Idle problem
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Idle problem
Okay guys i know this is a little off subject, but i have a idle problem that happens on and off. with my 89 f250 351, it revs at 1900 rpm and when i unplug the vacuum hose to the map sensor it idles about 700 rpm. ive already replaced the map sensor and it does the same thing. i cant find any vacuum leaks anywhere and when i unplug the connector to the IAC nothing happens it continues to rev high. any more help would be much appreciated.
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