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Hyundai: Very low idle

  1. #1
    Nirodac
    Guest

    Very low idle

    OK, based on information I received here, I was able to replace the flooded
    float, and sort of rebuild the carb on a 1986 Excel. Put it on the car and
    it ran better than it had run in many years. Drove it for two days, no
    problems. But then, just as I was getting confident in the car again,
    another problem crops up.

    When coming to a stop, in gear, the idle just keeps dropping till the
    engine dies. Removed the battery, and cleared the computer and now the car
    seems to run well again.

    So, the questions are, 1. is there a throttle position sensor I should be
    looking at. 2. Is the computer over riding the carb settings to the point it
    kills the engine. 3. If 2, how do you over ride the computer, so that it
    learns the new settings.
    Thanks in advance for you answers.





  2. #2
    hyundaitech
    Guest

    Re: Very low idle

    There's a slow idle adjustment screw. It's been so long since I've even
    thought about working on a carburetor, I don't know where to direct you on
    the carb. There should be some info on www.hmaservice.com.



  3. #3
    Nirodac
    Guest

    Re: Very low idle

    Been to that site and looked at the info for an 88 Excel (couldn't find info
    on 86)
    "Slow ideal adjust screw"?? Does not the computer need to be in "learn"
    mode first.
    OK, let me say that I am not familiar with Hyundai technology. The last ECU
    / carb controlled car I worked on required the ECU to be placed in diag
    mode, while I did the settings, then it retained those settings when I took
    it out of diag mode. From the Hyundai tech site this appears not to be the
    case for this car, is that correct? Is it just a slow idle screw adjust?
    What's throwing me here is that I though I set it up correctly, it ran for
    two days with no trouble!



    "hyundaitech" <hotmail.com> wrote in message
    news:talkaboutautos.com... 



  4. #4
    hyundaitech
    Guest

    Re: Very low idle

    I don't recall any need to be in any special mode for setting the base
    idle. Just hot.


  5. #5
    Bob
    Guest

    Re: Very low idle


    "Nirodac Yar" <com> wrote in message
    news:Uoi3d.25567$.. 
    info 
    ECU 
    took 
    the 

    Everything you need is in the "Fuel System" chapter of the Shop Manual.
    Just follow the instructions on the tech site completely under "Service
    Adjustment Procedures". There seems to be 3 adjustment screws (SAS),
    and you're not supposed to tamper with #2. And don't forget to check the
    voltage output of the throttle position sensor. If that's off, once the
    ECU thinks it's "learned" enough, it may be relying on a faulty reading
    from it when at idle.

    Ignore all the stuff about the FBC checker, since us mere mortals
    don't have one.

    Bob
     
    on 



  6. #6
    Nirodac
    Guest

    Re: Very low idle

    Thanks, I'll give it a try


    "Bob Bailin" <com> wrote in message
    news:cilcrg$hpa$news.aol.com... 
    adjust? 
    for 
    even 
    you 




 

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