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Pump works, but there is no pressure - Plumbing

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You may have cracked internal pump parts. these are cheap to replace

Posted on Apr 15, 2015

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If pump is primed properly, either the impeller has come off or is blocked. You may have to be a bit more descriptive if this isnt the case. ie: Pump model/make, suction description, size type length height etc. discharge description

Posted on Apr 13, 2015

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1 Answer

Will ecu keep fuel pump from working


if the system includes the ecm to give power to a pump relay when required then the ecm will stop the pump working at times when the fuel pressure reaches the regulated pressure
I would be looking else where ,like having a pressure test done on the fuel system to find if relay, pump or regulator/ pressure sensor fault

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Isomac Rituale over pressure


Check if the pressure relief valve is working fine, if not you need to replace the valve.
If valve is fine check if there is an obstruction in the lines, this can incrtease the pressure.
If everything else is ok, replace the pump.

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Working pressure


Putting 60 lbs. of pressure in the pressure tank is not the answer.

First determine that the pump is working correctly, Open the drain valve and see if you get a good flow of water. If you do then OK, the pump is working. If you are not getting a good water flow from the drain valve, then the pump is not operating correctly - maybe a bad foot valve. Next open the drain valve and watch the water pressure gauge, and note at what pressure the pump kicks on ( that's the cut-in pressure), and when it kicks off ( that's the cut-out pressure). Most pumps are set to operate at 20-40 psi, or 30-50 psi. The cut-in and cut-out pressure is set by the water pressure switch.The pressure in the water tank has to be set 2 psi BELOW the cut-in pressure of the pump. That is, if the pump has a 20-40 psi differential, then the tank has to be pre-charged to 18 psi.

To pre- charge the pressure tank , the pump has to be shut off. The Tank needs to be emptied (drained ) of water. The air pressure is then set to 2 psi BELOW the cut-in pressure. If water escapes from the air valve, the bladder in the tank is ruptured, and a new tank needs to be installed.

So, first make sure the pump is working.
I WOULD RELIEVE MOST OF THE PRESSURE IN THE PRESSURE TANK TO ABOUT 20 PSI BEFORE CHECKING THE PUMP, AND PRCEEDING WITH THE PRE-CHARGE OF THE TANK.

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1 Answer

Have a gauge hooked up to low pressure fuel pump and it shows it works but high presssure one doesnt


Check to see you have oil up to full on dipstick . The high pressure pump picks up oil at the top level so if oil starts to get to low engine will stop before engine damage . The high pressure pump is what makes the injectors fire . Also check the wires that go thru valve cover some times they burn up and you can smell the burn thru the oil filler cap .

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I have a Husky 3000 PSI - Was working fine (I think ( for about hours. All of a sudden it seemed to get a burst of energy and worked faster. Shut it off to add gas. When I started it up again, there...


Pressure washer are pretty simple, a few pistons and a spring device to control the pressure. The problem could be a broken part inside the pump itself. With any luck it could be the linkage between the pump and the motor. If there is a oil window in the pump or a pump oil fill plug open this and with the engine switched off slowly pull the starter cord and see if the pump works are moving. (don't do it fast or let the engine start or there will be oil everywhere.) this will tell you if the pump is working. It could also be the diverter this wold be harder to diagnose you could go and replace the whole pump also.

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1 Answer

'94 S 10 Blazer V6 Vortec EFI. Fuel pressure good, new fuel injectors installed, fuel pump works ok. Only starts with starter fluid sprayed into air intake. Any Suggestions?


your statement is fuel pump work ok, have you tested for proper fuel pressure. just because the fuel pump works it could have less pressure needed to start the engine. maybe the fuel filter is plugged. start out by replacing the fuel filter, if this doesn't fix it, you need to pressure test the pump. even 10 psi reduction in pressure will allow the engine not to start.

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1 Answer

No water coming out of the pump


Hi
Is the pump working?
Some pressure washers need to suck the water out of a container, not pressure fed from a hose.
Check the filter for blockage.
Regaeds
Phillip

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1 Answer

Yamaha 1987 FZX 750 fuel pump problem. I have new fuel pump and fuel pump relay but the pump is still not working. The pump worked for a short while but then it stopped before even all carburators were...


Most pumps like this work on pressure drop. When the floats open the pump loses resistance pressure and resumes pumping until it feels pressure again.

May 19, 2009 | 1987 Yamaha FZX 750

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Pump is not working, pressure gauge and pressure switch have been replaced.


the automatic pressure switch does restart the water pump when the valave is open?

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1 Answer

Should you have charge pump pressure when unit is engaged 25-2012model 12-xd-31981 ser. what should charge pump pressure be


Anytime the pump is running, there should be charge pump pressure present. When the pump is in nuetral, the hot oil shuttle will usually block flow, so the the charge pump builds up pressure untill the charge pump relief opens up, the pressure setting this occurs at depends on the what the OEM wanted. When the pump strokes up, there is a pressure differential between the two work ports, which shifts the hot oil shuttle spool, allowing oil to flow across the hot oil shuttle relief valve which will have a lower setting than the charge pump relief. So in Nuetral you will generally have a higher charge pump pressure and when on stroke, you will see charge pump pressure drop 50 to 100 psi.
Visit http://hansonhydraulics.blogspot.com any time for more information.

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