Hi
I have spent the last 18 months learning how to diagnosis engine problems over the internet from engine scanner logs. I'm in the process of writing it all up, so it can be shared for free in the various BMW forums I roam on the internet. Including this one.
The process is well sorted for M52TU and M54 engines with narrow band pre-cat O2 sensors.
I have plenty of problem logs from M54's with the wide band Pre-cat O2 sensors, but no logs from cars in good condition to compare them with. Cars in good condition are engines with fuel trims in the +/-4% range.
If you have a Z4 with the M54 engine and are feeling generous, could you please let me know, either through this thread or via a private message.
I'm focused on the Z4 rather than the Z3 as the Z4 has the MS45 DME and the wide band pre-cat O2 sensors. The Z3 has the narrow band pre-cat O2 sensors and the MS43 DME. I have several Z3's and have almost tested them to death.
What's involved?
www.e46fanatics.com
What do you get in return
It's one of those cases where I need your help today, so I can help you in the future.
Regards
Murray
I have spent the last 18 months learning how to diagnosis engine problems over the internet from engine scanner logs. I'm in the process of writing it all up, so it can be shared for free in the various BMW forums I roam on the internet. Including this one.
The process is well sorted for M52TU and M54 engines with narrow band pre-cat O2 sensors.
I have plenty of problem logs from M54's with the wide band Pre-cat O2 sensors, but no logs from cars in good condition to compare them with. Cars in good condition are engines with fuel trims in the +/-4% range.
If you have a Z4 with the M54 engine and are feeling generous, could you please let me know, either through this thread or via a private message.
I'm focused on the Z4 rather than the Z3 as the Z4 has the MS45 DME and the wide band pre-cat O2 sensors. The Z3 has the narrow band pre-cat O2 sensors and the MS43 DME. I have several Z3's and have almost tested them to death.
What's involved?
- Using a typical EML327 OBD2 dongle/adapter to talk to your engine DME. You may already have one.
- Installing the OBD Fusion app onto your smart device. There is a small charge.
- Reading the OBD Fusion thread below and setting up your app.
- Running 3 standard logs. Cold start, High Cruise and Hot Idle.
- Sending me the logs, either via Email or loading the logs into DropBox or similar and posting a link to the files on this thread.
OBD Fusion
If you have a smart phone or tablet, get an OBDII app and wireless adapter to see exactly what is going on with the engine fuel management system. A quality OBDII tool supports the following: Diagnostic Trouble Codes (DTCs) in Pxxxx format (such as P0171) Individual emissions readiness...
What do you get in return
- An acknowledgement in my document as a person who helped
- A copy of the spreadsheet that I use to diagnose the logs
- Any insights into your car's condition that I can see.
It's one of those cases where I need your help today, so I can help you in the future.
Regards
Murray