1999 Stalled and won't restart

[mtb50]

Originally Posted by 78F350

I just had a call from a friend on the side of the road. His '99 just died out as if it had been turned off. No bad noises, no puddles, just stopped. I suggested fuel pump relay and Crank sensor, but he is on the side of the road with no tools or parts.
It cranks, but does not fire.
Tach jumps slightly.
Fuel pump relay was pulled out and put back in.

#1 He's staying safe and calling AAA.
#2 Hoping there's another thing to look at or try to get it running.

Any suggestions?

Has he recently drove in a lot of rain or maybe washed the car with the drains plugged? Maybe immobilizer