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.

fuel gauge

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dutterback, Jan 17, 2001.

  1. dutterback

    dutterback Registered Member

    Joined:
    Mar 12, 2000
    Posts:
    22
    Likes Received:
    0
    Location:
    Missouri
    could anyone tell me what the most likely cause for the fuel gauge on my 87' suddenly going way past full and refusing to work?
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,977
    Likes Received:
    189
    Location:
    Roy WA
    I *think* that means the ground is bad for the sending unit. I was looking through my service manual last night, and I just skimmed the fuel gauge check procedure. Each problem associated (incorrect reading, over full, etc) had only one cause, but I think overfull is ground...someone else will probably know for sure.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://yeagerd.home.mindspring.com/index2.html>http://yeagerd.home.mindspring.com/index2.html</A>
     
  3. bking

    bking 1/2 ton status

    Joined:
    Jan 4, 2001
    Posts:
    176
    Likes Received:
    0
    Location:
    Alaska /Here from Ireland in Dec 2000
    How much gas did you put in it?
    I know with my 85 when I put 50 bucks in it, it stays about half an inch past full for days, then drops like hell.!
    Might be a sticky float in the gas tank?
     
  4. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    it is a ground problem also check the sending unit and make sure that the wire is pluged into the top off the sending unit they come off very easily also do a search on this topic to get more info

    s.smith 77blazer lookin 4 mud
     
  5. dutterback

    dutterback Registered Member

    Joined:
    Mar 12, 2000
    Posts:
    22
    Likes Received:
    0
    Location:
    Missouri
    I checked the plug it is o.k. (this is really conveniant with a hole in the floor of your blazer) I have a plug with a purple and a black wire, and also one going to ground. they all appear o.k. could it be a ground at the gauge? thanks
     
  6. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    yes someplace between the gage and the sending unit you have a broken conection is what it sounds like to me (i could be wrong) now the fun part tracing it out lol

    s.smith 77blazer lookin 4 mud
     
  7. Cmoe

    Cmoe 1/2 ton status

    Joined:
    Feb 19, 2000
    Posts:
    2,884
    Likes Received:
    0
    Location:
    Mesa,AZ
    Disconnect the pink with going to the tank and see what your gauge does? Then ground it and see if there is a change? If there isn't any difference between the two it sounds like the sending unit is bad,,,,,

    C'moe

    <font color=black>the blazer is "Back in Black"
     
  8. Sax Art

    Sax Art Registered Member

    Joined:
    Dec 12, 2000
    Posts:
    49
    Likes Received:
    0
    Location:
    Western, Wisconsin
    Mine does the same thing in my 1991 suburban.

    I can tap on the clear plastic gauge face, and make it go to where it should, so I pulled the dashboard apart, and I found that the back of the gauge plugs into a receptical inside the dash like an electrical plug in a house does. So the connection on mine is bad there. I don't know how to fix it, so if you figure it out, let us know!
     

Share This Page