added a fuel treatment will see how this goes. I am thinking about changing the HPFP but not sure?

Big Mexican Women · 05-27-2018, 10:16 PM

It sounds exactly like a faulty ignition coil issue, which is very strange considering you've changed the coils as well. try swapping the coil on the misfiring cylinder and see if the misfire code changes to a different cylinder.

it could also be an issue with your plugs, such as incorrect part number, improper gapping, etc.

Okhan19 · 05-28-2018, 02:05 PM

Hey Mex so i changed the coil from cylinder 3 (no misfire code) to cylinder 1 (had misfire code) and put in another new coil I purchased and started to get a misfire code in cylinder 3 consistently under load. No misfire on cylinder 1. Coil part number is 8616153, just changed that coil again to an older one I had. Will test and see.

jackdo · 05-28-2018, 02:37 PM

change the sparkplugs yet? i was having a similar issue. Also maybe its a bad PCV valve. I would recommend go to the dealer and let them do the check thats what i had to do when mine was misfiring.

Kailec · 05-28-2018, 02:46 PM

I feel like you've covered most things it could be. Your best bet maybe at this point is to see a mechanic or dealership.

f30modern · 05-29-2018, 03:57 AM

I had a similar issue, turned out there was a crack in the turbo on my n20. The cost was like $500 parts and labor. I thought it was the MAF sensor but that was good. Spark plugs and ignition coils were fine. Find a local Indy to get a second opinion.

Okhan19 · 05-31-2018, 10:17 PM

Check the boost levels and it seems fine so it appears it is not a crack turbo either. Start to wonder if i received defective coils.

Big Mexican Women · 05-31-2018, 10:21 PM

Quote:

Originally Posted by Okhan19

Check the boost levels and it seems fine so it appears it is not a crack turbo either. Start to wonder if i received defective coils.

doubt it. I'm thinking it's an injector issue. there really isnt anything else I can think of that would be causing a misfire.

maybe find a mechanic for his opinion?

jparnes1 · 06-01-2018, 08:34 AM

YES YES YES you need to code the new injectors. They all have different flow rates. You probably shouldn't even be driving it without coding first.

Okhan19 · 06-23-2018, 03:38 PM

Well seemed to solve the problem. Firstly on the f30 n20 if you using the same part number for the injectors it does not need to be coded. The issue seemed to have been related to the fuel not sure if it was water or the additive (boostane) i added. I used a can of red line s1 and add fuel from a different gas station brought it to the dealer and they indicated all was well. No more misfires for the past two weeks now.

Kailec · 06-23-2018, 05:48 PM

Interesting. So if I use non-OEM injectors I have to code it? How does the coding work exactly, and I'm assuming they have to all be the same brand and model?

Okhan19 · 06-25-2018, 05:17 PM

Not really non-oem but if the flow rates are different then in essence the computer has to be reprogrammed to accommodate for this.

juld0zer · 06-27-2018, 07:04 AM

Another issue to be aware of is using the wrong injectors.
eg. Fitting Euro 6 injectors to an engine/DME/car that requires Euro 5 injectors.
ISTA has a service function that will determine what type to fit.

Sea-Tac · 06-27-2018, 10:08 AM

Quote:

Originally Posted by jparnes1

YES YES YES you need to code the new injectors. They all have different flow rates. You probably shouldn't even be driving it without coding first.

Exactly right!!!!!!

tronkis10 · 01-05-2021, 10:22 AM

Can anyone help I have misfire cylinder 2 l Bmw F30 2012 I changed the coil & fuel injector coded it plus changed all 4 spark plugs and still same rough idle & shaking plus drivetrain malfunctioning idk what step take after this.

Luverse · 01-05-2021, 06:05 PM

Quote:

Originally Posted by tronkis10

Can anyone help I have misfire cylinder 2 l Bmw F30 2012 I changed the coil & fuel injector coded it plus changed all 4 spark plugs and still same rough idle & shaking plus drivetrain malfunctioning idk what step take after this.

Compression test

tronkis10 · 01-05-2021, 07:33 PM

I already did it too and they all close to 200 except cylinder 2 it like 190

knsair · 04-29-2021, 12:51 PM

Quote:

Originally Posted by Okhan19

Well seemed to solve the problem. Firstly on the f30 n20 if you using the same part number for the injectors it does not need to be coded. The issue seemed to have been related to the fuel not sure if it was water or the additive (boostane) i added. I used a can of red line s1 and add fuel from a different gas station brought it to the dealer and they indicated all was well. No more misfires for the past two weeks now.

