535d Intermittent Accelleration Problem
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My Ride: 535d Sport Carbon Black, Black Dakota leather, Media Package, Bluetooth, Bi-xenon headlamps, adaptive headlamps, auto dimming interior mirror, heated folding door mirrors, electric front seats with drivers memory, heated front seats, extended light package, sun protection glass, electrically adjustable steering column, automatic air conditioning.
Wonder if anyone can help, I have a 2005 535d which has been remapped by DMS and is exhibiting some very strange behaviour...
After the car has had a hard run (kick down up to about 80mph) the next time you kick down, the revs rise to 4000 rpm but the car refuses to accelerate, it just holds it?s revs.
After quite a bit of investigation by my local independent and a replacement changeover valve I had the car ECU flashed back to normal and the problem went away.
DMS came out a couple of weeks ago to reapply the remap and the problem is back ? I?m not sure what?s going on as I?ve had the remap since 2005 with no problems.
Any ideas?
After the car has had a hard run (kick down up to about 80mph) the next time you kick down, the revs rise to 4000 rpm but the car refuses to accelerate, it just holds it?s revs.
After quite a bit of investigation by my local independent and a replacement changeover valve I had the car ECU flashed back to normal and the problem went away.
DMS came out a couple of weeks ago to reapply the remap and the problem is back ? I?m not sure what?s going on as I?ve had the remap since 2005 with no problems.
Any ideas?
Thread Starter
Members
Joined: Oct 2005
Posts: 98
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From: London/Manchester, UK
My Ride: 535d Sport Carbon Black, Black Dakota leather, Media Package, Bluetooth, Bi-xenon headlamps, adaptive headlamps, auto dimming interior mirror, heated folding door mirrors, electric front seats with drivers memory, heated front seats, extended light package, sun protection glass, electrically adjustable steering column, automatic air conditioning.
No ideas?
DMS came up yesterday and checked the map and said it was OK - they thought it "could be" the MAF. Don't really want to change it if it's not gonna fix the problem....
DMS came up yesterday and checked the map and said it was OK - they thought it "could be" the MAF. Don't really want to change it if it's not gonna fix the problem....
Originally Posted by Mambo' post='1028336' date='Oct 9 2009, 11:48 AM
Wonder if anyone can help, I have a 2005 535d which has been remapped by DMS and is exhibiting some very strange behaviour...
After the car has had a hard run (kick down up to about 80mph) the next time you kick down, the revs rise to 4000 rpm but the car refuses to accelerate, it just holds it?s revs.
After quite a bit of investigation by my local independent and a replacement changeover valve I had the car ECU flashed back to normal and the problem went away.
DMS came out a couple of weeks ago to reapply the remap and the problem is back ? I?m not sure what?s going on as I?ve had the remap since 2005 with no problems.
Any ideas?
After the car has had a hard run (kick down up to about 80mph) the next time you kick down, the revs rise to 4000 rpm but the car refuses to accelerate, it just holds it?s revs.
After quite a bit of investigation by my local independent and a replacement changeover valve I had the car ECU flashed back to normal and the problem went away.
DMS came out a couple of weeks ago to reapply the remap and the problem is back ? I?m not sure what?s going on as I?ve had the remap since 2005 with no problems.
Any ideas?
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From: Derbyshire, UK
My Ride: 535d M Sport / Carbon Black Metallic / Aluminium cube / black leather sports seats / Prof. SatNav / Bluetooth.
Have you seen this? Clean the MAF rather than change it....
Hope you find an answer soon.
How much meaner does the 535d feel with DMS than without - now you have swapped back a forth?
GL
Hope you find an answer soon.
How much meaner does the 535d feel with DMS than without - now you have swapped back a forth?
GL
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My Ride: 2006 550i, 1984 Mercedes Gelandewagen
Originally Posted by Mambo' post='1037428' date='Oct 21 2009, 09:13 AM
No ideas?
DMS came up yesterday and checked the map and said it was OK - they thought it "could be" the MAF. Don't really want to change it if it's not gonna fix the problem....
DMS came up yesterday and checked the map and said it was OK - they thought it "could be" the MAF. Don't really want to change it if it's not gonna fix the problem....
I had problems with the steptronic transmission where when the car was running at a constant speed [usually slow speeds <35mph] the transmission/ECU would try to conserve fuel by enabling the lockup torque converter. The work around, as told to me by the master mechanic at the dealership, is to use the 'sport' mode.
I would guess the issue you have is ECU/Transmission related.
