Rough Idle in 1999 Prelude

Discussion in 'Prelude' started by MaWeiTao, Apr 6, 2005.

  1. MaWeiTao

    MaWeiTao Guest

    I have a 1999 Prelude, non-SH. Quite some time ago I got a check engine
    light. I pulled the code and it indicated a problem with the CKP/TDC
    sensors. Despite that the car ran fine.

    Last week I found the car to be idling roughly; it's RPMs were lower than
    they should be. Once I got home, with the car sitting in idle the check
    engine light started flashing. I checked the code again and it returned the
    same one for those sensors.

    So I finally had the sensors replaced. As I approached home the check engine
    light came on yet again and when coming to a stop the engine was idling
    roughly. When sitting at home I revved the engine slightly; it hesitated a
    bit and the revs then dropped back and the car died. I am still able to
    start the car and drive it around.

    The thing to note is that the car is fine when cold; it starts idling
    roughly when it gets warm. When driven the car seems to run more or less
    fine; I get the feeling that it isn't quite right, but the problem is really
    only exhibited when I come to a stop and the car is idling.

    I am hoping someone has any idea what might be causing this. Any advice
    would be appreciated.
    MaWeiTao, Apr 6, 2005
  2. yes its because you bought a honda ;) just kidding that sounds like a TPS my
    friend. They are pricey go to the junk yard and see if you can find one
    decently priced.
    Myrone Bagalay, Apr 6, 2005
  3. if you changed the tps allready make sure its adjusted properly it must be
    addjusted perfectly if its a hair off it will act funny apon acceloration
    and idel.
    Myrone Bagalay, Apr 6, 2005
  4. MaWeiTao

    JEHU Guest

    I had a low/rough idle on my 2000 Civic SiR, Replaced Iac Valve (didn't
    fix), had base idle adjusted to highest level (didn't fix), finally I
    cleaned out the throttle body with some throttle body cleaner (or carb
    cleaner) and the idle was good. There was a buildup of carbon all along
    the bottom edge of the butterfly flap causing at idle to idle lower due to
    not enough air getting past.
    JEHU, Apr 10, 2005
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.