Hi Okhan19, i'm having same issue , i replaced spark plugs and injectors with coding plus added fuel injector cleaner to fuel , tried a different coil from my friend still same issue !
so you issue was related to fuel

DG330 · 05-01-2021, 05:16 AM

Quote:

Originally Posted by tronkis10

I already did it too and they all close to 200 except cylinder 2 it like 190

Did you run the compression test with WOT and all plugs out? Also was the engine warm or cold?

I'm going to do mine at some point to get a baseline of how the engine is.

I thought 10% differences was ok between cylinders

05-27-2018, 10:22 AM	#1
Okhan19 Enlisted Member 26 Rep 40 Posts Drives: 328I 2015 ATM rktune downpipe Join Date: Apr 2018 Location: Jamaica iTrader: (0)	Misfire issues on BMW 2015 328i n20 HELP So i have been having a misfire issue on my car. Started with cylinder 1 so change coil, issue seemed to have been solved. Few days later cylinder 4 misfire so i change all the coils. Car drives fine for two days under heavy throttle misfire issue comes up on cylinder 2. So i change all the plugs and injectors. After doing this again car drives fine for a few days and then misfire issue comes up on cylinder 3. Things to note if idling no issue at all, the misfire issue only comes up under load. Do you really need to recode injectors after they are installed? If it is not the coils, plugs or injectors then what? I have a tune @20lbs, downpipe, atm intercooler. The issue started to happen after a long out of town drive and i filled up with gas. Note I had the tune and modifications on the car for about a month without issue so I kinda doubt it is the tune.
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05-27-2018, 11:05 AM	#2
2000Z3M Captain 640 Rep 847 Posts Drives: 2016 435i ZHP Join Date: Dec 2008 Location: IL iTrader: (0)	still on the same tank of gas? might be bad fuel
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05-27-2018, 11:15 AM	#3
sspade Major General 2476 Rep 5,460 Posts Drives: F30 Join Date: Oct 2017 Location: Stevenson, WA iTrader: (3) Garage List 2016 BMW 320i [7.87] 2014 BMW 328i [6.83]	Strange, indeed. Do you have a Flash tune or Piggyback? I would try unplugging tune / flashing back to stock at this point... Interested to hear other opinions on what could be causing this N20 to misfire under load (assuming its not the tune).
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05-27-2018, 03:33 PM	#4
Okhan19 Enlisted Member 26 Rep 40 Posts Drives: 328I 2015 ATM rktune downpipe Join Date: Apr 2018 Location: Jamaica iTrader: (0)	@2000Z3M filled up twice from half tank since then. Just added a fuel treatment will see how this goes. I am thinking about changing the HPFP but not sure?
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05-27-2018, 10:16 PM	#5
Big Mexican Women Banned 102 Rep 343 Posts Drives: 2011 528i Join Date: May 2018 Location: GTA iTrader: (0)	It sounds exactly like a faulty ignition coil issue, which is very strange considering you've changed the coils as well. try swapping the coil on the misfiring cylinder and see if the misfire code changes to a different cylinder. it could also be an issue with your plugs, such as incorrect part number, improper gapping, etc.
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05-28-2018, 02:05 PM	#6
Okhan19 Enlisted Member 26 Rep 40 Posts Drives: 328I 2015 ATM rktune downpipe Join Date: Apr 2018 Location: Jamaica iTrader: (0)	Hey Mex so i changed the coil from cylinder 3 (no misfire code) to cylinder 1 (had misfire code) and put in another new coil I purchased and started to get a misfire code in cylinder 3 consistently under load. No misfire on cylinder 1. Coil part number is 8616153, just changed that coil again to an older one I had. Will test and see.
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05-28-2018, 02:37 PM	#7
jackdo New Member 0 Rep 5 Posts Drives: 2012 f30 328i \| M3 wheels 18in Join Date: Apr 2018 Location: jamaica iTrader: (0)	change the sparkplugs yet? i was having a similar issue. Also maybe its a bad PCV valve. I would recommend go to the dealer and let them do the check thats what i had to do when mine was misfiring.
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05-28-2018, 02:46 PM	#8
