1998 Ford Ranger 4.0L 4x4 with engine code P0320

Question

1998 Ford Ranger 4.0L 4x4
Code p0320
It will run fine for a week and then no start or stall and no start.
Are there any tsb's for this?
Replaced the crankshaft sensor but am not convinced it is bad.
Every time I have looked at it the vehicle starts and runs fine. I am leaning towards an ECM or wiring problem.

Answer 1

P0320 Engine speed input signal

You could do a wiggle test at the CKP , with the engine off and start if it acts up the harness connection would need further inspection

Answer 2

P0320 FORD - Ignition/Distributor Engine Speed Input Circuit Malfunction
Read more: https://www.autocodes.com/p0320_ford.html