I got no suggestions last time, so I am trying again.

Our 1995 940T with 90K miles had started acting weird in the cold. It always would idle a little higher when it was cold, but lately on some mornings it will really race to the point where it can maintain 40 mph without stepping on the gas on a flat road. Other mornings, when the temperature is the same, it doesn't do this. Even when the temperature sensor indicates that it is fully warmed up (about 5 minutes) this continues for maybe another 5 minutes. Eventually it will return to normal, but in the meantime it feels like it has a mind of its own and wants to race. When you shift out of park and into gear it really jumps.

The throttle body was cleaned a few months ago and the idle was perfect until about 2 weeks ago, so I don't think that is it.

Any thoughts?

I responded a couple weeks ago to similar post -

940 turbo high idle 𖛼]
posted by BIGOJAYDOG600 on Fri Dec 19 05:22 UTC 2003
(1 response)

good luck! Hope it helps.

I had a similar problem several weeks after cleaning the T-body. Yes, 40 MPH in idle. I found that it was the throttle linkage, not allowing the engine to go into the “idle mode”. I had loosened the linkage adjusting screws without realizing it, when removing the T-body. The throttle butterfly valve was not closing enough to click the throttle position switch.
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Tom F Three 940s. Lein holder on two more (the kid's). Rust in peace, '78 245, probably Campbell's soup cans by now.