VS: MC2 running very lean (Dag B?sterud)

[David Michael]

Dag

I had a problem where my MC-2 would randomly run lean ( I monitored the freq
valve duty cycle while driving, and it would randomly go "full rich" trying
to compensate).

Turns out that my warm up regulator was not keeping the control pressure
constant - it would occasionally bump it up from the what I had measured
when setting the idle mixture. That would screw everything up. I changed the
WUR and all was OK.

Dave