Still getting a misfire..

USJonny · 03-29-2020, 02:04 PM

Hey guys,

I've been getting a misfire in cylinder 1 and I replaced all spark plugs since it might've needed a tuneup anyway.
Still a misfire.

Replaced cylinder 1 coil hoping that would be the last of it, still a misfire.

Replaced cylinder 1 fuel injector, still a misfire.

Anybody know what the damn problem might be?

I have all index 8's and replaced cylinder 1 with an index 12, because I've seen a lot of people say they have no issues at all.

EDIT:
For about 3 days it has been fine, I've been doing pulls no problem and didn't get a misfire.
This morning I was heading back home and pushed on the gas a little bit and the service engine soon light came back on for pending misfire cylinder 1.

8303otte · 03-29-2020, 03:04 PM

you'd need all 6 as index 12 surely?

USJonny · 03-29-2020, 03:10 PM

Quote:

Originally Posted by 8303otte

you'd need all 6 as index 12 surely?

That's what I thought too, but seeing so many people go back and forth saying yes you do, and then also no you don't I just did cylinder 1 as index 12.
Because I've seen people mix 1-10's with index 12's and say they had no issues.

If there isn't any other logical reason then I'll just bite the bullet and do all index 12's and cry as my bank account drains.

relative4 · 03-29-2020, 09:49 PM

Smoke test, compression test, walnut blast

wrrush · 03-30-2020, 09:45 PM

Did you check the mosfets on ur msd and do you have the old msd80 and need to upgrade to msd81???

tomasp001 · 03-31-2020, 04:44 AM

Did you change the adaptations for your new injector?

type-dRew · 03-31-2020, 02:23 PM

Quote:

Originally Posted by wrrush

Did you check the mosfets on ur msd and do you have the old msd80 and need to upgrade to msd81???

his profile shows 2011 335is, his dme should be fine if thats accurate

wrrush · 04-01-2020, 01:27 PM

you never know, could have bought a diff car so just giving a diff perspective

J0hnct78 · 04-01-2020, 07:20 PM

I recently purchased mine, and it was having misfires. I did the walnut blast and haven't had an issue since.

03-29-2020, 02:04 PM	#1
USJonny New Member 0 Rep 6 Posts Drives: 2011 335is Coupe Join Date: Feb 2020 Location: Clarksville, TN iTrader: (0)	Still getting a misfire.. Hey guys, I've been getting a misfire in cylinder 1 and I replaced all spark plugs since it might've needed a tuneup anyway. Still a misfire. Replaced cylinder 1 coil hoping that would be the last of it, still a misfire. Replaced cylinder 1 fuel injector, still a misfire. Anybody know what the damn problem might be? I have all index 8's and replaced cylinder 1 with an index 12, because I've seen a lot of people say they have no issues at all. EDIT: For about 3 days it has been fine, I've been doing pulls no problem and didn't get a misfire. This morning I was heading back home and pushed on the gas a little bit and the service engine soon light came back on for pending misfire cylinder 1. Last edited by USJonny; 03-29-2020 at 02:11 PM..
	Appreciate 0 Tweet Quote

03-29-2020, 03:04 PM	#2
8303otte New Member 2 Rep 26 Posts Drives: BMW 325i E90 Join Date: Feb 2020 Location: South Wales iTrader: (0)	you'd need all 6 as index 12 surely?
	Appreciate 0 Quote

03-29-2020, 09:49 PM	#4
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	Smoke test, compression test, walnut blast
	Appreciate 0 Quote

03-30-2020, 09:45 PM	#5
wrrush Second Lieutenant 24 Rep 213 Posts Drives: 2007 335xi Join Date: Jun 2011 Location: Maryland iTrader: (1)	Did you check the mosfets on ur msd and do you have the old msd80 and need to upgrade to msd81???
	Appreciate 0 Quote

03-31-2020, 04:44 AM	#6
tomasp001 Private First Class 11 Rep 106 Posts Drives: 2008 BMW 335i Join Date: Nov 2019 Location: Scarborough, ON, Canada iTrader: (0) Garage List 2008 BMW 335i [0.00]	Did you change the adaptations for your new injector? __________________ __________________ '08 335i AT Titanium Silver \| MHD Stage 2+ (91 oct) \| xHP Stage 3 \| VRSF FMIC [7.5"] \| BMS CP + Tial BOV \| VRSF Catless DP \| VRSF Exhaust [Street] \| BMS Dual Cone CAI \| BMS Cowl Filters \| Bilstein B8 Struts+Eibach Lowering Springs \|
	Appreciate 0 Quote

04-01-2020, 01:27 PM	#8
wrrush Second Lieutenant 24 Rep 213 Posts Drives: 2007 335xi Join Date: Jun 2011 Location: Maryland iTrader: (1)	you never know, could have bought a diff car so just giving a diff perspective
	Appreciate 0 Quote

04-01-2020, 07:20 PM	#9
J0hnct78 New Member 0 Rep 27 Posts Drives: 2007 BMW 335i E93 Join Date: Jan 2020 Location: Corvallis, Oregon iTrader: (0)	I recently purchased mine, and it was having misfires. I did the walnut blast and haven't had an issue since.
	Appreciate 0 Quote