B18C high idle, slight hunt

Discussion in 'Engine' started by Dannyboy205, Jan 17, 2018.

  1. Dannyboy205

    Dannyboy205 Donator Donator

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    I hope so! Keep you updated! Thanks for all the help!
     
  2. Dannyboy205

    Dannyboy205 Donator Donator

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    So i replaced the throttle body. Still no better!

    So far i have

    Replaced the throttle body
    Iacv
    Set the tps and tested it
    Checked the timing + ignition timing.

    So when i start the car. It runs and idles close to 2000. And once it warms up it settles at about 1500 with a slight hunt.

    If you blocked off the iacv hole the idle drops to just above stalling.

    If you block of the throttle body with a flat plate. The engine dies. Which should rule out another air leak.

    The idle screw is all the way in.

    There are no EMLs. Car runs and drives ok.

    My next idea is to block every vacuum pipe. Incase 1 is providing a very small air leak.

    The only thing i havnt checked is a bad coolant temp sensor. Now the guage comes up to temp and the fan comes in and out. But i suppose the iacv opens more on cold start to bump the idles, so it could be giving me the issue?
     
  3. Dannyboy205

    Dannyboy205 Donator Donator

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    Ive just had a thought. MAP sensor. When i took the plugs out they where black from running rich and they had only done 50 miles! Next thing to test
     
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  4. jesse888

    jesse888 Ek9+Turbo+Nurburgring= Heaven Staff Member Donator

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    minor leak at the MAP sensor perhaps. surprised it runs smoothly like that though
     

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