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Re: idle won't return to normal 200 1980

posted by  someone claiming to be Don Foster on  Mon Nov 13 22:38 CST 2000 [RELATED]

Zee --

"...ever tried to repair this motor electrically?"

I've taken apart, oh, maybe a half-dozen of these motors—it's a bitch bending those tabs—and found that they all had commutators completely worn through. I don't think I salvaged any of 'em.

When I decided to clean the TB on my '86 (which was thoroughly coated 'n clogged up with varnish) it resulted in a 3000 rpm idle.

I found that the PO's moron mechanic had adjusted idle using the mechanical setscrew 'cause the CIS motor had long since died. Each time more varnish coated the TB, closing off the tiny annular opening around the butterfly, the idle would drop—so moron mechanic tweaked the screw.

(He wasn't really a moron — he was a thief. Volvo owners willingly paid him for that type of work.)

When I removed the accululated varnish, the annular gap was large and idle was high. Readjusting the mechanical setscrew and the throttle switch and installing a new CIS motor solved it all.

"...farm out their technical writing. He didn't have anything..."

Thanks for the thought!



Don Foster (near Cape Cod, MA)





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