Nightprowler1019
Newbie
Been having issues the last year with my 97 k1500. Long story short fuel pressure is 48 at idle which I know is way to low. 54 koeo. Raised rpm goes down till 1500 then slowly goes up to 52. Shut truck off or after priming system pressure drops fast to 20-30. I crimped the return line pressure went to 80-90 then it dropped really slow when I released it. No leaks, new delphi fuel pump, new filter, delphi spider and regulator last summer. Checked relay, grounds and power to the pump which it gets 11.96 volts when priming. Im kinda at a loss as of where to go next any help would be greatly appreciated