Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

87 truck dual tank ?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 4x4k20, Mar 22, 2006.

  1. 4x4k20

    4x4k20 1/2 ton status

    Joined:
    Mar 17, 2001
    Posts:
    1,699
    Likes Received:
    0
    Location:
    williamson ga.30292
    i have a 87 k30 it runs fine on the right tank .but as soon as i hit the switch to the left side tank it dies . is it the pump or what ?
     
  2. Goose

    Goose 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,127
    Likes Received:
    1
    Location:
    South Central Kansas
    Prolly the switch. Or you have no gas in the left tank. hehehe

    On my '85 I had a leak in some of the lines for the right side. I replaced them and could tell I wasn't the first. Seems to be common problem. Was kinda a pain getting to all the fittings.

    I haven't had problems with the switch, but I hear it can be a problem.
    someone should chime in.
     
  3. jarheadk5

    jarheadk5 1/2 ton status

    Joined:
    Mar 6, 2000
    Posts:
    4,389
    Likes Received:
    0
    Location:
    PA
    Tank selector valve might not be making it all the way to the left-tank position internally.
     
  4. tiny2085

    tiny2085 1/2 ton status

    Joined:
    May 14, 2004
    Posts:
    160
    Likes Received:
    0
    Location:
    Two-will-uh
    on my 80' K30, the left tank reads full, the needle moves, but it is actually empty. It sounds like the tank selector isn't working correctly.
     
  5. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

    Joined:
    Jun 16, 2000
    Posts:
    1,932
    Likes Received:
    0
    Location:
    Sims, NC
    Johnny,

    Being it is an '87, there is a fuel pump in each tank. If the pump is bad the fuel pressure drop will kill the motor almost instantly. Check to make sure you have power to the pump on that tank when you have the switch to that side. If you have power there then check to see if you have any fuel pressure at the throttle body. No pressure and you will experience the joy of replacing an in tank pump! Good luck!

    Mike
     
  6. 4x4k20

    4x4k20 1/2 ton status

    Joined:
    Mar 17, 2001
    Posts:
    1,699
    Likes Received:
    0
    Location:
    williamson ga.30292
    hey mike thanks for that info. but it really wasnt the pump it was the little 2 inch rubber fuel hose that connects the fuel pump to the sending unit itself it was rotted into.and wasnt sucking the fuel. but needless to say i had to drop the tank anyways [which is a real p.i.a ] by yourself and being an old fart but its working now . :doah: :mad: :crazy: :haha:
     

Share This Page