While working on the Speed Distance sensor issue on my Turbo Z another gremlin surfaced. After letting the car idle for 20 minutes or so it died out of the blue.... wouldnt restart..... changed HEP... started ran fine for 10 minutes.... died again..... You can hear the ASD click and fuel pump turn on but wont start... this happens several times. If you let the car sit for a couple minutes with the key on You can hear it come back to life (fan turns on, starts normal), runs for 10 minutes then dies. The only thing I havent replaced in the last year is the Power module, there is pressure at the rail, No codes.... 1985 Turbo Z, w 1990 2.5 TII, 1987 GLHS electronics w FWD perf. custom cal. Anybody have any ideas????