I am having problems . When I start the preasure washer it is building up preasure in the pump . Low preasure out the nozzle tip .When I release the trigger the engine will die because of the preasure build up. The water inlet is is very hot. Even though I have good water preasure going to the preasure washer. I can remove the nozzle and pull the triger and still low preasure comming out of the hose.