A troubling situation

JaxD · 10-17-2020, 12:38 AM

alright so I've done my fair share of searching but have yet to diagnose a true cause for my problem yet. A few nights ago I took my 2013 BMW 335i xdrive for a little rip down the highway. I ended up pulling into a parking lot at noticed a very rough idle.

Basically the car sounds like its misfiring. However a few conditions have to be met; A) it only happens during idle. B) the car must be at at least 200° oil temp. and C) The car must have run for about 2 minutes.

The car is running a stage 2 tune and several bolt ons and a straight pipe including a catless DP. However even with the car tuned back to stock the problem persists. There's no loss of power, no code, and no CEL (one did appear when the tune was removed but threw no codes, not even for the o2 sensors) and has since disappeared. I'm taking it to get a diagnostic tomorrow and have already ordered new spark plugs which I'll be installing soon. I'll try and attach a video so you guys can hear for yourselves. The engine almost dies and seems to rev itself up to 750rpm to stay alive.

A video of the situation can be found here:

328iX · 10-17-2020, 01:39 AM

Spark plugs / Coil packs

Rockyca · 10-17-2020, 01:03 PM

Any codes?

bellguy · 10-17-2020, 02:52 PM

Deleted

JaxD · 10-17-2020, 06:36 PM

Quote:

Originally Posted by Rockyca

Any codes?

nope, nothing on the misfire counter, no codes, not even when the MAF is unplugged. The shop I took it to believes there's either bad fuel or something wrong with the tune, however when the tune was removed the problem persistsed.

aps · 10-19-2020, 03:50 PM

making a similar sound to when an injector on my wife's X3 (N55) failed. but there was white smoke coming out of the exhaust then. but the sound is eerily similar. just a thought

JaxD · 10-19-2020, 10:56 PM

Quote:

Originally Posted by aps

making a similar sound to when an injector on my wife's X3 (N55) failed. but there was white smoke coming out of the exhaust then. but the sound is eerily similar. just a thought

I'll probably look into new injectors, after running 3 tanks of injector cleaner with no luck I have a feeling ones malfunctioning and dumping extra fuel into the cylinder.

BWbimmer · 10-20-2020, 05:15 PM

Quote:

Originally Posted by aps

making a similar sound to when an injector on my wife's X3 (N55) failed. but there was white smoke coming out of the exhaust then. but the sound is eerily similar. just a thought

But you had some codes?
Generally a missfire leaves a code.

JaxD · 11-30-2020, 01:39 AM

just felt I should put an update here in case anyone ever runs across this issue, I went against the advice of every service center I visited and installed new spark plugs. The sp for cylinder 6 was badly damaged and following that the car idled better but not great. After a day of testing and hard driving I blew my charge pipe wide open right on the intake manifold connector. If you are suffering from this issue I advise inspecting your vacuum lines and intake system as I believe it may have been cracked which in turn damaged the spark plug as the engine dumped too much fuel for the air that was escaping the crack.[IMG]undefined[/IMG]

XxThe_RemedyXx · 12-01-2020, 03:26 PM

Quote:

Originally Posted by JaxD

just felt I should put an update here in case anyone ever runs across this issue, I went against the advice of every service center I visited and installed new spark plugs. The sp for cylinder 6 was badly damaged and following that the car idled better but not great. After a day of testing and hard driving I blew my charge pipe wide open right on the intake manifold connector. If you are suffering from this issue I advise inspecting your vacuum lines and intake system as I believe it may have been cracked which in turn damaged the spark plug as the engine dumped too much fuel for the air that was escaping the crack.[IMG]undefined[/IMG]

This happened to me as well. Blew an insulator straight off of an NGK spark plug. Swapped the plugs out to OEM Bosch plugs and all good now.

cfm56d7b · 12-02-2020, 08:26 PM

Quote:

Originally Posted by JaxD

just felt I should put an update here in case anyone ever runs across this issue, I went against the advice of every service center I visited and installed new spark plugs. The sp for cylinder 6 was badly damaged and following that the car idled better but not great. After a day of testing and hard driving I blew my charge pipe wide open right on the intake manifold connector. If you are suffering from this issue I advise inspecting your vacuum lines and intake system as I believe it may have been cracked which in turn damaged the spark plug as the engine dumped too much fuel for the air that was escaping the crack.[IMG]undefined[/IMG]

Just to confirm - the charge pipe was stock at all times? This is a classic issue of fuel mixture being incorrect for some reason (in this case the root cause is more clear).

techlogik · 12-03-2020, 11:36 AM

More like classic case of running stage 2 boost and causing damage to the stock parts and leaks...

DelawareBMW · 12-10-2020, 11:26 PM

My vote is with the tune. Tuning is great and can really allow these cars to tap into all that unharnessed power but when you start tuning your playing with the manufacturers specs and headaches start to occur. I would check the plugs, the coil packs, and the connections. Heating and cooling causes things to expand and contract and something could be funky/out of spec when she heats up. You could also try cleaning the Mass Airflow Sensor (MAF) typically found on the intake jutting out the side. I had a 2008 335i that has something similar happen and it ended up being a faulty MAF causing things to get all out of whack. Sounds like something at temp is causing either something in the ignition or ratios to be out of whack.

