Need help with a '95 Hyundai Elantra. How do I check idle speed?

Discussion in 'Hyundai Elantra / Lantra' started by leviathan, Jun 29, 2004.

  1. leviathan

    leviathan Guest

    Hi. I have a '95 Hyundai Elantra withan automatic transmission. It
    doesn't have a tachometer (the instrument that measure engine speed).
    The problem is that when the car is going from one gear to the next,
    sometimes the car feels like it's going to turn off. How would I go
    about checking the engine speed on idle if the car has no tachometer? I
    have a multi-meter by the way. Is there anywhere that I could connect my
    meter in order to measure the engine speed? Would I have to measure the
    idle speed with the transmission is Park or with it selected in Drive?
    Need help bad. Thanks
    leviathan, Jun 29, 2004
  2. leviathan

    hyundaitech Guest

    You can check it with an inductive tach. If you don't have a setting for
    distribtorless ignition, you'll need to divide the results by two.

    If this occurs when the accelerator is not applied, check the idle switch.
    This switch is to be closed when the throttle is closed and is to open
    when the throttle just begins to open. Some people try to adjust the idle
    by adjusting the throttle cable or throttle stop to hold the throttle open
    more. This just confuses the computer because the idle switch remains
    open all the time and it thus never tries to keep the engine idling. If
    the throttle cable has no slack, give it some. If the car still does not
    idle correctly, check the idle actuator. It has three rows of pins. The
    resistance from the center to each of the outer pins in each row should be
    about 30 Ohms. Anything much more or less and the idle actuator is bad
    and should be replaced. If you can remove the actuator, take it out and
    inspect for coolant leaking onto it. The gasket between the halves of the
    throttle body can leak coolant and cause an open or short in the idle
    actuator. If coolant is leaking onto it or it is shorted, fix it pronto.
    A shorted idle actuator WILL fry the computer.

    There are many details and better descriptions on this at Select "Shop" for the shop manual and then select
    your vehicle. The items you're looking for will be in the fuel section.
    Unfortunately, a scan tool is necessary for some of the adjustments.
    hyundaitech, Jun 29, 2004
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.