AWD issue Help diagnose hesitation/skipping during acceleration

gqong · 08-26-2015, 11:52 AM

So it seems I am still getting hesitation when accelerating but I was able to narrow down the issue it seems to an AWD component or even the transfer case motor which I have been reading about quite a bit. So the car pretty much hesitates and skips during any type of acceleration leaving quite a crappy driving experience lately. I pulled fuses 26 (and 50 for wipers) and this disables pretty much AWD among a bunch of other stuff (lights on dashboard 4x4 DTC etc), but when in RWD like this the car drives perfectly. Has anyone had any experience with this or just replaced the transfer case servo motor and had the same/similar symptoms? I am considering pulling the front drive shaft as I read it is only 8 bolts and it seems most likely it will drive fine in RWD still.

Antetokounmpo · 08-27-2015, 10:12 AM

What are your tire sizes?

cmg5461 · 09-02-2015, 11:37 AM

I've pulled front drive shaft: it's easy. No code, traction control still works..

although traction control gets confused and slams the throttle closed after 0.5s+ of wheelspin. Not sure if that's how the RWD version performs.

I put the shaft back in a few weeks ago for autocross and she still drives fine.

matteblue3er · 09-14-2015, 09:43 AM

Quote:

Originally Posted by gqong

So it seems I am still getting hesitation when accelerating but I was able to narrow down the issue it seems to an AWD component or even the transfer case motor which I have been reading about quite a bit. So the car pretty much hesitates and skips during any type of acceleration leaving quite a crappy driving experience lately. I pulled fuses 26 (and 50 for wipers) and this disables pretty much AWD among a bunch of other stuff (lights on dashboard 4x4 DTC etc), but when in RWD like this the car drives perfectly. Has anyone had any experience with this or just replaced the transfer case servo motor and had the same/similar symptoms? I am considering pulling the front drive shaft as I read it is only 8 bolts and it seems most likely it will drive fine in RWD still.

What happens when you turn off DTC/traction control completely (hold DTC button for 10+ seconds)?

If you cannot replicate the issue, you most likely have bad wheel speed sensors or harnesses.

08-26-2015, 11:52 AM	#1
gqong Private 7 Rep 68 Posts Drives: F10 M5 & e92 335xi Join Date: Aug 2011 Location: Bay Area, CA iTrader: (0)	AWD issue Help diagnose hesitation/skipping during acceleration So it seems I am still getting hesitation when accelerating but I was able to narrow down the issue it seems to an AWD component or even the transfer case motor which I have been reading about quite a bit. So the car pretty much hesitates and skips during any type of acceleration leaving quite a crappy driving experience lately. I pulled fuses 26 (and 50 for wipers) and this disables pretty much AWD among a bunch of other stuff (lights on dashboard 4x4 DTC etc), but when in RWD like this the car drives perfectly. Has anyone had any experience with this or just replaced the transfer case servo motor and had the same/similar symptoms? I am considering pulling the front drive shaft as I read it is only 8 bolts and it seems most likely it will drive fine in RWD still. Last edited by gqong; 08-26-2015 at 12:24 PM..
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08-27-2015, 10:12 AM	#2
Antetokounmpo Brigadier General 1560 Rep 3,475 Posts Drives: E90 6MT FBO; '18 F150 Platinum Join Date: Jul 2013 Location: WI iTrader: (3) Garage List 2018 Ford F-150 Pla ... [0.00] 2008 BMW 335xi [0.00]	What are your tire sizes? __________________ 2008 335xi 6MT \| VRSF Catless DP \| VRSF 7" FMIC \| VRSF CP \| TIAL BOV \| DCI \| MHD 2+ BC Racing BR \| Stoptech 600 \| Firehawk Indy 500 255 Square \| Atric Altimax 225 Sq. 2018 F-150 Platinum 701A \| FX4 \| 3.5 EcoBeast
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09-02-2015, 11:37 AM	#3
cmg5461 First Lieutenant 76 Rep 315 Posts Drives: 2008 Deep Green 335xi 6MT Join Date: Sep 2014 Location: Falling Waters, WV iTrader: (1) Garage List 2008 BMW 335xi [0.00]	I've pulled front drive shaft: it's easy. No code, traction control still works.. although traction control gets confused and slams the throttle closed after 0.5s+ of wheelspin. Not sure if that's how the RWD version performs. I put the shaft back in a few weeks ago for autocross and she still drives fine. __________________
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