Super high idle

Hi All,

I have a '97 Geo metro lsi, 1.3, 5 speed, 164k miles. It idles at 7,000 RPM. It has the cel light on but I can't even get it to a place where I can have it read. I tried replacing the TPS, but that didnt do anything. It says in the manual something about the idle speed control motor, but I cant locate one of those either. Any ideas?

Well that is still 2,000 rpms lower than a formula1 car idles.

J/K. You may have a huge vacuum leak somewhere (brake booster hose, brake booseter, PCV valve) or the throttle is binding open somehow.

-MechanicMatt

No vacuum leaks, and no binding.

Why can't I seem to find a idle speed control motor anywhere?

The idle speed control motor looks like a black box on the back of the throttle body. I came across a brief section in the factory service manual. I hope that this will help you in your quest.

http://i77.photobucket.com/albums/j64/isc20/62644423.gif

-MechanicMatt

Thought I'd give you a visual on what the idle speed control motor looks like.
http://i303.photobucket.com/albums/nn152/burnidaho/th_P5030426.jpg (http://i303.photobucket.com/albums/nn152/burnidaho/P5030426.jpg)

7,000 rpm is wide open, the rev limiter is the only thing stopping it. I don't think the idle speed controller has that kind of capacity. You've got a huge vacuum leak or the throttle butterfly fell off.

Yeah, Woodie, I'm with ya man.

On the other hand I took a picture anyway:

http://i77.photobucket.com/albums/j64/isc20/iscmotor.jpg

-MechanicMatt