92 low idle when cold, high when warm

[—Martin—]

Hello all. I drove my 92 a couple days ago when it was about 20 degrees outside. It started fine but it did not want to keep running. I had to press down the gas pedal slightly to keep it running. After the engine warmed up it would idle like normal. When I finally got to work I put it in park (yeah, it's a slushbox) and the idle jumped up to around 1100 or 1200 rpm and stayed there. Why would it have a low idle when cold but a high idle when warm? It's like the temp sensor is backwards.

[— Agent☣Orange —]

Stuck IAC?

[— kung fu jesus —]

The IACV is likely gummed up. The cold weather is making it sticky.

[— kung fu jesus —]

From experience, cleaning the IACV requires a little care in cleaning solutions. I prefer aerosol electronics cleaner or throttle body cleaner. Carburetor cleaner will ruin it. There’s a funky “B” shaped gland gasket that usually needs to be replaced when you remove the IACV from the TB.

I usually clean the TB separately at the same time, I clamp off the little coolant hoses, or replace them if they need it.