Quad-4 (1228707 ECM) Rough Idle Problem

[ECMnut at aol.com]

Hi Will,
would you happen to have a chip file?
 If this is a map system and you are still using the
chip from the older app (maybe lower vac?) that might
have something to do with it.
Timing & fuel could change significantly as MAP
signal fluctuates even a little.  What are the BLM
numbers showing? 
Mike V
> 
>    * Idle RPM has variations of +/- 75 RPM or so.
>    * Advance at idle is 11.5 - 21.5 degrees, varying in an
>      apparently erratic manner.
>  
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