car wouldn’t start at store. Had an ECM code I thought was from low battery. Took to local garage said it was fuel pump. Replaced .. still didn’t start they claimed it was hpfp. That’s under extended warranty so I took to VW. They claimed the pumps installed was no good. Bosch OE. Removed and had them install Delphi pump that advance traded me for. Dealer claims this pump is doing the same thing when they bleed it. Dropping to 4 psi.. dealer is claiming I need a third pump .. an oem Bosch.. my Bosch pump was apparently not any pump capable of pumping fuel. I’m already $800 deep in this issue. I know it’s not the pump any insite what it could be. No codes present.. just loses pressure when bled to 4 psi with every pump so far.