Hesitation/sputter in high gear@low rpm on highway

triple35 · 02-01-2009, 01:20 PM

I brought my car into the dealer due to it hesitating and running like crap(idle- sputtering and barely running at random times) and they replaced the fuel pump. I'm wondering if they updated the software to the lag issue software as my car seems alot slower...?

Also my second question is i am having the same problem as before my new fuel pump- my car sputters at 2-3k rpms when i accel. in 4th-6th gear. It feels like either a fuel problem or someking of timing issue? Possibly even spark plugs but the car is throwing no codes.

Any one run into a similar issue? The fuel pump did not solve the sputtering at all.

And did my software get updated if my fuel pump was replaced?

triple35 · 03-09-2009, 09:58 AM

update it was my electronic fuel pump not the high pressure pump which was replaced the week before....

ilidon · 03-09-2009, 10:13 AM

Try using different gas. My previous car usually sputtered when I was using bp gas but when I went to shell it stopped. maybe a factor.

2kaccordocoupe · 03-09-2009, 01:06 PM

+1 on the shell 91 v-power.
IMHO it's the best gas for the N54.

triple35 · 03-30-2009, 09:13 AM

i do agree the BP gas does make the car run like crap!

Car seems to be running so much better on only shell/ QT gas.
thanks guys

ragingclue · 03-30-2009, 09:19 AM

Quote:

Originally Posted by triple35

I brought my car into the dealer due to it hesitating and running like crap(idle- sputtering and barely running at random times) and they replaced the fuel pump. I'm wondering if they updated the software to the lag issue software as my car seems alot slower...?

Also my second question is i am having the same problem as before my new fuel pump- my car sputters at 2-3k rpms when i accel. in 4th-6th gear. It feels like either a fuel problem or someking of timing issue? Possibly even spark plugs but the car is throwing no codes.

Any one run into a similar issue? The fuel pump did not solve the sputtering at all.

And did my software get updated if my fuel pump was replaced?

I have a similar issue, but not on acceleration. It's most obvious when I'm cruising at low RPM in high gear. It's not a bad sputter, but I can tell something is amiss....

JoosyJoos · 03-30-2009, 09:35 AM

I have this problem also. When I'm cruising on the highway say in 6th gear around 80mph and then floor it, it almost feels like the car shutters ever so slightly. At first I dismissed it as some sort of boost lag but the more it occurs the more I wonder about it. I did notice a difference switching gas but it's still there somewhat. In a way it almost feels like DSC is affecting the rear axle but obviously I'm not breaking any traction in 6th gear when I step on it... and it does it when DSC is off anyway. Hard to describe the problem.

triple35 · 03-30-2009, 09:55 AM

Quote:

Originally Posted by JoosyJoos

I have this problem also. When I'm cruising on the highway say in 6th gear around 80mph and then floor it, it almost feels like the car shutters ever so slightly. At first I dismissed it as some sort of boost lag but the more it occurs the more I wonder about it. I did notice a difference switching gas but it's still there somewhat. In a way it almost feels like DSC is affecting the rear axle but obviously I'm not breaking any traction in 6th gear when I step on it... and it does it when DSC is off anyway. Hard to describe the problem.

exactly what was happening to me. Only in high gears at low RPM's. Really annoying and the dealer kept claiming it was in my head until they finally figured out it was my electronic fuel pump then later they reprogrammed my computer with a different software. It wasnt the 29.2 but 46.5 or something in the 40's I cant remember the version.

Anyone else have this updated software that's not the 29.2?

I see your in athens where do you service your car? Take it to Global BMW they finally got mine right and might be able to fix yours the first time since they now used mine as the guinea pig.

triple35 · 03-30-2009, 04:31 PM

Quote:

Originally Posted by triple35

exactly what was happening to me. Only in high gears at low RPM's. Really annoying and the dealer kept claiming it was in my head until they finally figured out it was my electronic fuel pump then later they reprogrammed my computer with a different software. It wasnt the 29.2 but 46.5 or something in the 40's I cant remember the version.

Anyone else have this updated software that's not the 29.2?

I see your in athens where do you service your car? Take it to Global BMW they finally got mine right and might be able to fix yours the first time since they now used mine as the guinea pig.

correction it was 42.3 software...I have never heard of this ? whats the deal with this anyone know?

shaddai · 03-30-2009, 04:34 PM

Quote:

Originally Posted by triple35

correction it was 42.3 software...I have never heard of this ? whats the deal with this anyone know?

Typo. Probably 32.3, if that's even out yet.

JoosyJoos · 03-30-2009, 07:01 PM

Thanks, I'll have them take a look at it before it gets worse.

