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jerking and sputtering after doing a log

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  • #1

    jerking and sputtering after doing a log

    hope someone can help out. right after doing a log my car starting jerking and sputtering when I hit the accelerator between 60-80 mph.the log was in map 2 and it did it also in map 1 and zero. I have hks plugs, BOV, 93 octane, and K&N intake. the K&N was throwing a CEL on before installing the jb4 but after the log it went off. I show no codes on jb4. I did notice my AFR was a lot higher at high rpm than my log yesterday. hope someone has some input to help out.
    Attached Files
    Last edited by Rwqdan; 06-08-2023, 01:46 AM.
    Tags: None
  • #2
    Is this car on an ECU flash as well? It is going dangerously lean.
    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.

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    • #3
      No it’s not. You replied to my yesterday log and said it looked normal. I logged again today and this is what happened. Went to ****. Could it have been the BOV getting stuck open? At mechanic now trying to figure out problem.

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      • #4
        If a BOV stuck open it would go dead rich. The log you sent yesterday does look fine, this one does not. But please keep it to one thread as now it can be hard for us to keep up with who we are talking to.
        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.

        Comment

        • #5
          Originally posted by Cannon @ BMS View Post
          If a BOV stuck open it would go dead rich. The log you sent yesterday does look fine, this one does not. But please keep it to one thread as now it can be hard for us to keep up with who we are talking to.
          will do. any idea what the issue could be?

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