My Jeep has become cold blooded; rough choppy idle, stalls. low power...until it warms up and runs fine, classic symptoms of an open choke on a carbed engine. Since I have throttle body injection, I know its because the ECM thinks the engine is warm, and has the mixture wrong. I've seen on this forum that the proper sensor can be hard to find. NAPA shows a coolant temp sensor, ( @ $79! ) , so I certainly do not want to get the wrong one at that price. I can unplug the each of the two to determine which goes to the ECM, and which goes to the temp gauge, but is the ECM one hard to find at the parts store?