Can you elaborate? Are you experiencing complete loss of pressure, or when you triggering? Which portable?
Is it pulsating? What does it do? Did you check the electrical connection, is the wiring loose? There are many reasons for the loss of pressure. Even some debris, or lint in the water pump valves can cause, broken seal(s). Is it 205, 207 V, XP1-Cat pump? Is the motor with a rectifier or big-ass Baldor? The pump can be rebuilt easily if you are patient ( rebuilt kit A, B, C ) will cost more than a few years ago probably around $150-$200, but the pump is going to be expensive. Open the shell of the portable, if you have a 205 V pump it should be blue, 207V can be black or blue, I don't remember exactly.
This is a 205 V in the attachment.
Like Clean Response said, you have to talk to us, there is no other way around
View attachment 123529 View attachment 123530