No announcement yet.

AFR dropping to 3.8 after letting off throttle ?!

  • Filter
  • Time
  • Show
Clear All
new posts

  • AFR dropping to 3.8 after letting off throttle ?!

    Hello my AFR appears to be dropping to 3.8 after letting off the throttle. I have not changed any connections and have just updated the firmware. 2019 C43 - JB4 and BCM
    Attached Files

  • #2
    Update, logged Map0 and it happened on that map as well.


    • #3
      Fuel is cutoff during deceleration. It's a normal reading. In most firmware we change it to show 25.5:1.
      Burger Motorsports
      Home of the JB4 the worlds most popular turbocharged tuning system!

      It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.