Neutrino45 · 03-30-2009, 07:51 PM

It's probably because you're driving in the wrong gear.

ragingclue · 03-31-2009, 09:01 AM

Quote:

Originally Posted by Neutrino45

It's probably because you're driving in the wrong gear.

Yeah who drives in 6th gear on the freeway?

triple35 · 04-02-2009, 12:23 PM

Quote:

Originally Posted by ragingclue

Yeah who drives in 6th gear on the freeway?

Yeah esp. at 80mph

shouldn't that be more like 3rd

Firedog335i · 04-02-2009, 01:04 PM

02-01-2009, 01:20 PM	#1
triple35 Private First Class 8 Rep 127 Posts Drives: 2007 AW 335i 6mt Join Date: Nov 2007 Location: atlanta, ga/ west palm beach,fl iTrader: (0)	Hesitation/sputter in high gear@low rpm on highway I brought my car into the dealer due to it hesitating and running like crap(idle- sputtering and barely running at random times) and they replaced the fuel pump. I'm wondering if they updated the software to the lag issue software as my car seems alot slower...? Also my second question is i am having the same problem as before my new fuel pump- my car sputters at 2-3k rpms when i accel. in 4th-6th gear. It feels like either a fuel problem or someking of timing issue? Possibly even spark plugs but the car is throwing no codes. Any one run into a similar issue? The fuel pump did not solve the sputtering at all. And did my software get updated if my fuel pump was replaced?
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03-09-2009, 09:58 AM	#2
triple35 Private First Class 8 Rep 127 Posts Drives: 2007 AW 335i 6mt Join Date: Nov 2007 Location: atlanta, ga/ west palm beach,fl iTrader: (0)	update it was my electronic fuel pump not the high pressure pump which was replaced the week before....
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03-09-2009, 10:13 AM	#3
ilidon Major 59 Rep 1,036 Posts Drives: F13 M6 Join Date: Dec 2008 Location: L.I., NY iTrader: (10) Garage List 2009 335i [7.00]	Try using different gas. My previous car usually sputtered when I was using bp gas but when I went to shell it stopped. maybe a factor. __________________ F13 ///M6 SMB/SO E92 ///M3 AW/FR- Sold E92 335i MB/BLK- Sold [IMG]http://www.bimmerpost.com/forums/attachment.php?attachmentid=133578 Last edited by ilidon; 03-09-2009 at 10:45 AM..
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03-09-2009, 01:06 PM	#4
2kaccordocoupe Brigadier General 1274 Rep 4,703 Posts Drives: Former ///M Driver Join Date: Nov 2008 Location: The 6ix iTrader: (2)	+1 on the shell 91 v-power. IMHO it's the best gas for the N54.
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03-30-2009, 09:13 AM	#5
triple35 Private First Class 8 Rep 127 Posts Drives: 2007 AW 335i 6mt Join Date: Nov 2007 Location: atlanta, ga/ west palm beach,fl iTrader: (0)	i do agree the BP gas does make the car run like crap! Car seems to be running so much better on only shell/ QT gas. thanks guys
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03-30-2009, 09:35 AM	#7
JoosyJoos Major 113 Rep 1,347 Posts Drives: 2011 335d Join Date: Apr 2007 Location: Atlanta, GA iTrader: (1) Garage List 2008 BMW 335i [0.00]	I have this problem also. When I'm cruising on the highway say in 6th gear around 80mph and then floor it, it almost feels like the car shutters ever so slightly. At first I dismissed it as some sort of boost lag but the more it occurs the more I wonder about it. I did notice a difference switching gas but it's still there somewhat. In a way it almost feels like DSC is affecting the rear axle but obviously I'm not breaking any traction in 6th gear when I step on it... and it does it when DSC is off anyway. Hard to describe the problem. __________________ 1997 M3 Coupe - BMWCCA I-Prepared #22 2006 M Roadster - 23,000 miles and slowly counting
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03-30-2009, 07:01 PM	#11
JoosyJoos Major 113 Rep 1,347 Posts Drives: 2011 335d Join Date: Apr 2007 Location: Atlanta, GA iTrader: (1) Garage List 2008 BMW 335i [0.00]	Thanks, I'll have them take a look at it before it gets worse. __________________ 1997 M3 Coupe - BMWCCA I-Prepared #22 2006 M Roadster - 23,000 miles and slowly counting
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03-30-2009, 07:51 PM	#12
Neutrino45 Major 62 Rep 1,452 Posts Drives: XXX Join Date: Aug 2008 Location: milky way iTrader: (2)	It's probably because you're driving in the wrong gear.
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04-02-2009, 01:04 PM	#15
Firedog335i Private First Class 7 Rep 144 Posts Drives: 2008 335i Join Date: Feb 2009 Location: California iTrader: (1) Garage List 2008 E90/335i [0.00]
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