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.

2 questions one post: carb and heater core

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by pornorob, Feb 19, 2005.

  1. pornorob

    pornorob 1/2 ton status

    Joined:
    Jul 12, 2001
    Posts:
    215
    Likes Received:
    0
    Location:
    ;jkl;
    i'm pretty sure it has a rochester on it and I cant get it to idle any slower. its idling at about 1100rpm and I've turned what I think is the idle adjustment screw(right side from the front knda near the bottom) far enough out that the linkage isn't even hitting the the end of the screw anymore. I was wondering if a faulty electric choke might be the cause but thats just a blind guess. I'll get a pic of the carb and post it later today for Identification purposes.

    OK question # 2 the hoses for my heater core are not connected so no heat. I was wondering how to connect them. I see one spot to hook it up on the water pump but I need to know where to hook the other hose up. Any hints or suggestions that will make my life easier are appreciated.:D
     
  2. Muddytazz

    Muddytazz 1 ton status

    Joined:
    Jun 30, 2002
    Posts:
    20,073
    Likes Received:
    0
    Location:
    Salem, Or.
    Good way to test the binding choke theory is to take the choke off and see if it still idles really high.

    On the heater hose part, it can be connected to either the water pump, intake or radiator.
     
  3. pornorob

    pornorob 1/2 ton status

    Joined:
    Jul 12, 2001
    Posts:
    215
    Likes Received:
    0
    Location:
    ;jkl;
    here is the carb. I took the choke off and it didn't do anything. is it possible that it was rejetted with a jet that are too big? don't really know much about carbs just taking a stab in the dark.

    p1010914.JPG
     
  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
    Where in the picture do you think the idle control screw is?

    BTW, that sucker is filthy. Go buy a can of carb cleaner and clean the outside and inside of that unit....
     
  5. pornorob

    pornorob 1/2 ton status

    Joined:
    Jul 12, 2001
    Posts:
    215
    Likes Received:
    0
    Location:
    ;jkl;
    I think thats where it is. (yellow arrow)

    idlescrew.JPG
     
  6. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    Yup, that's where it is. You're saying that the screw is backed off so far it's no longer touching the linkage? Can you manually pull the throttle linkage back? Is there a chance that your throttle cable is binding somewhere?
     
  7. pornorob

    pornorob 1/2 ton status

    Joined:
    Jul 12, 2001
    Posts:
    215
    Likes Received:
    0
    Location:
    ;jkl;
    it takes alot of effort to pull the linkage any further than ii already is. the cable actually moves really easily. I may try disconnecting the throttle cale and see what happpens then.
     
  8. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    Check all you vacume hoses and carb base for vacume leaks.
    Check to make sure the choke is open all the way and the high idle adjustment screw on the choke is not hung up on the high idle cam.
     
  9. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    Hmmmmmmmm.......never thought of that. Are you sure that the fast idle linkages on the passenger side of the carb aren't sticky or jammed up?

    Man, you really need to clean that carb......:deal: :rotfl:
     
  10. pornorob

    pornorob 1/2 ton status

    Joined:
    Jul 12, 2001
    Posts:
    215
    Likes Received:
    0
    Location:
    ;jkl;
    well I checked the high idle screw and all the linkage that side of the carb everything moves freely. disconnected the throttle cable.... no prob there. I've heard of spraying carb cleaner to find vacuum leaks. Can you use WD40( I don't have any carb cleaner) instead?
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,170
    Likes Received:
    1,380
    Location:
    E-town baby!
    Left side of the pic I see a spade connector that should be connected to the choke housing. Without 12 volts there the choke won't open and the fast idle won't kick down.

    Rene
     
  12. pornorob

    pornorob 1/2 ton status

    Joined:
    Jul 12, 2001
    Posts:
    215
    Likes Received:
    0
    Location:
    ;jkl;
    that was disconnected to check to see if the choke was working. it is connected now. I manually moved the linkage so that it would kick down from high idle and it made no difference. I'm at a loss.
     
  13. personaltrainer

    personaltrainer 1/2 ton status

    Joined:
    Nov 4, 2004
    Posts:
    178
    Likes Received:
    0
    Location:
    Atlanta GA
    No wd40 - go buy the carb cleaner. It's cheap and really works well. You should always have ity around anyway. Spray around the carb base, intake manifold base and don't forget the exhust manifold as well. Good luck
     
  14. Cricket

    Cricket 3/4 ton status

    Joined:
    Nov 29, 2004
    Posts:
    8,224
    Likes Received:
    0
    Location:
    Colorado
    That looks like the M2M series 2 barrel. If you have a chilton or haynes manual you can look under fuel and exhaust systems for step by step instructions.
     
  15. pornorob

    pornorob 1/2 ton status

    Joined:
    Jul 12, 2001
    Posts:
    215
    Likes Received:
    0
    Location:
    ;jkl;
    yeah I need to get me one of those....... manuals that is ....
     
  16. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,979
    Likes Received:
    189
    Location:
    Roy WA
    Thats a rochester Q-jet. (4 barrel)

    Is the throttle kicker by any chance still sticking out and not retracting? It's the solenoid above the idle speed screw.
     
  17. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    Yeah, that's another possibility, eh?

    Pornorob- the solenoid that Dorian is referring to is the the little can with the blue wire/red spade connector running to it. If you look carefully, there's what looks like a bolt head touching the little green-colored actuator arm.

    I'm pretty sure that the solenoid kicks the idle up when the air conditioner or defrost is turned on. If it's "stuck on", then the idle will be stuck in the elevated throttle position, which may explain why you can't get the sucker down to curb idle.

    Sorry, I don't know how to troubleshoot the solenoid. I DO know that last year I didn't fully turn my A/C off and my idle kept kicking up for no reason, or so I thought.....:doah:
     
  18. Cricket

    Cricket 3/4 ton status

    Joined:
    Nov 29, 2004
    Posts:
    8,224
    Likes Received:
    0
    Location:
    Colorado
    It Just Gets Worse

    :eek1: How in the friggin heck did I overlook that. Embarrasing, friggin embarrasing - Time for early retirement.

    http://www.sptimmy.com/sounds/timmyshhh.wav
     
    Last edited: Feb 19, 2005
  19. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    Do you know your advance hose is disconnected ?
     
  20. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    That's what I call an eagle eye, Pauly!!!!

    Figure it may have something to do with wierd idle????:rotfl: :rotfl:
     

Share This Page