I have an 85 with a 1.9. I posted earlier with issues during idling
where it would run up the idle to 1300-1400 and then drop to 500-550.
Well with alot of testing and simple clean and fix I have a smooth
idle at 1050-1000. But now when I turn on the A/C this wont idle at
all. will do about a ten second shutter and shake the just die. It
runs and idles fine without the air. The biggest problem at the idle
was core was loose dirty corroded ground cables Must have been 6
different cables all on this one bolt,. Unbolted them all cleaned and
sanded them  including the motor ground, Sanded the paint from the
grounding point assembled all the now clean wires and connectors
covered them with di-electric grease and bolted it all back on. While
I was sweaty and dirty I decided to make a separate new ground to
chassis from the engine.. I used #6#stranded copper with cable
connectors and bolted this onto the motor,securely and the other end
to the firewall where I ground down the contact point to clean solid
metal, I am now positive the motor has a good solid proper ground. I
coated everything with di-electric grease so that should hold it for
several years.
What can be causing the A/C to kill the motor. I am looking for a step
up on the linkage and there is none, Somewhere there has to be a step
up or a kickdown to raise the idle so the a/c will work. Any ideas or
suggestions?
Thanks for all the help guys. It saves what little is left of my hair.