I gotta 93 Civic Si. It's been idling irractically since winter started. I took off the IACV off the intake mani and cleaned it out, but now it's idling even when the car is warmed up. I could be driving around for 2 hours and STILL it would be idling! Then we took off the TB and put on a new TB Gasket...thinkin' i had a TB gasket leak which it turned out NOT to be. We checked all vaccums too...funny thing it's doing too is that it'll warm up to mid range, but sometimes the needle will fall to Cold, then blow cold. WTF is up with that?

Im thinkin' thermostat....maybe the stats not opening all the way thus lacking coolant into the motor causin' it to idle...anyone else have this problem?!

Thanks in advance.

Edit BTW it's not trippin' any codes either..