HIGH IDLE

[XfireZ51]

Originally Posted by GOFAST

Here's the update. At start-up my engine idles at 700 RPM but once it is fully warmed up, it idles at 850 RPM. Now the interesting part ... if the engine is shut-off once it it fully warmed up, the idle drops to 700 RPM and stays there unless I drive it again. Once driven for awhile the idle goes back to 850 RPM.

I'm assuming the throttle plates are sticking and for some reason "released" when the engine is shutdown. I would appreciate your input.

Thanks.

It's throttle plates. Going thru exactly same issue w mine. TB was taken apart for paint. Throttle plates need to be fitted.

[GOFAST]

What causes the throttle plates to "release" when the engine is shutdown?

[gbmidyear66]

I agree with Dom- see my post #13

[XfireZ51]

Originally Posted by GOFAST

What causes the throttle plates to "release" when the engine is shutdown?

Lack of vacuum.

Just got mine back together and started. Idling much better. Still need to set Min Air, adjust IAC counts, and final TPSv. Whenever I put scan tool on it,
I see the Desired Engine Speed at 3188rpm. Not sure why that is showing up unless it has something to do w resetting the IAC when it's unplugged.
I also think I need to reset throttle cable. Cruise control seems disconnected to throttle.