Pump not adding pressure to water flow

Even with a new pump its important to check fuel pressure and flow . Low pressure fuel pressure regulator stuck open or fuel pump faulty . Low flow blocked fuel filter . if the above is all ok. Back probe injector with led trouble light , light will glow while motor is turning over. if not check fuses , if ok check injector cable back to the ECU for bad connections .

Small stream sounds like your pump is not working at all - you are getting house pressure only. First check the intake fitting where you attach the hose for debris that may be clogging the water flow. Same for the pressure hose and quick connect fittings. Remove the tip from the wand and see how much flow you get. If it's still only a small amount, with the motor running, you probably have a bad pump. This can be caused by bad seals inside the pump, or by running the motor without maintaining water supply to the pump, which can melt the seals or even seize the pump if allowed for too long. Repairing the pump is typically more work and expense than replacing it, assuming you can locate a replacement pump.

sounds like your pump or motor seized from overheating which makes parts swell / grow in size/expand so they stop working ,,,letting cold water flow through the pump would have cooled the parts and help shrink the parts again .. Overheating can do permanent damage to your machine.. I think it needs to be dismantled and inspected for damage by someone who knows what to look for. not sure if the problem is in the pump or the motor, hope that helped.....pete

Water comes out the nozzle, but low pressure? ( more than when the motor is not running)
I would check the check valves and the unloader.
If the amount of water coming out the nozzle is the same when the motor is running or not running.
Either the key that connects the motor shaft to the pump shaft is sheared, or the pump is trash.
No water comes out the nozzle would indicate a clogged inlet filter or blockage at the gun valve or nozzle.

Certain in-line water pumps utilize different impellers depending if the pump is designed for a pressurized or a free flow application. If a pump is to be used on a free flow set-up, a smaller motor with a free flow impeller can be used to push as much water as the larger motor with an impeller that handles pressurized systems.

The first thing you need to check is if you have the water supply hocked to the mechine with no pressure line connected just the water dose it spray out the pressure line connecter with out the engine running . If this dosen't happen the water pump is no good . You can never start any kind of mechine like this with out constant water flow . It sounds like something is broken between the engine shaft and the pump the pump is likely seized and this broke the connection between the engine and the pump. If this is the case the mechine is likely not worth the money you would have to put into it to save it

pour liquid TSP into the fresh water port (where the garden hose connects) and let it sit there for a couple of days.
This will clean all the calcium and lime deposits within the pump.
This is how I fixed my pressure problem.Hope it works for you.

Try filling water from the front manually. Check whether every thing works normal.

If works OK, check your water inlet for free flow.Try the inlet hose externally by flushing water through the hose.

Check whether any air lock. If air lock noticed, air will flow in broken streams.Flowt will become OK after some time.

Try now in the machine by connecting.

Before you start it up:
1. Disconnect the high pressure hose 2. Connect the water supply and turn on 3. Make sure water is flowing through the pump
Start the motor, run for about 10 seconds and then turn off.
Turn off the water supply, connect the high pressure hose, turn water back on, start the motor and away you go.

Water is supposed to flow slightly through the pump without it running so disassemble the wand and cut on water supply, see if water comes out of the wand on-off handle. The motor does not have to be running. Got water flowing? YES - clean out the wand filter or nozzle hole. A partially clogged filter will prevent hi pressure activation.
NO? disassemble pump and clean out chamber paths.

Also - A pressure pump is not suppose to be running and not used for over ten minutes. The pump can overheat from lack of water passing through and damage the pump seals. A clogged wand is the same as not using it while you try to figger out why it doesn't have high pressure. I found my clogged filter and stopped up nozzle but haven't gotten my real high pressure back yet. Sears doesn't sell the valve seal kit but someone does.