Hesitant/Stuttering 335i

norman1979 · 03-11-2013, 07:19 AM

Upon driving the 335i over the weekend, I noticed that it was hesitant when accelerating between around 2k-3k revs in all gears. Its an Auto - not sure if that makes any difference.
No engine management light on the On Board Computer.

Any ideas? Im thinking possibly MAF sensor

doughboy · 03-11-2013, 07:45 AM

N54's don't have a MAF, so you can be confident it's not that!

Have you not run it for a while? Different fuel? Maybe go for a blast and see if it clears up?

C.J · 03-11-2013, 07:57 AM

Plugs / injectors? Carbon build up?

phil200tdi · 03-11-2013, 07:58 AM

Sounds like a misfire but could also be Vanos solenoids.

Any codes?

NH335i · 03-11-2013, 08:07 AM

Mine does that somehwhat.
I just attributed to being in regular "econ" drive mode rather than sport or "m" mode.

norman1979 · 03-11-2013, 08:50 AM

Its only driven occasionally but it was last driven around a week ago. I took it for a blast yesterday hoping that it would clear up but it didn't.
Surely the plugs/injectors would show up the engine management light?

Weird thing is that its fine when revving in Manual Mode.

doughboy · 03-11-2013, 09:56 AM

Engine lights will only show when misfires are significant, so it has to be quite bad for that to happen.

There is a auto gearbox adaptation reset procedure that i've seen on here somewhere, maybe try that?

impys · 03-13-2013, 07:24 AM

Quote:

Originally Posted by norman1979

Upon driving the 335i over the weekend, I noticed that it was hesitant when accelerating between around 2k-3k revs in all gears. Its an Auto - not sure if that makes any difference.
No engine management light on the On Board Computer.

Any ideas? Im thinking possibly MAF sensor

Mine did this a few weeks ago so took to into BMW, they changed the High Pressure Fuel Pump...luckily under warranted

Before that they changed the injectors under a past recall that had not been done

norman1979 · 03-18-2013, 05:07 AM

I tried the gearbox reset adaption and it seemed like it fixed it at first but stuttering returned later but now it is more intermittent
I haven't had a chance to get it diagnosed it but I have also noticed that the heaters are working intermittently. The climate control panel works as normal but the heaters just stop and start working randomly.
Perhaps the stuttering and the heater issue could be linked?

Josh1a1h · 03-18-2013, 06:06 AM

Good luck getting this sorted mate.

03-11-2013, 07:19 AM	#1
norman1979 Private First Class 13 Rep 140 Posts Drives: V8 M3 Join Date: Apr 2011 Location: London iTrader: (0)	Hesitant/Stuttering 335i Upon driving the 335i over the weekend, I noticed that it was hesitant when accelerating between around 2k-3k revs in all gears. Its an Auto - not sure if that makes any difference. No engine management light on the On Board Computer. Any ideas? Im thinking possibly MAF sensor Last edited by norman1979; 03-11-2013 at 07:30 AM..
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03-11-2013, 07:45 AM	#2
doughboy Major General 1545 Rep 8,970 Posts Drives: 2018 M2 Comp 6MT Join Date: Jan 2009 Location: UK iTrader: (2)	N54's don't have a MAF, so you can be confident it's not that! Have you not run it for a while? Different fuel? Maybe go for a blast and see if it clears up?
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03-11-2013, 07:57 AM	#3
C.J -_- 33 Rep 270 Posts Drives: 335i Join Date: Jan 2012 Location: UK iTrader: (0)	Plugs / injectors? Carbon build up?
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03-11-2013, 07:58 AM	#4
phil200tdi Colonel 112 Rep 2,621 Posts Drives: 335i M Sport E90 LCI manual Join Date: Jan 2011 Location: Aylesbury iTrader: (1)	Sounds like a misfire but could also be Vanos solenoids. Any codes? __________________ Car: e91 330d with Viezu map Gone but not forgotten: 2010 Jaguar XFR (Cat-back exhaust, pulley, intake mods and map), Highly Modified E90 335i LCI M Sport Manual (circa 480BHP/500lb ft)
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03-11-2013, 08:07 AM	#5
NH335i First Lieutenant 9 Rep 302 Posts Drives: 335i Join Date: Dec 2012 Location: NH iTrader: (0) Garage List 2007 335i [0.00]	Mine does that somehwhat. I just attributed to being in regular "econ" drive mode rather than sport or "m" mode.
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03-11-2013, 08:50 AM	#6
norman1979 Private First Class 13 Rep 140 Posts Drives: V8 M3 Join Date: Apr 2011 Location: London iTrader: (0)	Its only driven occasionally but it was last driven around a week ago. I took it for a blast yesterday hoping that it would clear up but it didn't. Surely the plugs/injectors would show up the engine management light? Weird thing is that its fine when revving in Manual Mode.
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03-11-2013, 09:56 AM	#7
doughboy Major General 1545 Rep 8,970 Posts Drives: 2018 M2 Comp 6MT Join Date: Jan 2009 Location: UK iTrader: (2)	Engine lights will only show when misfires are significant, so it has to be quite bad for that to happen. There is a auto gearbox adaptation reset procedure that i've seen on here somewhere, maybe try that?
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03-18-2013, 05:07 AM	#9
norman1979 Private First Class 13 Rep 140 Posts Drives: V8 M3 Join Date: Apr 2011 Location: London iTrader: (0)	I tried the gearbox reset adaption and it seemed like it fixed it at first but stuttering returned later but now it is more intermittent I haven't had a chance to get it diagnosed it but I have also noticed that the heaters are working intermittently. The climate control panel works as normal but the heaters just stop and start working randomly. Perhaps the stuttering and the heater issue could be linked?
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03-18-2013, 06:06 AM	#10
Josh1a1h Banned 170 Rep 3,828 Posts Drives: AzuriteBlack 335i E92 Join Date: Aug 2011 Location: Central North to West London iTrader: (2)	Good luck getting this sorted mate.
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