Ford Ranger Issue

Husband has 2002 Ford Ranger, 140K miles, meticulously maintained. Suddenly would not start on a Friday, fine on Saturday, not start on Sunday, started on Monday. Took to mechanic, all week everything started just dandy. They drove and hooked up to computer, nothing; cannot diagnose until actual problem occurs when they have vehicle Not ready to trade in.

Does it crank?

Echoing Rod Knox here: Does it crank (turn over)? If not then shift to neutral if it’s an automatic when it does not start and see if it starts. If it does then it’s a bad neutral safety switch. If it’s a manual shift then the clutch interlock switch may be bad.

Great and thank you. I’ll tell him when he gets home from work - if and when he does.