knklhead

I drive my car quite a bit for business and it runs very well. 30 MPG, smooth as silk, EXCEPT when I am pulling up a long hill. The car seems to stutter. While not sure if it's just this RMP range, 2500 to 3000 RPM is when I notice it.

Cruising just fine, 75 MPH, then a long up hill. Often I am using cruise control and under the load it starts to surge as if it's having a hard time.

I'm prepared to do the work myself. Could it be Vanos, fuel pump, fuel filter or vacuum leak? Appreciate the information!

2004 525i M54 80,000 miles

twh

Has it been consistent for a while -- if it's just recent maybe bad gas. Could also be spark plugs or ignition coils. Get a code reader for BMWs and see what the car is telling you. I suspect it has something stored.

knklhead

thanks, TWH. It's been happening for a while .. but yes, seemingly mostly on, but sometimes off (when it's cooler?) I have BMWhat and a code reader and will take a look. Here are the latest faults that I can see .. I think I'll rerun them. I may have deleted a fault. I also want to put ethanol-free in to see if that helps, if I can find a long-uphill pull.

Fault Report - BMWhat - Version: 13.03
ID1: d9bf0688-681c-4a07-a6d5-04e0cb697145-867
ID2: 871e05c7-9276-4373-b415-2570204dc523-adc
INFO: 0603CCBBAB9B8E86685545352A185
Base: E60 E61
Faults: 5
ECUs: 30
Model: 525 i M 54 25 6S 5
Battery: 11.0V
Date: 2014-07-25 19:44:37
CBT.
ABS / DSC / Brake:
Active Roll Stabilization / Rollstabilisierung
ECU not present/no response from ECU
Dynamische Stabilitaets Kontrolle / DSC
Fehler: Invalid signal / Message / KL 15 failure
Code: 5F56
Heating / AC:
Air conditioning / Klimaanlage
Fehler: Short circuit to positive or open circuit - additional water pump / Refrigerant compressors
Code: 9C77
Fehler: Error fogging sensor - K-LIN 3 RLS / Fresh air motor / PTC auxiliary heaters
Code: 9C55
Systems:
MASK
ECU OK, no Fault Code
Center-Konsole
Fehler: MFS fault
Code: 9FEB
Body:
Automatisches Front Steering
ECU not present/no response from ECU
Trailer / Anhaenger
ECU not present/no response from ECU
Car Body Module
Fehler: AL pin error
Code: A43E

knklhead

Sorry to update so late ... for those that may have a similar problem, I did a COMPUTER upgrade and the car runs perfectly! (I did this a few months ago, all is good!)

nairb

computer software?

knklhead

Sorry, yes. Please see this post:

https://5series.net/forums/e60-discu...solved-139716/

It is a DME software update, and the Service Information Bulletin (?) is: SIB 12 08 05