2000 international 9400i keeps stalling when driving down the highway and hit a bump

sounds like a problem I had before. solved by replacing sensor on throttle pedal but you may want to ask in "The Garage" section. guys hang out there a lot smarter mechanical than me.

 

Sounds like a possible split second loss of ignition power. This would explain having to cycle to the pedal. Are you getting any warning lights coming on? Another possibility is a short in the harness for the throttle sensor, this should also be triggering a warning light.

 

acronym for the above is TPS.sounds like a good call dtt.

 

if you have battery box under driver side bunk,batteries famous for "bustin' loose"and bouncing around causing loose or broken battery connections.good luck.

 

I had the same issue on my old freightliner one time. Turned out to be a bad starter. Every time I hit a bump it would ground out inside the starter housing.