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DISCUSSION => Engine management => Topic started by: Asterian on March 25, 2013, 02:43:17 AM

Title: "Rough Idle Fix Via AFM"
Post by: Asterian on March 25, 2013, 02:43:17 AM

Hi guys! What do you think about following adjustment:
http://www.youtube.com/watch?v=MTnB5X4lURk (http://www.youtube.com/watch?v=MTnB5X4lURk)

Were somebody tried?
Is it literate?

Title: Re: "Rough Idle Fix Via AFM"
Post by: DesktopDave on March 25, 2013, 04:20:41 PM

I did that on an M20 once, it helped a bit.  It's a bit risky though - I'd only try one notch at a time.  The AFM is pretty important to the DME fuel curve - it's easy to fix the idle but mess up the rest of the AFM output curve to the DME though.


Be sure you mark the original position of the wheel so it can return to original position if necessary.  Also be sure to seal the cover back on with a bit of sensor-safe RTV.  You don't want to corrode anything in there.

Title: Re: "Rough Idle Fix Via AFM"
Post by: keflaman on March 25, 2013, 06:07:34 PM

I got motion sickness trying to watch that video. :P

Title: Re: "Rough Idle Fix Via AFM"
Post by: Asterian on March 26, 2013, 03:22:10 AM

... Maybe its more correct for same reason to use Idle CO adjustment screw on AFM?

Title: Re: "Rough Idle Fix Via AFM"
Post by: DesktopDave on March 26, 2013, 06:18:01 PM

We don't have those here - BMW left the CO pot adjuster only in Euro models AFAIK...our catalyzed cars have no need for that adjustment.