Here is another "debug" trick.
Take a Kitchen ingredient Cup, measuring cup, clear if possible.
1) Run your pump till it stops.
2) Turn off Fresh water pump breaker.
3) Use Kitchen Cup, open up a faucet and measure the volume of the Cold Water. Record captured volume and time to finish the fill.
4) Do each faucet for steps 1-3
All should be the same approximate volumes and time.
The lowest volume is your problem faucet.
Jim...
PS: Water is essentially incompressible and you can't detect significant water on long runs of pipe.