Originally Posted by D.
I have a Stant 160degree T-stat in mine. No problems at all.
Is your tune is adjusted for it? There is a setting in my 06's tune for recognizing fully warmed at 160F. This can effect your idle rpms too.
It might "work". But if not changed your right on the verge of running in a warm up mode. (richer and/or higher rpms)