Stalling

This can be one of the most difficult problems to diagnose because there is no chance to make any checks to see what is wrong - the car starts right back up! If there a no fault codes stored in the computer system as seems to be your case that only make things worse. You can help your technicians by trying to remember the conditions when the engine will stall - hot engine or cold engine, a/c on or off, accelerating or slowing down, cold start (first thing in the morning) or after hot soak (making another trip about 10-15 minutes after turning the engine off.), ect.. Any information about the conditions when your 1997 Mercury Tracer stalls will be helpful. Crankshaft and camshaft position sensors, ignition modules, idle air control valves, and ignition modules are some components take can cause intermittent stalling conditions.