Car sputters and misfires...New/ Plugs + Coils did not fix the issue.

ssgm1x · 09-03-2018, 12:30 PM

Hey guys, my car misfires/ sputters around 3200 rpm and I Replaced plugs and Coils with no luck.... Could this be a bad injector or a vacuum leak?
I also notice a slightly rough idle. How to troubleshoot this in ISTA ?

Datalog link below u see misfires at about 3200 rpm

https://datazap.me/u/ssgm1x/sputter-...log=0&data=3-5

warpeacelove · 09-04-2018, 07:18 PM

Change the injectors

ssgm1x · 09-04-2018, 07:27 PM

F10 N55. It starts to sputter around 3200rpm then clears up about 5000rpm. I pulled plugs and they all look great. No fuel smell either... To be sure , I replaced Plugs and Coils and it didn't resolve the issue.
How can I troubleshoot without a Check engine light? My datalogs show misfires at WOT.....
I have a BMW warranty but without a check engine light BMW isn't gonna do much for me.

Injectors? Vacuum leak ? HPFP? LPFP?
I don't want to throw parts at the car. How to troubleshoot this? Any suggestions?

AZ-MCRacer · 09-05-2018, 01:36 PM

Can you post the log or a link to it?

RMNB · 09-08-2018, 01:10 PM

Quote:

Originally Posted by ssgm1x

F10 N55. It starts to sputter around 3200rpm then clears up about 5000rpm. I pulled plugs and they all look great. No fuel smell either... To be sure , I replaced Plugs and Coils and it didn't resolve the issue.
How can I troubleshoot without a Check engine light? My datalogs show misfires at WOT.....
I have a BMW warranty but without a check engine light BMW isn't gonna do much for me.

Injectors? Vacuum leak ? HPFP? LPFP?
I don't want to throw parts at the car. How to troubleshoot this? Any suggestions?

Mine stumbles and bumbles at cold start...then stalls. I've heard Fuel pumps are a common issue. I'll have my guy check it out and post back. It does seem to do it early at a cold start and come to a quick stop at light for the stalling issue. Also it shakes at idle which is quite noticeable. Fuel pump(s) or injectors is my guess. We will find out soon enough. 14 F10 550i at 66 k now so ...

ssgm1x · 09-08-2018, 01:12 PM

Quote:

Originally Posted by 335xi Beast

Quote:

Originally Posted by ssgm1x

F10 N55. It starts to sputter around 3200rpm then clears up about 5000rpm. I pulled plugs and they all look great. No fuel smell either... To be sure , I replaced Plugs and Coils and it didn't resolve the issue.
How can I troubleshoot without a Check engine light? My datalogs show misfires at WOT.....
I have a BMW warranty but without a check engine light BMW isn't gonna do much for me.

Injectors? Vacuum leak ? HPFP? LPFP?
I don't want to throw parts at the car. How to troubleshoot this? Any suggestions?

Mine stumbles and bumbles at cold start...then stalls. I've heard Fuel pumps are a common issue. I'll have my guy check it out and post back. It does seem to do it early at a cold start and come to a quick stop at light for the stalling issue. Also it shakes at idle which is quite noticeable. Fuel pump(s) or injectors is my guess. We will find out soon enough. 14 F10 550i at 66 k now so ...

It's only common issue on the 2011 and older 535

ssgm1x · 09-08-2018, 01:13 PM

Quote:

Originally Posted by 335xi Beast

Quote:

Originally Posted by ssgm1x

F10 N55. It starts to sputter around 3200rpm then clears up about 5000rpm. I pulled plugs and they all look great. No fuel smell either... To be sure , I replaced Plugs and Coils and it didn't resolve the issue.
How can I troubleshoot without a Check engine light? My datalogs show misfires at WOT.....
I have a BMW warranty but without a check engine light BMW isn't gonna do much for me.

Injectors? Vacuum leak ? HPFP? LPFP?
I don't want to throw parts at the car. How to troubleshoot this? Any suggestions?

Mine stumbles and bumbles at cold start...then stalls. I've heard Fuel pumps are a common issue. I'll have my guy check it out and post back. It does seem to do it early at a cold start and come to a quick stop at light for the stalling issue. Also it shakes at idle which is quite noticeable. Fuel pump(s) or injectors is my guess. We will find out soon enough. 14 F10 550i at 66 k now so ...

Sounds like injectors

RMNB · 09-09-2018, 11:19 AM

Quote:

Originally Posted by ssgm1x

Sounds like injectors

What's the typical cost at an Indy for fuel injectors for a 2014 550i??

ssgm1x · 09-09-2018, 11:20 AM

Quote:

Originally Posted by 335xi Beast

Quote:

Originally Posted by ssgm1x

Sounds like injectors

What's the typical cost at an Indy for fuel injectors for a 2014 550i??

Good question. About $650 labor and $650 in parts.

