Printable View
Suspected bad "NEW" fuel pump. Have to prime pump for start,pressure drops to zero immediately upon key off.(suspect bad anti-backflow valve in pump assembly) Removed fuel pump from tank and and blew into output nozzle.There was no resistance. You think this is an indication of anti-backflow failure?
Certainly sounds logical to me.
Pressure bleeding down is generally a bad back flow valve. Better take it back
Thank You. Your rapid response is appreciated.
Removed old fuel pump serviced it and put it back in. Fuel pressure went from 50 to 15 so that was a bust.Bit the bullet and bought new pump again. This one is working fine. After original pump stopped holding pressure when off, I got a replacement that also did the same thing, i returned for exchange and the exchanged one showed same symptoms so i figured it was a different problem. I troubleshot for a year. then decided to take pump apart to find anti back flow valve, I screwed pump pressure up and had to get a new one. New one works fine. It was defective replacements all the time.