Thread: Datalogging
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      12-06-2012, 04:31 PM   #5
Second Lieutenant

Drives: Z3 M Coupe(S54) and Z4 M Coupe
Join Date: Apr 2008
Location: UK

iTrader: (0)

I was 99.9% sure that there's no MAP sensor on the Z4M. So what exactly is the datalogger reading from the Z4MC's ECU as "Airflow from MAP"? Other BMWs with S54 engines don't yield as much information from their ECUs and there's is no "Airflow from MAP" available on them.

As my graph shows, the plot from the MAP is similar to that from the MAF, but smoother (as if regulated) so it appears as if it must, in some way, be related to the airflow, but exactly what I'd like to find out?

Last edited by exdos; 12-06-2012 at 04:53 PM.