Bimmerfest - BMW Forums

Bimmerfest - BMW Forums (
-   E39 M5 (1998-2003) (
-   -   Acceleration issue (

perrotpx 06-04-2005 07:34 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!


KevinM 06-04-2005 01:14 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 10:28 AM

CE 06-06-2005 05:00 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.


polshrk 06-21-2005 11:58 AM

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 and search for MAF and you will find tons of info.

hope this helps


EuroRocket 06-27-2005 10:10 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.

All times are GMT -7. The time now is 09:11 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms