2000 civic Idle problems

Discussion in 'Civic' started by Jehu, Jun 8, 2004.

  1. Jehu

    Jehu Guest

    I have a 2000 civic SiR, (manual tranny) when i come to a stop my rpms drop
    all the way down to like 200rpm when normally they are at around 750 to 850.
    they stay down for around 5 sec then gradually come back up. If I don't
    watch that they are low when i go to take off and i don't rev it, it sounds
    like my lifters are hitting :( or like a car sounds when you don't give it
    enough gas to take off.

    If anyone has any suggestions that would be great.. thanks
    Jehu, Jun 8, 2004
  2. Jehu

    Jason Guest

    A valve adjustment might solve this problem.
    Jason, Jun 8, 2004
  3. Jehu

    Jehu Guest

    I was told that this could be my TPS (throtle position sensor)... is this
    likely? and do i have to replace the whole throtle body to replace it or can
    you replace just the sensor?
    Jehu, Jun 9, 2004
  4. Jehu

    Jehu Guest

    Seems i am having a conversation with myself here ... but maybe a benifit
    for someone :)

    I took my car into the dealer and they told me that the idle doing this is
    normal? How is droping intermittently down to 200 or 300 rpm be normal?
    Can't be good for the car can it?
    Jehu, Jun 15, 2004
  5. Jehu

    Randolph Guest

    My '94 has been doing the same thing ever since it was new. Pattern is
    always the same. Starting with a cold engine, it idles high, as it
    should. Then idle gradually drops to around 400 RPM as the engine heats
    up, and the it starts climbing to around 700 on fully warm engine. Not a
    big problem, but it provides fore a few not-so-smooth take-offs (stick
    shift) if I don't pay attention to it.

    Turning on the headlights (or other large current drain) alleviates the
    problem, the Electrical Load Detector detects the higher current draw
    and the ECU bumps up idle a tad.

    Don't think the low idle causes any damage, though, but I am no expert.
    Randolph, Jun 15, 2004
  6. Jehu

    Randolph Guest

    Could be. If the TPS isn't working right, the ECU won't know your foot
    has left the pedal and that it should get into idle mode. You could try
    resetting the ECU and hope that it re-learns the proper TPS
    characteristics. On my car ('94 Civic) you reset the ECU by removing the
    fuse labeled "backup" (in the fuse box under the hood, not under the
    dash) for about 10 seconds.
    Randolph, Jun 16, 2004
  7. Jehu

    Jehu Guest

    Thanks for the info... I might look into doing that
    Jehu, Jun 16, 2004
  8. Jehu

    motsco_ _ Guest


    TPS is doubtful, or else you'd be telling us that it's very 'jerky' when
    you try to 'crawl' around in first gear, like when looking for a parking

    You haven't told us your mileage, or anything about your service
    history. You may need a new PCV, or you coolant is low, or your tach
    isn't actually working right. Valve adjustment might be a good guess,
    but not without more info. Have you tried running some different fuel
    thru it? How about injector cleaner? Do you hear any vacuum leaks under
    the hood? How often do you check / change the oil?

    Reply to group... 'Curly'
    motsco_ _, Jun 16, 2004
  9. Jehu

    Jehu Guest

    Ok.. it has 105 000km on it. Oil changed every 6000km, Coolent is good,
    don't think it is my tach cause the car actually feels rough or like it is
    idling low.

    I don't think the PCV valve has been replaced. I am the second owner of
    this car so I am only going by the service history from the dealership.
    This may be a dumb thing to say but someone else told me this... The valves
    can't be adjusted because they are hydrolic... I don't agree with this
    statement, but then again I only have limited knowledge of this type of

    I normally put in injector cleaner about once a month or so but since this
    started I have tried about 5 tanks of Premium gas instead of Regular other
    then on my wallet size. ;(

    I also dont hear vacuum noises under the hood... but I didn't mention that I
    do have a Short Ram air intake. Now this problem was occuring before it
    was installed.

    Jehu, Jun 16, 2004
  10. Jehu

    Randolph Guest

    Not dumb at all. If you have hydraulic lifters, you don't need to adjust
    the valves. However, I am pretty sure you don't have hydraulic lifters.
    Randolph, Jun 17, 2004
  11. Jehu

    Jehu Guest

    Do any civics have hydraulic lifters? if so which models
    Jehu, Jun 17, 2004
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