Why do i loose pressure after a few minutes - Dewalt DPD3100 Gas Pressure Washer

It sounds like low gas pressure.

Usually low fluid causes pressure drops. In everything. Type of vehicle and what is loosing pressure helps.

The easiest way to find an oil leak is to start with a clean engine. Clean the engine with a good degreaser (I've found the citrus based cleaners to be very good) while engine is warm (not hot) and let the degreaser sit on engine for a few minutes (follow instructions on bottle). Rinse off engine with high pressure water and let dry. Watch engine while a helper starts bike. The oil leak should be evident. The most likely culprits are a loose oil filter, oil pressure switch or an oil line, so pay particular attention to these.

need more info is there enough oil in engine? if so check oil sending unit to see if wire is loose if ok have oil pressure checked with oil pressure guage to see if oil pump is weak

run fault codes and look for sensor problems. Have a pressure test done on the fuel manifold to check fuel pump/pressure regulator and filter.

Online manual and some sources of parts at this link:


Montel Williams Pressure Cooker Manual hip pressure cooking

Put a fuel pressure gauge on it & see if you have or loose
fuel pressure

If it stays running, take it for a drive with the gauge taped
to the windshield

Fuel Pump may be worn out

there should be a oil pressure sending unit close to the filter, install a manual guage to check the actual pressure, and chack the filter mouting seal surface with a flat edge it may be warped

check the pipes havent collapsed or trapped and partially crushed