Im looking for a little help here. Ive been fixing up an old 1993 pathfinder could use some advice. Ive got a hesitation when I take off sometimes causing a little sputtering. I can accelerate through it and the truck runs and Idles fine. Ive replaced the plugs, wires, distributor and rotar. My next move may be the tps. Whats got me puzzled is when the weather is cold hesitaion is missing or slight and gets more noticeable when its warm. My temperature guage has always been completely to the left on cold. It works becuse it goes up when I climp a hill and drops back to the peg on the way down. I have heat but not as warm as It probably should be. I can drive for an hour and put my hand on the engine and its warm but not hot. I assume my thermostat is stuck wide open. Can an open thermostat cause my hesitation by not letting the engine heat up completely? Id check it but its such a PITA to get at. Any thoughts would be greatly appreciated.