Hello all I recently bought a 2016 dodge grand caravan and my problem us the vehicle will surge between 80 and 90 kms/hr. It seems to do it more once the vehicle is warm. The tach will jump up and down. If you hit the gas or let off the problem goes away and may or may not come back right away. I am thinking TPS but no engine light has come on. Anyone else experienced this problem and found a fix?