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1990 fuel pressure

Discussion in 'Chevy Trucks' started by roteye38, Nov 28, 2010.

  1. roteye38

    roteye38 Member
    Messages: 40

    on my 1990 5.7 checked the fuel pressure it goes up to 13 pounds when i turn the key on when the pump shuts off the pressure goes right down to 0 when i start it up and let run it stay at 13 idlies good feels sluggish when in drive and under a load
     
  2. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    It should be around 35 psi. if I'm not mistaken but either way you need a fuel pump.
     
  3. roteye38

    roteye38 Member
    Messages: 40

    chiltons says 9-13 pounds
     
  4. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    I stand corrected 12-15 says Google and you, if you have an Advance Auto near you the will scan it to see if there are any codes.
     
  5. 03silverado

    03silverado Junior Member
    Messages: 8

    Yes, 9-13 is correct. It should hold pressure for a while. Under hard acceleration driving down the road, what is your pressure?
     
  6. roteye38

    roteye38 Member
    Messages: 40

    pressure stays at 13 at idle didnt drive it to see
     
  7. 03silverado

    03silverado Junior Member
    Messages: 8

    Drive it and see. I will bet either plugged filter, or pump that can make the pressure but not keep up with the volume. If it drops under 8 while driving, get a new filter and retry. If it still drops, new pump time.