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bad idle in civic

Discussion in 'General Tech and Maintenance' started by enasnIDX, May 6, 2004.

  1. enasnIDX

    enasnIDX Junior Member

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    my shitty little D15 in my 94 civic idles bad when it isn't warmed up for a while. It revs up a little and drops continuously. Anyone with an idea what's wrong?
     
  2. turboB20hatch

    turboB20hatch Senior Member

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    but it runs fine after it warms up ???

    my car always idles low when cold but idles fine after warming up...
     
  3. civic_types

    civic_types Senior Member

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    throttle positioning sensor, intake gasket, throttle body gasket, adjustment on throttle body bolt(it sometimes becomes loose).

    Trial and error dude.
     
  4. highperboi

    highperboi Senior Member

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    check the idle air control valve on the intake manifold. if you unplug it your idle should drop and if it stops fluctuating then that is it. it will throw a code tho so you gotta clear it afterwords.
     
  5. driverunknown

    driverunknown Senior Member

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    So if the idle drops, then the iacv is faulty?
     
  6. JDMG2i

    JDMG2i Junior Member

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    check you egr valve its behind you intake manifold or see if you need radator fluid
     
  7. driverunknown

    driverunknown Senior Member

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    My Civic doesn't have egr.
     
  8. thehare

    thehare Member

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    I would just replace the Idle Air Control on it. That is most likely your problem.
     
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