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Vroom Vroom Disease

Discussion in 'Civic and del Sol - EG and EK' started by dashinghoopdi, Dec 18, 2011.

  1. dashinghoopdi

    dashinghoopdi New Member

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    I have a 1996 Honda Civic Cx with 550,000 miles on original engine. The engine is a D16Y7 (1.5). No cel, not burning oil, Manual Trans, original clutch. When car is cold car idles perfectly. When car reaches N.O.T. and cold start system is inactive the engine fluctuates from 1000 to 2500 rpm's (vroom vroom disease) by its self. I am the original owner of the car and it is completely stock. Got any suggestions?
     
  2. eg6sir

    eg6sir Supa Mod Moderator VIP

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    vacuum leak? idle adjustment screw?
     
  3. eg6sir

    eg6sir Supa Mod Moderator VIP

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    spring in the fitv (fast idle thermo valve) under the throttle body could be stuck .. not sure if it has one though
     
  4. dashinghoopdi

    dashinghoopdi New Member

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    Thank you. If there is am adjustment screw were would I look? Is this adjustment set at the factory? As far as a vacuum leak how should I go about locating the leak? I don't have much experience in diagnosing engine problems. I will see if I can find out if the car has the FITV.
     
  5. eg6sir

    eg6sir Supa Mod Moderator VIP

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    adjustment screw is on the face of the TB... fitv would be bolted to the bottom of the TB... to check for vacuum leak, start the car..while its running spray carbon cleaner all around the intake side of the engine where there are gaskets, hoses etc.. if it starts to die out, u found ur leak..
     
    Last edited: Dec 19, 2011
  6. UNDR8D

    UNDR8D ...has a job!

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    Ya...sounds like a vac leak
     
  7. Briansol

    Briansol Admins Admin VIP

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    It could also be air in the coolant. try bleeding it (or even flushing it if you haven't done so in a while).
     
  8. UNDR8D

    UNDR8D ...has a job!

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    Air in the coolant causing a fluctuating idle???
     
  9. Briansol

    Briansol Admins Admin VIP

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    yup could be headgasket too, but he hasn't reported any brown milky oil.
     
  10. CHIPMONK

    CHIPMONK New Member

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    vroom vroom

    No coolant issues with car. No loss of coolant. No coolant in the oil.
     
  11. efhondakid

    efhondakid My name is Byron. VIP

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    My bet would be the FITV or IACV.
     
  12. wikedeye

    wikedeye Well-Known Member

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    IACV x2. Start there and then check for vacuum leaks.
     
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