Stalls at idle

NOPLAINJANE

MEMBER
1997 GEO METRO
4 CYL
FWD
AUTOMATIC
200,000 MILES

Hi

We have a 97 Geo Metro with a 4 cylinder. Recently we began having problems with it staying running until eventually it would not even start at all. A friend suggested we replace the throttle positioning sensor, which made sense, so we did.

Now it starts, no problem, unfortunately, the throttle is stuck WIDE open and will not throttle down. We tried resetting the computer but that did not help. We cannot leave it running long enough to mess with it for fear it will blow up and dont really have a clue as to where to start.

Does anyone have any suggestions? With fuel prices approaching $4 a gallon in Washington state, it would be so nice to have the Geo running again.
Thank you in advance.
Janie

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Try below

Too fast an idle speed. If an engine without computerized idle speed control is idling too fast and refuses to come down I would service the throttle bore and IAC

Here are guides to help

https://www.2carpros.com/articles/throttle-actuator-service

and

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

Here is a guide that can help as well.

https://www.2carpros.com/articles/stall-at-idle

Please run down these guides and report back

Cheers

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Friday, May 2nd, 2008 AT 5:29 PM

TNJ8361

MEMBER
1 POST

Have a question regarding something similar. Dealership told me the CE light was on due to throttle body I think. Said that throttle may be getting stuck at times I think. Whichever was I do know that it would lower gas mileage. No problems with my rpms or anything like that usually stays between 1 and 2 till get on it quick. So I did what you said and serviced the throttle bore and IAC and the car has never run better thanks so much.

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Thursday, May 26th, 2016 AT 3:04 AM

JIMHARTY63

MEMBER
1 POST
1992 GEO METRO

Engine Mechanical problem
1992 Geo Metro Front Wheel Drive 50000 miles

Example: If I run idle up to 2500rpm once it reaches it she wants to die then revs back up to 2500rpm and wants to die again. It will go up and down up and down no matter want rpm you try to hold steady PLEASE HELP I AM LOST.

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Sunday, August 5th, 2018 AT 8:51 PM (Merged)

RASMATAZ

MECHANIC
75,992 POSTS

Check the fuel pressure to rule out the fuel filter, fuel pressure regulator and fuel pump and test the throttle positon sensor and manifold absolute pressure sensor.

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Sunday, August 5th, 2018 AT 8:51 PM (Merged)