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  1. #1
    Join Date
    Jul 2018
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    Sabah
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    AFR lean out at low RPM

    Hi there,

    I have my Silvia s15 upgrade and I have few issue with the engine at lower RPM (below 2000RPM). My car have EFR turbo kit from full race. The turbo is EFR 7163 with twin scroll manifold and direct line intercooler. I use Plazmaman plenum with 75 mm throttle body. The intake is standard Silvia s15 and using the Silvia s15 idle controller. However, I am using BC cams 270 Deg for intake and exhaust. The problem is when it is less than 2000 RPM it jerking and the power response very weak where the EFR lean out (above 16). It is a nightmare in traffic where the engine sometime can stalled. Also, when the engine heated up the RPM go up to from 1000 to 2000 RPM. Anyone have the same problem and share some thought.

    Thanks
    Last edited by muin63; 19-01-2019 at 08:34.

  2. #2
    Join Date
    Nov 2013
    Location
    Essex
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    sounds like a lambda sensor problem

  3. muin63 Likes this post.

  4. #3
    Join Date
    Nov 2009
    Location
    herts,uk
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    AFR lean out at low RPM
    @Peglio13

    AFR lean out at low RPM

    Thatís a good shout . I had this on my car before and turned out to be that probably best to have it checked over


    Sent from Big Bear Kustoms Ltd using tapatalk
    Last edited by pegliobaglio; 18-01-2019 at 08:36.

  5. muin63 Likes this post.

  6. #4
    Join Date
    Jul 2018
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    Sabah
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    Thanks Janus,

    I will get o2 sensor check.

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