listen to this problem and please help! when i start my car the temp guage usually takes a while but eventually gets up to normal operating temp. all this time the idle speed is adjusting from 1500 to 750 rpms until it too is at normal operating speeds. then if i get on the freeway or keep the rpms up the temp guage falls and the idle then goes up and idles as if the car is still warming up gradually decreasing back to normal idle as the temp guage goes up. Does that seem normal to anyone...Please help!!??


lets go

 

doesnt sound normal to me, might coolant temp sensor. Good luck