Originally Posted by kmoody0507
would that sensor make my jeep run funny when its first started an sputter if i dont let it warm up
No. There's a coolant sensor (not the coolant sending unit for your gauge) in the intake manifold that adjusts the air/fuel mix when it's cold. You've also got the idle air control sensor and the throttle position sensor in the mix.
What year Jeep do you have? Have you checked codes (if it's '91 - up)?