Kailec Lieutenant Colonel 595 Rep 1,953 Posts Drives: 2013 328i xDrive Join Date: Apr 2017 Location: Toronto, ON iTrader: (0) Garage List 2013 328i xDrive [0.00]	I feel like you've covered most things it could be. Your best bet maybe at this point is to see a mechanic or dealership.
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05-29-2018, 03:57 AM	#9
f30modern Private First Class 57 Rep 151 Posts Drives: 2017 540i M sport Join Date: Oct 2017 Location: Virginia iTrader: (0) Garage List 2012 BMW 328i [0.00]	I had a similar issue, turned out there was a crack in the turbo on my n20. The cost was like $500 parts and labor. I thought it was the MAF sensor but that was good. Spark plugs and ignition coils were fine. Find a local Indy to get a second opinion.
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05-31-2018, 10:17 PM	#10
Okhan19 Enlisted Member 26 Rep 40 Posts Drives: 328I 2015 ATM rktune downpipe Join Date: Apr 2018 Location: Jamaica iTrader: (0)	Check the boost levels and it seems fine so it appears it is not a crack turbo either. Start to wonder if i received defective coils.
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06-01-2018, 08:34 AM	#12
jparnes1 Colonel 248 Rep 2,387 Posts Drives: 2016 340i, 2012 Z4 35i Join Date: Jan 2010 Location: NY iTrader: (1)	YES YES YES you need to code the new injectors. They all have different flow rates. You probably shouldn't even be driving it without coding first. __________________ 2016 340i XDrive, EBII/black, 6 MT, M Sport, Track Handling, Cold Weather, Tech, Lighting, Driver Assistance Plus. 2012 Z4 35i, ED 2/24/2012, Melbourne Red Metallic, Black Leather, Carbon Trim, 6MT, M Sport, CW, PP, PS, NAV, CA.
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06-23-2018, 03:38 PM	#13
Okhan19 Enlisted Member 26 Rep 40 Posts Drives: 328I 2015 ATM rktune downpipe Join Date: Apr 2018 Location: Jamaica iTrader: (0)	Well seemed to solve the problem. Firstly on the f30 n20 if you using the same part number for the injectors it does not need to be coded. The issue seemed to have been related to the fuel not sure if it was water or the additive (boostane) i added. I used a can of red line s1 and add fuel from a different gas station brought it to the dealer and they indicated all was well. No more misfires for the past two weeks now.
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06-23-2018, 05:48 PM	#14
Kailec Lieutenant Colonel 595 Rep 1,953 Posts Drives: 2013 328i xDrive Join Date: Apr 2017 Location: Toronto, ON iTrader: (0) Garage List 2013 328i xDrive [0.00]	Interesting. So if I use non-OEM injectors I have to code it? How does the coding work exactly, and I'm assuming they have to all be the same brand and model?
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06-25-2018, 05:17 PM	#15
Okhan19 Enlisted Member 26 Rep 40 Posts Drives: 328I 2015 ATM rktune downpipe Join Date: Apr 2018 Location: Jamaica iTrader: (0)	Not really non-oem but if the flow rates are different then in essence the computer has to be reprogrammed to accommodate for this.
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06-27-2018, 07:04 AM	#16
juld0zer Lieutenant Colonel 482 Rep 1,600 Posts Drives: Prev 135i 7DCT, Now 130i 6sp Join Date: Jul 2016 Location: 2153 iTrader: (0)	Another issue to be aware of is using the wrong injectors. eg. Fitting Euro 6 injectors to an engine/DME/car that requires Euro 5 injectors. ISTA has a service function that will determine what type to fit.
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01-05-2021, 10:22 AM	#18
tronkis10 Registered 0 Rep 2 Posts Drives: Bmw f30 328i 2012 Join Date: Jan 2021 Location: Chicago IL iTrader: (0)	Can anyone help I have misfire cylinder 2 l Bmw F30 2012 I changed the coil & fuel injector coded it plus changed all 4 spark plugs and still same rough idle & shaking plus drivetrain malfunctioning idk what step take after this.
	Appreciate 0 Quote

01-05-2021, 07:33 PM	#20
tronkis10 Registered 0 Rep 2 Posts Drives: Bmw f30 328i 2012 Join Date: Jan 2021 Location: Chicago IL iTrader: (0)	I already did it too and they all close to 200 except cylinder 2 it like 190
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