Misfire under boost

street 335i · 03-05-2020, 02:09 PM

2007 e92 335i
FbO
MHD stg2+
car will misfire when under boost, right now I think it is because of high boost and the bar sensor not being able to read it or maybe ignition. I bought precision raceworks coil kit and a 3.5bar sensor. Can anyone help me and tell me if this will finally fix my misfire problem

JM98 · 03-05-2020, 02:30 PM

99% of the time its coils. Install the precision raceworks kit and new plugs and you should be good to go. Do you have any logs?

E93Beast · 03-05-2020, 03:11 PM

Quote:

Originally Posted by street 335i

2007 e92 335i
FbO
MHD stg2+
car will misfire when under boost, right now I think it is because of high boost and the bar sensor not being able to read it or maybe ignition. I bought precision raceworks coil kit and a 3.5bar sensor. Can anyone help me and tell me if this will finally fix my misfire problem

What is "high" boost ?
What plugs are you running ?

street 335i · 03-10-2020, 02:23 PM

Quote:

Originally Posted by JM98

99% of the time its coils. Install the precision raceworks kit and new plugs and you should be good to go. Do you have any logs?

Installed the precision coils but misfire is still there

street 335i · 03-10-2020, 02:24 PM

Quote:

Originally Posted by CLEAN E93

Quote:

Originally Posted by street 335i

2007 e92 335i
FbO
MHD stg2+
car will misfire when under boost, right now I think it is because of high boost and the bar sensor not being able to read it or maybe ignition. I bought precision raceworks coil kit and a 3.5bar sensor. Can anyone help me and tell me if this will finally fix my misfire problem

What is "high" boost ?
What plugs are you running ?

Around 20 psi

type-dRew · 03-10-2020, 02:28 PM

did you install new plugs? any codes? are your plugs wet after its been sitting?

did you use die electric grease on the plug boots?

iqraceworks · 03-11-2020, 07:03 AM

New plugs, new coils......fixes 99.9% of all misfire issues. It's the first thing that should be done before you do any mods to your car.

03-05-2020, 02:09 PM	#1
street 335i Private First Class 17 Rep 110 Posts Drives: 335i Join Date: Feb 2019 Location: orange county CA iTrader: (0) Garage List 2007 bmw 335i [0.00]	Misfire under boost 2007 e92 335i FbO MHD stg2+ car will misfire when under boost, right now I think it is because of high boost and the bar sensor not being able to read it or maybe ignition. I bought precision raceworks coil kit and a 3.5bar sensor. Can anyone help me and tell me if this will finally fix my misfire problem
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03-05-2020, 02:30 PM	#2
JM98 Lieutenant 391 Rep 532 Posts Drives: 2009 135i Join Date: May 2016 Location: SoCal iTrader: (0)	99% of the time its coils. Install the precision raceworks kit and new plugs and you should be good to go. Do you have any logs?
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03-10-2020, 02:28 PM	#6
type-dRew Major 641 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	did you install new plugs? any codes? are your plugs wet after its been sitting? did you use die electric grease on the plug boots? __________________ 2009 335i xDrive AT / 177k+ miles PSP 750ic / Fuel-It! Stage 1 / BMS CP / Sutphin Tuning / RFP E50 11.61 @ 117.5 New setup; Covid 19Ts on RFP 93 + ARM inlets, dp, VTT cp and PSP outlets
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03-11-2020, 07:03 AM	#7
iqraceworks Brigadier General 2002 Rep 3,731 Posts Drives: 2007 335i Join Date: Aug 2019 Location: Missouri iTrader: (0)	New plugs, new coils......fixes 99.9% of all misfire issues. It's the first thing that should be done before you do any mods to your car. __________________ 2007 335i, BMS DCI, BMS Chargepipe w/Tial BOV, ARM Catless Downpipes, silicone inlets, Bilstein B12 Prokit Suspension, Whiteline subframe bushings, Front/Rear M3 control arms, G-Plus FMIC, Stage 2 LPFP, Custom E40 tune by Justin (V8Bait), xHP stage 3 transmission flash, RB Two Turbos....10.90 @ 128mph
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