RMNB · 09-09-2018, 11:24 AM

Quote:

Originally Posted by ssgm1x

Good question. About $650 labor and $650 in parts.

Great, thanks!

Bmw doubles · 09-09-2018, 11:40 AM

The stalling on cold starts has happened to me and the LPFP was the cause. Def see stucks solution using a Walbro LPFP

LPFP upgrade https://f10.5post.com/forums/showthread.php?t=1482665

Sputtering can occur on tuned cars, I've had that issue too, tap the plugs down to .20 or .21. Kiss MPGs goodbye. Also make sure to use OEM coils, I used Delphi and had a string of problems. Injectors on our cars are surprisingly durable unlike the N54 problems until it hit index 12 for the fix.

ey2001 · 09-09-2018, 12:01 PM

I'm in the planning to change out my coils... oem is Delphi no? When I was changing my plugs the oem coils said Delphi on it.

Bmw doubles · 09-09-2018, 12:12 PM

Quote:

Originally Posted by ey2001

I'm in the planning to change out my coils... oem is Delphi no? When I was changing my plugs the oem coils said Delphi on it.

Actually you're right. I got some off brand coils named Bremi. Huge mistake, get OEM

09-03-2018, 12:30 PM	#1
ssgm1x Captain 418 Rep 771 Posts Drives: 2020 M340i & 2018 M3 Join Date: Aug 2017 Location: Cherry hill ,NJ iTrader: (0)	Car sputters and misfires...New/ Plugs + Coils did not fix the issue. Hey guys, my car misfires/ sputters around 3200 rpm and I Replaced plugs and Coils with no luck.... Could this be a bad injector or a vacuum leak? I also notice a slightly rough idle. How to troubleshoot this in ISTA ? Datalog link below u see misfires at about 3200 rpm https://datazap.me/u/ssgm1x/sputter-...log=0&data=3-5 __________________ 2020 BMW M340ix Dravit Grey 2018 BMW M3 Alpine White
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09-04-2018, 07:18 PM	#2
warpeacelove Lieutenant 134 Rep 487 Posts Drives: 550i Join Date: Feb 2018 Location: NY iTrader: (6)	Change the injectors
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09-04-2018, 07:27 PM	#3
ssgm1x Captain 418 Rep 771 Posts Drives: 2020 M340i & 2018 M3 Join Date: Aug 2017 Location: Cherry hill ,NJ iTrader: (0)	F10 N55. It starts to sputter around 3200rpm then clears up about 5000rpm. I pulled plugs and they all look great. No fuel smell either... To be sure , I replaced Plugs and Coils and it didn't resolve the issue. How can I troubleshoot without a Check engine light? My datalogs show misfires at WOT..... I have a BMW warranty but without a check engine light BMW isn't gonna do much for me. Injectors? Vacuum leak ? HPFP? LPFP? I don't want to throw parts at the car. How to troubleshoot this? Any suggestions? __________________ 2020 BMW M340ix Dravit Grey 2018 BMW M3 Alpine White
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09-05-2018, 01:36 PM	#4
AZ-MCRacer First Lieutenant 306 Rep 332 Posts Drives: 2022 G82 M4, 2013 F10 N55 Join Date: Oct 2016 Location: Tempe, AZ iTrader: (0)	Can you post the log or a link to it? __________________ 2022 G82 M4 - Isle of Man Green w/Kyalami Carbon Bucket Seats - MST Intakes, SSR Downpipes, JB4, AWE Exhaust. 2013 F10 N55 (535i), Pure Stage 2, Fuel-It PI Platinum, Fuel-It Stage 2 LPFP, BootMod3, Custom Turbo Inlet, Custom Cary Jordan Tune, More.. SOLD! 1999 e36 M3 - Estoril Blue - Track Car - S54 Swapped
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09-09-2018, 11:40 AM	#11
Bmw doubles Dream crusher 983 Rep 2,421 Posts Drives: Fast Join Date: Mar 2015 Location: westside iTrader: (0) Garage List 2011 535 [0.00]	The stalling on cold starts has happened to me and the LPFP was the cause. Def see stucks solution using a Walbro LPFP LPFP upgrade https://f10.5post.com/forums/showthread.php?t=1482665 Sputtering can occur on tuned cars, I've had that issue too, tap the plugs down to .20 or .21. Kiss MPGs goodbye. Also make sure to use OEM coils, I used Delphi and had a string of problems. Injectors on our cars are surprisingly durable unlike the N54 problems until it hit index 12 for the fix. __________________ 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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09-09-2018, 12:01 PM	#12
ey2001 Captain 310 Rep 716 Posts Drives: F10 535i 6spd Join Date: Apr 2007 Location: la iTrader: (0)	I'm in the planning to change out my coils... oem is Delphi no? When I was changing my plugs the oem coils said Delphi on it. Attached Images
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