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Check engine light 3A after flash

zzy7164@hotmail.comzzy7164@hotmail.com Posts: 3Verified User
in EX 400

Hi:

I have a 2020 Ninja 400 with a full Akrapovic exhaust system and the ABS removed. The ECU number is 21175-1332.

Initially, I used the unrestricted 2020rev 1332 ECU map for my first time flashing, and it worked well without any check engine light. However, I noticed that when I decelerated between 5000-6000 RPM, the motorcycle started popping and backfiring. I have a road test coming up so I decided to switch back to the stock map. After flashing the stock map from the public file section in Flash Tune, I received a check engine light with code 3A.

I am wondering if anyone has encountered the same problem and knows how to fix it.

Also, does anyone knows how to deal with crazy popping and backfiring?

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  • zzy7164@hotmail.comzzy7164@hotmail.com Posts: 3Verified User

    Check engine light 3A after flash

    zzy7164@hotmail.comzzy7164@hotmail.com

    Hi:

    I have a 2020 Ninja 400 with a full Akrapovic exhaust system and the ABS removed. The ECU number is 21175-1332.

    Initially, I used the unrestricted 2020rev 1332 ECU map for my first time flashing, and it worked well without any check engine light. However, I noticed that when I decelerated between 5000-6000 RPM, the motorcycle started popping and backfiring. I have a road test coming up so I decided to switch back to the stock map. After flashing the stock map from the public file section in Flash Tune, I received a check engine light with code 3A.

    I am wondering if anyone has encountered the same problem and knows how to fix it.

    Also, does anyone knows how to deal with crazy popping and backfiring?

    Just correct some info. I got crazy popping and afterfire (shoot blue flame) when I roll off the throttle

  • mike@ftecu.commike@ftecu.com Posts: 177Staff User
    zzy7164@hotmail.comzzy7164@hotmail.com

    https://forum.ftecu.com/discussion/1573/check-engine-light-3a-after-flash

    Just correct some info. I got crazy popping and afterfire (shoot blue flame) when I roll off the throttle

    Hello

    You may need a custom map from a good dyno tuner. We do have an updated map for that ECU I believe in the tuning suite that you could try. The decel popping is cause from the air injection system when not blocked off.

  • zzy7164@hotmail.comzzy7164@hotmail.com Posts: 3Verified User
    mike@ftecu.commike@ftecu.com

    https://forum.ftecu.com/discussion/comment/5355#Comment_5355

    Hello

    You may need a custom map from a good dyno tuner. We do have an updated map for that ECU I believe in the tuning suite that you could try. The decel popping is cause from the air injection system when not blocked off.

    @mike@ftecu.com

    Could you tell me the map's name? I also import the power command V's full ak system fuel map to see if it can reduce the blue flame

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