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Old 09-05-2008, 07:50 AM   #1
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Join Date: Sep 2007
Location: Montreal
Posts: 186
My Ride: BMW 330ci
Question Need help to read BMW ECU data

I need some help regarding OBD readings from my ECU.
These are not trouble codes but OBD data on the engin performance for tuners.

I would like to know what are these measures, what is their unit and what is the reference for the values.
The readings are coming from the ECU of a BMW 330ci 2002.

If there is a web site with specific description on BMW ECU data ?
Please don't post staff on trouble codes ...

RPM Easy, this is the rpm
LOAD_PCT Engin load
SPARK_ADV Spark advance
VSS Speed
AIT Air intake temperature
LONGFT4 Why I read 4 fuel trims .. no idea ?
MIL Malfunction indicator lamp
DTC_CNT Detonation count ?
RPM2 This is on canal 103
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