Fast idle when warm. Carbed '89

[David88]

Anyone ever have the idle go way to fast when the engine (carbed) is warmed up? mine starts fine and idles normal for warming up. When its warmed up for a few minutes its idling about 2500 to 3000 RPM. Wont slow down at all. Tried to force the throttle linkage closed at the carb and the computer forces it open against your push. Thoughts? Car sat for 2 years not running.
Thanks

[mechanicaldj]

coolant temperature sensor gone bad

[Festiva GTX]

High chance could be coolant temp sensor, I have same that problem but replaced new one works better.

[David88]

Thanks, I checked the Haynes manual troubleshooter section and it didn't offer anything for high idle. I try that.

[kenwood99]

I was wondering, does the cooling fan cycle on and off? If the fan works OK it seems like the cooling sensor works properly. Wonder if it might be the O2 sensor?? Just Wondering!!

[David88]

The coolant fan cycles normally.

[geezerstiva]

mine does that too. i think it's just a trait of the carbed festy. gives it personality :lol: