1993 Toyota Supra high idle

1993 TOYOTA SUPRA
205,000 MILES • 6 CYL • 2WD • MANUAL
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93SUPRA
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i have a 93 supra. the car was running perfect 3 days ago. i went to crank it up about an hour after drving it home and the idle was realy rough. decided not to drive the car. the next day i cranked it up and now it idles steady at 1800 rpms. drove the car around the block and it is running very rich with a little black smoke. i need some help please!!!! there is no CEL
Oct 9, 2008 at 12:05 PM
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MMPRINCE4000
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Remove and clean the IAC.

Generally a high idle is a vacuum leak. Check all the vacuum lines for cracks.
They get brittle with age and constant heat cycles, abd can crack very easily.
Nov 16, 2008 at 8:08 AM