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.

A gremlin jumped into my carb today........

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Can Can, Apr 10, 2001.

  1. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    VERY WIERD!!!!!!!!!!!! Today I fired the K5 up. It jumped to high idle right away. After about 2 minutes I went out and kicked her down to mid-idle(around 1000RPMS), and that's when the FUN started......

    The engine would start to choke itself out, and after about 20 seconds of slowly losing RPMs(down to about 350-400), it suddenly jumped back up to mid-idle. This happened THREE times in about 5 minutes, and then ran fine.

    <font color=red>WTF?????!!!!!!!</font color=red> <font color=blue>WTF??????!!!!!!</font color=blue>

    Can somebody please explain what's happening????? It's a 4bbl electric choke Quadrajet...........





    <font color=red>PHOTO ALBUM-</font color=red> <A target="_blank" HREF=http://albums.photopoint.com/j/AlbumList?u=1289798>http://albums.photopoint.com/j/AlbumList?u=1289798</A>.......<font color=blue>TRUCK & HIKING PICS</font color=blue>
     
  2. muddin4fun

    muddin4fun 3/4 ton status

    Joined:
    Feb 19, 2001
    Posts:
    5,644
    Likes Received:
    0
    Location:
    N Texas
    Sounds like the gremlin is messing with the idle control solinoid or the sensor it reads from (if there is one).
    That is a weird one! A beebee gun should take him out though! LOL

    [​IMG]
    <A target="_blank" HREF=http://k5chevyblazer.homestead.com/home.html>http://k5chevyblazer.homestead.com/home.html</A>
     
  3. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    I just flipped through my Haynes manual and couldn't find any mention of an "idle control solenoid". Is my 84 equipped with one?



    <font color=red>PHOTO ALBUM-</font color=red> <A target="_blank" HREF=http://albums.photopoint.com/j/AlbumList?u=1289798>http://albums.photopoint.com/j/AlbumList?u=1289798</A>.......<font color=blue>TRUCK & HIKING PICS</font color=blue>
     
  4. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    Any more ideas, guys?? Hmmmmmmmmm- Where's Grim when you need him? Probably changing a diaper!!!!!!LOL



    <font color=red>PHOTO ALBUM-</font color=red> <A target="_blank" HREF=http://albums.photopoint.com/j/AlbumList?u=1289798>http://albums.photopoint.com/j/AlbumList?u=1289798</A>.......<font color=blue>TRUCK & HIKING PICS</font color=blue>
     
  5. muddin4fun

    muddin4fun 3/4 ton status

    Joined:
    Feb 19, 2001
    Posts:
    5,644
    Likes Received:
    0
    Location:
    N Texas
    I think that's what it's called. I'm prolly wrong then. *calling* Grim! Oh Grrriiimmmm!!!

    [​IMG]
    <A target="_blank" HREF=http://k5chevyblazer.homestead.com/home.html>http://k5chevyblazer.homestead.com/home.html</A>
     
  6. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

    Joined:
    Feb 17, 2000
    Posts:
    7,385
    Likes Received:
    0
    Location:
    Atlanta
    Been here done this..the electric choke element sounds like it fried and the choke is stuck on and flooding out the engine. First check that your getting 12 v on the wire to the choke if you are then the heater in it has probably failed. I forgot what the ohm rating is when it's good. Maybe somebody else will know and you can meter it before spend the $35 for a new one. Also a bad electric mix solonoid could ase this issue but not sure if that was on your truck or not. If it is even if one wire is getting 12v the other wire on the mix control runs to a thermostatic switch on the water neck and you need to meter that to see if it is activating the mix solonoid.


    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    Your '84 should definitely NOT have an MC (mix control) solenoid, unless maybe it was originally a CA truck.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  8. Blazer_Boy

    Blazer_Boy 1/2 ton status

    Joined:
    Dec 16, 2000
    Posts:
    1,669
    Likes Received:
    0
    Location:
    Sioux City, IA, USA
    I think I'm in the midst of the same prob with my '82s electric choke. 90% runs great but every now and then the exhaust is darker and it runs rough. Get the truck warmed up all the way and its fine. Or just sometimes turning it off and starting it again. It was doing something similar to what the original mentioned, I pulled off the air cleaner and somebody removed the hose going to the manifold for my thermal vacuum, no heated air for the intake. I've got the carb rebuilt, new distributor, MSD wires, AC plugs, so its gotta be the choke.

    [​IMG]
     

Share This Page