why does my new fuel show 50lbs pressure then after i tried starting it i can only get 20lbs pressure ive done all my checks for the power and relay i have 12v and relay is working

20

Asked by Aug 13, 2016 at 02:02 PM about the 2000 Chevrolet C/K 2500 LB HD 4WD

Question type: Maintenance & Repair

2 Answers

32,415

O-ring or seal may have slipped off or misaligned during install, fuel pickup dirty or corroded/broken section of tubing may be sucking air instead of fuel. If you have all power to fuel pump and are checking fuel pressure during cranking then it's down to the fuel pump not working properly. 50PSI is also the minimum needed and you say it drops from that after initial power on, I'd recheck all your connections/orings/filter element etc.

32,415

This post might help you: http://www.batauto.com/threads/98-chevrolet-k2500-fuel-pump-inop-low-pressure-5-7l-engine.9959/

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