Thread Starter
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Joined: Oct 2005
Posts: 98
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From: London/Manchester, UK
My Ride: 535d Sport Carbon Black, Black Dakota leather, Media Package, Bluetooth, Bi-xenon headlamps, adaptive headlamps, auto dimming interior mirror, heated folding door mirrors, electric front seats with drivers memory, heated front seats, extended light package, sun protection glass, electrically adjustable steering column, automatic air conditioning.
Originally Posted by stiker' post='1037483' date='Oct 21 2009, 06:02 PM
Have you seen this? Clean the MAF rather than change it....
Hope you find an answer soon.
How much meaner does the 535d feel with DMS than without - now you have swapped back a forth?
GL
Hope you find an answer soon.
How much meaner does the 535d feel with DMS than without - now you have swapped back a forth?
GL
The DMS map makes a hell of a difference, really transforms the car. I can feel it a lot more now that I have had it taken off and put back on - I think I must have gotten used to the power!
Thread Starter
Members
Joined: Oct 2005
Posts: 98
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From: London/Manchester, UK
My Ride: 535d Sport Carbon Black, Black Dakota leather, Media Package, Bluetooth, Bi-xenon headlamps, adaptive headlamps, auto dimming interior mirror, heated folding door mirrors, electric front seats with drivers memory, heated front seats, extended light package, sun protection glass, electrically adjustable steering column, automatic air conditioning.
Originally Posted by or_550i' post='1037493' date='Oct 21 2009, 07:32 PM
It's not the MAF. The MAF at high speed would not lock revs. If you had a rough idle or emission problems it would be MAF.
I had problems with the steptronic transmission where when the car was running at a constant speed [usually slow speeds <35mph] the transmission/ECU would try to conserve fuel by enabling the lockup torque converter. The work around, as told to me by the master mechanic at the dealership, is to use the 'sport' mode.
I would guess the issue you have is ECU/Transmission related.
I had problems with the steptronic transmission where when the car was running at a constant speed [usually slow speeds <35mph] the transmission/ECU would try to conserve fuel by enabling the lockup torque converter. The work around, as told to me by the master mechanic at the dealership, is to use the 'sport' mode.
I would guess the issue you have is ECU/Transmission related.
Thanks!
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Joined: Apr 2008
Posts: 114
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From: Derbyshire, UK
My Ride: 535d M Sport / Carbon Black Metallic / Aluminium cube / black leather sports seats / Prof. SatNav / Bluetooth.
Forget to add the search link for cleaning the MAF 
...good DIY write-up...
https://5series.net/forums/index.php?showtopic=73614
...good DIY write-up... https://5series.net/forums/index.php?showtopic=73614
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Originally Posted by Mambo' post='1028336' date='Oct 9 2009, 11:48 AM
Wonder if anyone can help, I have a 2005 535d which has been remapped by DMS and is exhibiting some very strange behaviour...
After the car has had a hard run (kick down up to about 80mph) the next time you kick down, the revs rise to 4000 rpm but the car refuses to accelerate, it just holds it?s revs.
After quite a bit of investigation by my local independent and a replacement changeover valve I had the car ECU flashed back to normal and the problem went away.
DMS came out a couple of weeks ago to reapply the remap and the problem is back ? I?m not sure what?s going on as I?ve had the remap since 2005 with no problems.
Any ideas?
After the car has had a hard run (kick down up to about 80mph) the next time you kick down, the revs rise to 4000 rpm but the car refuses to accelerate, it just holds it?s revs.
After quite a bit of investigation by my local independent and a replacement changeover valve I had the car ECU flashed back to normal and the problem went away.
DMS came out a couple of weeks ago to reapply the remap and the problem is back ? I?m not sure what?s going on as I?ve had the remap since 2005 with no problems.
Any ideas?
Thread Starter
Members
Joined: Oct 2005
Posts: 98
Likes: 0
From: London/Manchester, UK
My Ride: 535d Sport Carbon Black, Black Dakota leather, Media Package, Bluetooth, Bi-xenon headlamps, adaptive headlamps, auto dimming interior mirror, heated folding door mirrors, electric front seats with drivers memory, heated front seats, extended light package, sun protection glass, electrically adjustable steering column, automatic air conditioning.
Originally Posted by MNC2008' post='1046694' date='Nov 4 2009, 09:26 AM
I had a prblem on very high speeds, where I felt that the 2nd turbo had switched off. This problem went away after re-starting the car. The dealer replaced the turbo pressure regulator. There are 3 regulators which control the 2 turbos. After this repair - ?500. The car seem to have the problem you addressed above and the dealer then replaced all the vaccum pipes around the engine and now the car is back to normal. Hence check for worn vaccum pipes in the first instance!
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