1986 FJ60 Idle Problems

Discussion in '60-Series Wagons' started by Double D, Jun 20, 2005.

  1. Double D

    Double D

    Messages:
    4
    Likes Received:
    0
    Joined:
    Jun 20, 2005
    My '86 FJ60 runs fine at highway speed, but starts reving and eventually dies when in neutral.

    My mechanic thinks it needs a carb. rebuild. Any suggestions?
     
  2. Liam

    Liam

    Messages:
    4,548
    Media:
    31
    Albums:
    4
    Likes Received:
    11
    Joined:
    Feb 10, 2005
    Location:
    in the nappy dugout
    Could be a number of things, but sounds like either the carb or the fuel pump fuel pump could be going.
     
  3. chitown40

    chitown40

    Messages:
    2,112
    Likes Received:
    24
    Joined:
    Feb 9, 2004
    Location:
    Buffalo Grove, IL
    reving? or sputtering?

    Need more info to help you out... Does your truck basically not idle at all?
     
  4. FJ40Jim

    FJ40Jim The Cruiser Whisperer SILVER Star

    Messages:
    10,352
    Media:
    1
    Likes Received:
    2,719
    Joined:
    Sep 26, 2003
    Location:
    Lancaster, Ohio, USA
    At the risk of oversimplifying:
    Find a mechanic who can definitively diagnose what is wrong and what steps should be taken to repair it.
     
  5. NocalFJ60

    NocalFJ60

    Messages:
    3,550
    Media:
    6
    Albums:
    1
    Likes Received:
    6
    Joined:
    Aug 2, 2004
    Location:
    San Francisco Bay Area
    I would check all the vacuum lines hooked to the inside of the carb and if you still have all the orginal vacuum hoses I would replace them with OEM or silicone hose. After I replaced mine it smoothed out the idle, there is less strain on the engine since it doesn't have to overcome the small leaks.

    Check your idle speed too. I would focus on the carb.

    Goodluck
     
  6. Double D

    Double D

    Messages:
    4
    Likes Received:
    0
    Joined:
    Jun 20, 2005
    On it's own,while in neutral or with the clutch pressed, the engine revs up to around 3000 RPMS, slows down to 800 RPMS, revs to 2900, slows to 700, revs to 2800, slows to 600 and continues until it eventually idles down and goes dead.

    We worked with the idle adjustment and made it where it won't idle low enough to go dead, but it still goes through this pattern of "pulsing".
     
  7. beaufort-fj60

    beaufort-fj60

    Messages:
    4,511
    Media:
    10
    Albums:
    1
    Likes Received:
    7
    Joined:
    Feb 5, 2005

    the "idle" screw you were turning was it on the back top/bottom or on the front.
     
  8. Mike S

    Mike S

    Messages:
    2,537
    Likes Received:
    18
    Joined:
    Aug 19, 2003
    Jim has the right answer. Get someone who can put their hands on the truck can diagonose the problem and reccommend a fix. A lot of 'mechanics' these days only read diagnostic computer error codes, and almost never see a carb.

    M
     
  9. dogboy2

    dogboy2

    Messages:
    996
    Likes Received:
    9
    Joined:
    Jul 8, 2004
    Location:
    Portland, OR
    If you are doing the work yourself, you may as well start from a known base -- this is my fail/safe: try doing a complete tune-up including a valve adjustment especially if one hasn't been done in a while. From there, you can start targeting specific systems, i.e. vacuum system, fuel delivery system, carb, etc... and making repairs as necessary until you find your sweet spot and the truck runs like a top.

    A failure in one system or part may be masking others in related systems, so it really can come down to a matter of trial and error, through a logical process of elimination.

    This doesn't answer your question specifically, but when there are so many variables at play, this is just one method that may help...

    -dogboy- '87 FJ60
     
  10. FJ40Jim

    FJ40Jim The Cruiser Whisperer SILVER Star

    Messages:
    10,352
    Media:
    1
    Likes Received:
    2,719
    Joined:
    Sep 26, 2003
    Location:
    Lancaster, Ohio, USA
    The engine can't run up to 3K RPM with the throttle closed. Therefore there is either something opening the throttle on the carb, like the AC idle up pot that is inadvertently connected to the EGRVM, or else there is another large source of intake air, like a leaky brake booster or...?

     
  11. dd113

    dd113

    Messages:
    2,922
    Likes Received:
    6
    Joined:
    Jun 13, 2003
    I just had a 60 doing exactly that you describe. The AC idle up was working but too well; the AC solinoid was not working correctly and was "pulsating" the vac so it would go up then down.

    Does this happen all the time or just when the AC is on?
     
  12. Double D

    Double D

    Messages:
    4
    Likes Received:
    0
    Joined:
    Jun 20, 2005
    It has always "pulsed" slightly when the AC was on and in neutral.

    Whats happening now is much more exagerrated and doing it when the AC is off.
     
  13. Pluton

    Pluton

    Messages:
    418
    Likes Received:
    1
    Joined:
    Oct 12, 2004
    At least get the Emissions Manual and make sure all hoses are hooked up correctly. If you have the time, it's cheaper to do this yourself rather than at $60/hour for the tech. If you don't have the time, do as Jim C. advised: find a tech w/ smog-era carb knowledge. Good luck.
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.