hot days or just driven too much in one day.. stalls out. Have replaced oil pressure sending unit, distributor, ignition coil.. diagnostic machines can't detect the problem. After stall out, must wait 30 seconds or so before car will start again. This happens when car idles or is going 50 mph.. whenever it wants. After $1600 poured into this car this month to NOT fix the issue, mechanic and I would both appreciate an idea of where to look next. Thank you!
P.S. The stalling seems to happen more frequently in the summer.