Stall problem

My 89 Z24 with a 2.8L, stalls at different times, sometimes after driving 30 or 40 min. and some times after only running 2-3 min. Sometimes it will miss fire when I am driving.

I have replaced IAC, O2 sensor, PCV, ECM, EPROM, MAP sensor, CRANK POSITION sensor, CRANK POSITION sensor WIRE, I have checked COILS, the plate the coils mount too, INJECTORS, VACUUM AND FUEL PRESSURE. I have clean my throttle body. I have done the idle relearn.

What else is there

My trans torque solenoid is disconnected. And I have a small leak in my exhausted.


Please help

Thank you

spark plugs and wires!!