2005 saaburu jdm ej20 swap, bad idol

Discussion in 'Subaru Impreza' started by Praben, Nov 18, 2020.

  1. Praben


    Nov 18, 2020
    Likes Received:
    Hey everyone,

    I recently swapped my 92x linear from an ej25 to a jdm ej20.

    This sawp went fine the car runs down the highway fine.

    When i stop at a light and drop the rpm to idol the engine almost stalls (100/200) then goes back up to 500. When the car is coasting in neutral this almost stall does not happen.

    I do not have any o2 sensors hooked up to the exhaust.

    I dont know what codes it is throwing.

    Doyou guys thins its a spark problem? Fuel delivery problem? I think its a computer calibration problem.
    Any advice?
    Praben, Nov 18, 2020
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