Any help if possible? #1an4 cylinders not firing, I changed the plugs, wires and ignition coil pack. No spark, injectors and compression Ok. Thanks, Steve

 

This problem is exactly the same i was experiencing with my 1997 sonata...when it gets warm it cuts out....also pointed to the crank sensor...but what i found is that the crank sensor is a signal given to the power transistor unit which in turn fires the coils...and this unit is mounted on a plate attached to the engine which when heated breaks down the components input signal from the sensor and the computer reads it as the crank sensor itself...replaced unit and walla..