Mechanics

WHY IS MY CAR REVVING TO 4000 RPMS IN NEUTRAL?

1989 Suzuki Sidekick • 175,000 miles

My car started idling very high a week ago. When it starts and is sitting in neutral, it goes to about 4000 rpms. When I put it in first, it kicks down to around 2500. Every time I shift gears, it revs back up to 4000, when the clutch is depressed, then back to 2500 when in gear. I can basically drive it down the road without using the gas pedal at all! Hard on the clutch and brakes. A friend took the vacuum line off the map sensor and the idle kicked down temporarily. Not sure what that means though. It's back up to 4000 now. It's leaking coolant a bit from the water pump so I'm wondering if that has anything to do with it. The mechanic can't figure it out and said he can't plug a diagnostic tool in.
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Benupshur
April 27, 2012.



Check IAC valve. And see if throttle butterfly is returning to closed properly.

Tiny
Fixitmr
Apr 27, 2012.
Where is it located exactly? On the throttle body? For some reason, I can't find it.

Tiny
Benupshur
Apr 27, 2012.
89 is built into throttle body.

Tiny
Fixitmr
Apr 28, 2012.