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High Idle - Not IAC - What ?? 700 1991

posted by  springlizard on  Mon Aug 2 08:34 CST 2010
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last visit: Mon Aug 5 07:02 CST 2013
[RELATED]

I recently acquired a '90 745 w/Regina with high idle. Turns out the previous owner had monkeyed with the throttle cable, throttle switch, and idle screw to jack up the idle to around 1800 (!) to mask a dead IAC, leaky air intake hose, and a hellacious vibration due to collapsed motor mounts. Check the FAQ and follow all the steps to set the throttle plate, idle screw, etc. back to specs.

A known good IAC, new intake hose, and setting the specs cured the idle problem, and new motor mounts from Tascaparts.com cured the vibration. All's smooth and quiet now.






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