Help 2009 335i starts sputtering and shaking on start up

SmokeyN54 · 05-05-2020, 04:07 AM

I recently removed my c@ts and added a chargepipe as well as a catback and flashed on the mhd stage 2 tune. I noticed right after that when the car is started up warm or if it sits after it warms up from a cold start its starts to sputter a shake violently then it settles down and revs a little higher about 100-200 rpm higher then idles and drives perfectly fine.

This all happened all of a sudden and was wondering whether it was my tune or if it was the downpipes that are causing all this.

mweisdorfer · 05-05-2020, 05:51 PM

Quote:

Originally Posted by SmokeyN54

I recently removed my c@ts and added a chargepipe as well as a catback and flashed on the mhd stage 2 tune. I noticed right after that when the car is started up warm or if it sits after it warms up from a cold start its starts to sputter a shake violently then it settles down and revs a little higher about 100-200 rpm higher then idles and drives perfectly fine.

This all happened all of a sudden and was wondering whether it was my tune or if it was the downpipes that are causing all this.

Do a walnut blast

335e92tx · 05-05-2020, 06:05 PM

number of miles?

Last time it has coils or plugs? ?

get ready for$..start with those 3

Smgs1992 · 05-05-2020, 07:11 PM

Well it's misfiring. Figure out where. If you haven't do plugs and coils. See if there's any gas or oil on the plugs. Look up the maintenance on these cars or your gonna keep having problems

SmokeyN54 · 05-05-2020, 10:08 PM

The mileage on the car is about 70k and it got coils and plugs a couple thousand miles back, I've heard it could be the hpfp but I dont get any other problems on the road or when pushing it hard. I'll get the plugs checked out soon though.

335e92tx · 05-05-2020, 10:53 PM

Quote:

Originally Posted by SmokeyN54

. I'll get the plugs checked out soon though.

Rotate coils and plgs around until you can pin down a cyl.. Thats the way it works.

SmokeyN54 · 05-06-2020, 02:46 AM

Alright thanks for the tips I'll update what happens when I take a look at the coils and plugs.

iqraceworks · 05-06-2020, 06:58 AM

Quote:

Originally Posted by mweisdorfer

Do a walnut blast

Could be coils, could be plugs, could be leaking injector(s)

Do a little troubleshooting.......better get used to it on these cars

SmokeyN54 · 05-26-2020, 10:17 PM

Figured out what was wrong, I had the O2 sensors plugged in "wrong" resulting in them freaking out

05-05-2020, 04:07 AM	#1
SmokeyN54 New Member 2 Rep 8 Posts Drives: bmw 335i Join Date: Mar 2020 Location: Los Angeles iTrader: (0)	Help 2009 335i starts sputtering and shaking on start up I recently removed my c@ts and added a chargepipe as well as a catback and flashed on the mhd stage 2 tune. I noticed right after that when the car is started up warm or if it sits after it warms up from a cold start its starts to sputter a shake violently then it settles down and revs a little higher about 100-200 rpm higher then idles and drives perfectly fine. This all happened all of a sudden and was wondering whether it was my tune or if it was the downpipes that are causing all this.
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05-05-2020, 06:05 PM	#3
335e92tx ahat 1046 Rep 2,592 Posts Drives: Was '07-335e92 - Now '13-335IS Join Date: Mar 2008 Location: Texas iTrader: (6)	number of miles? Last time it has coils or plugs? ? get ready for$..start with those 3 __________________ '13 335IS N54 (1 of 373 LeMans Blue out of 3597 total production e92)- Grey interior (1 of 24 in LMB with any trans- 1 of 14 with DCT)-MODS -MFactory LSD/MHD-BQ custom Tune/ATM-IC/AFE Momentum GT Intake/Konis/Mfront&HeimJoint Rear rods&arms/Brembos. https://photos.app.goo.gl/Lo6aHZRo7XqtPkhL8
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05-05-2020, 07:11 PM	#4
Smgs1992 Captain 721 Rep 946 Posts Drives: 2007 bmw 335i Join Date: Apr 2020 Location: Cincinnati ohio iTrader: (0)	Well it's misfiring. Figure out where. If you haven't do plugs and coils. See if there's any gas or oil on the plugs. Look up the maintenance on these cars or your gonna keep having problems __________________ 07 E92 335i 6MT, MMP inlets, DCI, VRSF 7.5 competition intercooler, VRSF catless downpipes, VRSF chargepipe, 335is clutch, Vader Solutions stage 2 LPFP, MHD stage 2+, Hawk HPS 5.0 pads, R1 Concepts drilled slotted rotors, TSW Nurburgring 19x8 19x9.5
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05-05-2020, 10:08 PM	#5
SmokeyN54 New Member 2 Rep 8 Posts Drives: bmw 335i Join Date: Mar 2020 Location: Los Angeles iTrader: (0)	The mileage on the car is about 70k and it got coils and plugs a couple thousand miles back, I've heard it could be the hpfp but I dont get any other problems on the road or when pushing it hard. I'll get the plugs checked out soon though.
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05-06-2020, 02:46 AM	#7
SmokeyN54 New Member 2 Rep 8 Posts Drives: bmw 335i Join Date: Mar 2020 Location: Los Angeles iTrader: (0)	Alright thanks for the tips I'll update what happens when I take a look at the coils and plugs.
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05-26-2020, 10:17 PM	#9
SmokeyN54 New Member 2 Rep 8 Posts Drives: bmw 335i Join Date: Mar 2020 Location: Los Angeles iTrader: (0)	Figured out what was wrong, I had the O2 sensors plugged in "wrong" resulting in them freaking out
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