10-17-2020, 12:38 AM	#1
JaxD Probably fixing some broken shit 9 Rep 30 Posts Drives: 2013 BMW 328i xdrive Join Date: Jan 2019 Location: Colorado iTrader: (0)	A troubling situation alright so I've done my fair share of searching but have yet to diagnose a true cause for my problem yet. A few nights ago I took my 2013 BMW 335i xdrive for a little rip down the highway. I ended up pulling into a parking lot at noticed a very rough idle. Basically the car sounds like its misfiring. However a few conditions have to be met; A) it only happens during idle. B) the car must be at at least 200° oil temp. and C) The car must have run for about 2 minutes. The car is running a stage 2 tune and several bolt ons and a straight pipe including a catless DP. However even with the car tuned back to stock the problem persists. There's no loss of power, no code, and no CEL (one did appear when the tune was removed but threw no codes, not even for the o2 sensors) and has since disappeared. I'm taking it to get a diagnostic tomorrow and have already ordered new spark plugs which I'll be installing soon. I'll try and attach a video so you guys can hear for yourselves. The engine almost dies and seems to rev itself up to 750rpm to stay alive. A video of the situation can be found here: __________________ __________________ 2013 BMW 335i xdrive M Performance in Melbourne Red - Injen Intake, VRSF intercooler, VRSF Muffler/Resonator delete, VRSF catless downpipe, CTS charge pipes, SPEC stage 2 clutch, Bootmod3 Stage 2 91 Octane tune, Pure 750 turbocharger, Spool LPFP and HPFP, various carbon aero (One of these things is probably not working)
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10-17-2020, 01:39 AM	#2
328iX David 786 Rep 2,010 Posts Drives: 2015 328iX F31 Join Date: Nov 2018 Location: Temecula, CA iTrader: (0)	Spark plugs / Coil packs __________________ F31 Suspension guide & discussion
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10-17-2020, 01:03 PM	#3
Rockyca First Lieutenant 34 Rep 356 Posts Drives: 2016 340i M-Sport Join Date: Jan 2012 Location: Toronto iTrader: (1)	Any codes?
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10-17-2020, 02:52 PM	#4
bellguy Second Lieutenant 127 Rep 283 Posts Drives: BMW 2019 440I M sport Join Date: Jan 2020 Location: UK iTrader: (0)	Deleted
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10-19-2020, 03:50 PM	#6
aps Captain 336 Rep 963 Posts Drives: 2018 M3 ZCP Join Date: Apr 2016 Location: NC iTrader: (6)	making a similar sound to when an injector on my wife's X3 (N55) failed. but there was white smoke coming out of the exhaust then. but the sound is eerily similar. just a thought __________________ 2018 Azurite Black F80 M3 ZCP 2019 Phytonic Blue G05 X5 2013 Glacier Silver F30 335i (sold)
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11-30-2020, 01:39 AM	#9
JaxD Probably fixing some broken shit 9 Rep 30 Posts Drives: 2013 BMW 328i xdrive Join Date: Jan 2019 Location: Colorado iTrader: (0)	just felt I should put an update here in case anyone ever runs across this issue, I went against the advice of every service center I visited and installed new spark plugs. The sp for cylinder 6 was badly damaged and following that the car idled better but not great. After a day of testing and hard driving I blew my charge pipe wide open right on the intake manifold connector. If you are suffering from this issue I advise inspecting your vacuum lines and intake system as I believe it may have been cracked which in turn damaged the spark plug as the engine dumped too much fuel for the air that was escaping the crack.[IMG]undefined[/IMG] __________________ __________________ 2013 BMW 335i xdrive M Performance in Melbourne Red - Injen Intake, VRSF intercooler, VRSF Muffler/Resonator delete, VRSF catless downpipe, CTS charge pipes, SPEC stage 2 clutch, Bootmod3 Stage 2 91 Octane tune, Pure 750 turbocharger, Spool LPFP and HPFP, various carbon aero (One of these things is probably not working)
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12-03-2020, 11:36 AM	#12
techlogik Lieutenant Colonel 70 Rep 1,565 Posts Drives: 2020 M340i Dravit Grey Join Date: Dec 2006 Location: FL iTrader: (2)	More like classic case of running stage 2 boost and causing damage to the stock parts and leaks... __________________ 2020 M340i: Dravit Grey Mettalic. Loaded.
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12-10-2020, 11:26 PM	#13
DelawareBMW New Member 35 Rep 16 Posts Drives: 2016 X5 xDrive50i & 435i Sport Join Date: Sep 2020 Location: Coastal Delaware iTrader: (0)	My vote is with the tune. Tuning is great and can really allow these cars to tap into all that unharnessed power but when you start tuning your playing with the manufacturers specs and headaches start to occur. I would check the plugs, the coil packs, and the connections. Heating and cooling causes things to expand and contract and something could be funky/out of spec when she heats up. You could also try cleaning the Mass Airflow Sensor (MAF) typically found on the intake jutting out the side. I had a 2008 335i that has something similar happen and it ended up being a faulty MAF causing things to get all out of whack. Sounds like something at temp is causing either something in the ignition or ratios to be out of whack.
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