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-   E39 M5 (1998-2003) (http://www.bimmerfest.com/forums/forumdisplay.php?f=109)
-   -   Acceleration issue (http://www.bimmerfest.com/forums/showthread.php?t=100264)

perrotpx 06-04-2005 08:34 AM

Acceleration issue
 
Hi, I am brand new in the BMW M5 world. I just acquired a mint M5 from 1999. It has only 45,000kms and was parked most of the time in a garage (the previous owner was a pilot for Gulf Air airline).

I checked the whole car through the local dealer and even did a main maintenance to be sure everything was ok on the car. They confirmed that the car was fine. However, I have one concern:

The acceleration is not frank and have little "holes" during smooth acceleration. Also, if I accelerate full throttle, I feel that the car does not give all the power it has. For instance, sometime, just by releasing the accelerator a little bit, more power is being delivered for a couple of second.

All filters have been changed, as well as all the spark plugs.

Does anyone have felt the same thing on their M5? I would really appreciate your help!

Thanks in advance to all of you!

Pascal

KevinM 06-04-2005 02:14 PM

That is definately NOT normal.

I'm not much of a mechanic, but perhaps your clutch is slipping...


Good luck!

TXE39 06-05-2005 11:28 AM

http://www.m5board.com

CE 06-06-2005 06:00 PM

Acceleration issues
 
Hey man...I'm new at this deal too having just bought a used 2000 M5. I have similar issues and suspect it is something electrical in may case as the same hessitation/irregularity can be felt/heard in neutral. IF you rev the engine slowly and detect no variability in response, it's likely the clutch...otherwise electrical in nature...just my 2 cents. Mine appears to be "missing" a bit...especially when first driven (prior to warm-up). Nobody else noticed this but me. When I get resolution, I'll post an update. Good luck.

Ce

polshrk 06-21-2005 12:58 PM

accel issues
 
It is your MAF. All the MY99 and MY00 had some issues with the Mass Air. See if you can get BMW to replace them for free or a small fee. If you remove them and clean them really good you might feel a difference, but best bet is to replace them.

goto www.m5board.com and search for MAF and you will find tons of info.

hope this helps

adam

EuroRocket 06-27-2005 11:10 PM

sounds like to me the clutch slipping.. but the MAF is a output sensor so even when u start the car, u might have problems.


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