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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Jan-06-2018, 06:20:36 PM   #1
lemoose
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Default Stuttering Acceleration

When getting on the gas hard at RPMs where you can typically break traction, the car stutters/bucks HARD- as if the fuel is completely cut off for a fraction of a second. Then the gas kicks again and the cycle repeats itself until it smooths out around 5-6k. Same thing happens in second gear (albeit in a narrower RPM range) but never in N or any other forward gear

The issue became obvious last night. However, I had noticed in recent days the car would buck a bit when I got on the accelerator. I thought it was just my foot coming off the accelerator as I got pushed back into my seat.

-Spark Plugs and ignition coils have been replaced no more than 6 months ago
-no OBD codes
-tried switching to Alpha-N and the issue persists (so I assume not MAF related)
-Issue persists with traction control disabled


I tried reading engine errors through INPA (screenshot). But my INPA is in german (Mikes Easy BMW Tools Package) so I need some help translating as google search hasn't been much help.

Anyone have any ideas? All input is much appreciated.


Last edited by lemoose; Sat, Jan-06-2018 at 06:27:59 PM.
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Old Sat, Jan-06-2018, 06:23:57 PM   #2
Drewster
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Default Re: Stuttering Acceleration

There is no screenshot attached.
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Old Sat, Jan-06-2018, 06:28:35 PM   #3
lemoose
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Default Re: Stuttering Acceleration

Quote:
Originally Posted by Drewster View Post
There is no screenshot attached.
I put it in using insert image but for some reason it doesnt post. I hyperlinked it now though. Thanks!
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Old Sat, Jan-06-2018, 06:34:57 PM   #4
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Default Re: Stuttering Acceleration

http://www.m3forum.net/m3forum/showthread.php?t=457239

Looks like either clutch switch or gear position sensor issue
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Old Sun, Jan-07-2018, 05:45:21 AM   #5
mrgizmo04
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Default Re: Stuttering Acceleration

Dying fuel pump or fuel starvation?

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'85 528e 164k miles (sold)
'05 M3 6MT coupe

All DIY: 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, WPC rod bearings, Beyer driveshaft, full SS (SS stepped V1, catted S1, resonated S2, SS sport), Sachs clutch/flywheel, rear main, VANOS bullet proofing with anti-rattle, valve adjustment, cooling refresh, Ohlins R&T/Swift 448f 672r/GC street tops and camber plates, AFD E85 Proflex kit.

Happy to help with VANOS or any other DIY job around NorCal
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Old Sat, Jan-13-2018, 01:46:49 PM   #6
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Default Re: Stuttering Acceleration

Quote:
Originally Posted by Drewster View Post
http://www.m3forum.net/m3forum/showthread.php?t=457239

Looks like either clutch switch or gear position sensor issue
Why did you think so or how would this effect in your opinion?

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Old Sat, Jan-13-2018, 01:48:30 PM   #7
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Default Re: Stuttering Acceleration

I just installed a cae shifter and swapped from smg to mt. After that the car started doing similar thing for me as well.

So maybe the transmission related parts have to do something with this

Is your car mt or smg btw?

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Discussing Stuttering Acceleration in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)