My van continues to idle funny when cold.  It idles
around 1200-1400 RPM and usually idles normally when
it warms up.

I've checked the contacts on the idle computer, checked
the throttle switch, and the idle air bypass valve is
operating smoothly.

Does anyone know what the inputs are to the idle
computer? (what else should I check?) What am I
missing here?

Thanks,

tabe johnson/87 westy
(PS-- will changing my alternator brushes reduce the
value of the van?)