Idle speed motor continued...
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Idle speed motor continued...



After breaking the seal & tearing apart the Idle Speed Regulator, I
discovered what the cause of the motor failure was. The motor had not
seized in the sense that it had locked up permanently, but was stuck
in place. At the end of the spindle shaft down in the chamber, there
is a metal piece on the end that rotates around. At the bottom of
this piece is a metal rod that sticks down. On the bottom of the
chamber itself is a nitch that takes up a quarter of the space. What
had happened was the entire center assembly slid down, and the rod on
the end had slipped into the nitch. When power was applied the
spindle would turn as normal, but would then stop as soon as the rod
hit the end of the nitch. Now that I know the cause, my original
question remains, but I have a new one; Does the Idle Speed Regulator
Motor pump air into the engine, or does it limit the amount of air
that goes into the engine to create an "ideal" idle (the same sense
that the LAMBDA system works)? Right now I have the motor back in
place with the chamber about ¾ of the way open, and the engine is
idling at 1500 rpms. I'll try working with it to see about getting
the idle down to at least 900. Either way, the unit is destoyed so
I'll need another.

-Robert
vin 6585






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