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Spyder Idle stuck

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Buckingham1993

Probationary Member
2
0
Apr 16, 2021
Maysville, Kentucky
Had a misfire in 99 gs spyder with a 4g63. I thought that was causing my idle to be high but I replaced the plugs and wires and the misfire is gone but it’s still idling between 2 and 3 grand.
 
It's not electrically possible to idle that high. If you had a vac leak or aomethung Ecu cuts fuel after 1500 if throttle is closed. So either ecu doesn't know throttle is closed or you might have a physical problem associated with throttle. The cable slipping out of its crimp and getting stuck is a known problem as the cars get older. Plates can get stuck also. Both of those situations keep throttle from closing allowing an "idle" higher than 1500. See if that helps.
 
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