1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

fuel pump pressure

Discussion in 'Chevy Trucks' started by Garet, Aug 8, 2001.

  1. Garet

    Garet Senior Member
    Messages: 106

    What is the stock fuel pump supposed to put out on a 73 Chevy with a 350? Mine is only at 3 psi and my carb calls for 6.
  2. raceman6135

    raceman6135 Member
    Messages: 61

    Hey Garet:

    Most manuals (whether for the vehicle or for the carburetor) will specify 5-7 psi of fuel pressure. Any less than that and the volume decreases to the point where it will starve for fuel; any higher pressure and you'll force the needle off of the seat, overcoming the float and flooding the carburetor.

    Looks like you're off to your friendly neighbourhood auto parts store for a new pump.
  3. 75

    75 PlowSite.com Addict
    Messages: 1,382

    Replace the pump (easy to do) and then see if the truck "dying problem" from the other thread improves any.

    If it doesn't, you'll at least have eliminated one possible factor.

    When chasing down problems of that sort, it's always best to try changing just one thing at a time. Otherwise, you won't know for sure what was causing the problem - if you're lucky enough to solve it in the first place!