So tell me, is it only the ZHPs that have this dip thing around 4 K rmp?
So tell me, is it only the ZHPs that have this dip thing around 4 K rmp?
Download the SIB linked in my post above.
A few M54-equipped models are affected, E46 and others. Early E60 530i, early Gen 1 Z4 3.0.
3.0L M54 only, not the 2.5L. And man-trans only.
According to Jim, it's only cars with MS45 software... But apparently SIB says otherwise.Quote:
Originally Posted by Oli77
Sent from SIGFest 2012, via TTv1.5.4
On mine it did it in 3rd too but it was more noticeable under acceleration in 4th, 5th and 6th. And like you said, more noticeable going up a hill, or even into a good headwind. I assume it might have done it in the lower gears too but the engine ran through that 2800 to 3000 rpm range so quick that you just didn't notice it.Quote:
Originally Posted by ranger
I have M54B25.
Assuming I am spared from the dip blues according to that SIB.
You should be un-affected Oli.
What it says to me...in a nut shell is......"blah, blah, blah....you're going to be without your car for a month, blah, blah, blah....."
I've copied the SIB here....
This Service Information bulletin supersedes S.M. B12 209 05 dated 4/6/2005.
SUBJECT
M54B30 MS45.1; Engine Power Drops at 4000 RPM
MODEL
E46, E60, E85 with M54B30 engine and manual transmission only
SITUATION
The customer may complain of an engine power drop at approximately 4000 RPM during aggressive
acceleration.
CAUSE
Ignition timing retardation shift due to unfavorable knock adaptations in the 4000 – 5000 RPM range.
CORRECTION
On a customer complaint basis, perform the procedure described below.
PROCEDURE
1. Verify the complaint. This situation can vary from a slight surge to a noticeable drop in power
during hard acceleration.
2. Do not replace any parts!
3. Submit a PuMA case requesting authorization for DME shipment to Engineering Department for
reprogramming. For the PuMA case title please use the following: "MS45.1 DME KNOCK
ADAPTATION RESET".
4. Reinstall the DME.
5. For E60 only: Reprogram the vehicle using CIP 19.1 (Target Data Status E060-05-09-530), or
higher.
WARRANTY
Covered under the terms of the BMW New Vehicle Limited Warranty.
For the appropriate labor operations please refer to the KSD system.
SI B 12 17 05
Engine Electrical Systems
September 2005
Technical Service
[ Copyright © 2005 BMW of North America, LLC ]
Page 1 of 1
http://www.bmwtechinfo.com/tiscode/c...tins/htm_store... 10/9/2005
I suspect the only reason it says to send the DME to Jersey is because the SIB is so old (fix might not have been rolled out by that point). Unless there's a hardware change, I don't see why flashing the software in-house would be an issue. Latest software is circa 2008. On my old ZHP it did nearly eliminate the 4k dip issue (well it was detectable on a dyno, but every 330 has that)
I would like to see what a Jersey-flashed DME reports itself as. If it's the same hardware/software that dealers can flash in-house today, then there's probably no real benefit from having it sent to Jersey and paying $500+
damn good info
Quote:
Originally Posted by terraphantm
I'm not sure why it needs a PUMA case and sent to BMW NA for programming but I did have it done and I'm uncertain of many things it did. it supposedly removed the dip from 3k but I also noticed my DISA Valve is now always open when the car is running.
Whad do you mean how it reports itself? I have the DME updated so what information would you like me to pull? I can try and pull it off at work.
Meaning yours was sent to NJ or just re-flashed at the dealership?Quote:
Originally Posted by derbo