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B20B Vtec. Help badly needed.

Discussion in 'Engine Building' started by Belial987, Mar 15, 2017.

  1. Belial987

    Belial987 New Member

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    I just swapped the engine in recently and wired everything properly( I assume). I wired my factory d15b7 wiring harness to use an obd2 distributor and alternator. The trouble is it idles insanely high 4500-5000 rpms. I used a b18b1 throttle body and I removed the coolant thing underneath the throttle body. I replaced the iac with a known good one and the problem still exists. I also have a chipped p28 ecu I bought on ebay, I'm not sure if that could also be an issue. If anyone has any ideas what so ever I am clueless at this point and plead for a response to help me in the right direction. Thanks
     
  2. get_nick

    get_nick These snozzberries taste like snozzberries... VIP

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    I'll ask a stupid question. How tight is your throttle cable? What happens when you loosen it all the way.
     
  3. dilbeckskate

    dilbeckskate infamous

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    sounds like a vac leak or as stated above throttle cable adjusted tight ?
     
  4. ItegraTuner

    ItegraTuner New Member

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    Did you adjust your throttle body idle screw
     
  5. DanTheHondaMan

    DanTheHondaMan Active Member

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    I learned the hard way that anytime you have that issue its either a vacuum leak or the iacv has gone bad.

    I also had put one at that worked fine before and bolted it on a new intake manifold and the thing just stopped working properly out of nowhere.

    I would check all your vacuum hoses and if its still doing it then change out the iacv
     
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