M42 Air Flow Meter AFM - how to know if it is optimum

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selespeed
E30 Zone Newbie
E30 Zone Newbie
Posts: 28
Joined: Sat Jul 31, 2010 11:00 pm

Tue Aug 12, 2014 4:44 am

recently a user meddled with the metering of my AFM. as a result of this, my fuel economy suffers quite badly. is there any way the diagnostics can tell if it is operating rich or lean or optimum. I don't like this experimentation. so, how can I set it back to the original setting?

the AFM is one for e36m42 engine, but installed on e30 4 door.

thank you.

selespeed
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jon-m42
E30 Zone Regular
E30 Zone Regular
Posts: 570
Joined: Sat May 23, 2009 11:00 pm

Sat Mar 07, 2015 8:10 pm

Take it to a garage and get the to test the CO emissions and then they will and should be able to set it right if it is out.
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