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Thread: Is this and easy fix? Manual s/c after shift hesitation

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  1. #1
    Junior Member
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    Default Is this and easy fix? Manual s/c after shift hesitation

    My car has been supercharged and dyno tuned. Now that I have gotten over the fun of all that mo’ power baby! I noticed a drivability issue.

    I noticed with about 25% constant throttle position, after every shift the timing is retarded to about 8deg for about 1.5 seconds then it will jump to where it should be 20 to 30 deg. I can feel the car begin to accelerate harder after the 1.5 seconds after the shift, even though the pedal position is constant after the shift. I usually shift when I hit around 3,000 to 2,500 rpm, it’s when the hesitation is the most pronounced. It will do this consistently.

    I have gone through all the tables and have a basic understanding of what that do. I do not see any one table that might see to a fix in this drivibility issue. The tuner shop just seems too busy to be bothered over my concerns anymore so I’m looking at this as motivation to learn to tune myself. I have been going through the tables for a few days to see what all was changed and I just can’t put my finger on it.

    Has anyone ever has this happen and what was needed to fix it?
    Last edited by ThunderDan74; January 30th, 2022 at 08:54 PM. Reason: Most of post missing after submittial

  2. #2
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    so I figured out how to do a scan and I see my part throttle APP is not matching the ETCTP. What should i do next?
    C7 flrst gear launch Torque 2.pld

  3. #3
    Joe (Moderator) joecar's Avatar
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    Also look at the GM.STATExx, pids one of them will indicate the reason for timing pull.

  4. #4
    Joe (Moderator) joecar's Avatar
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    Post your ECM and TCM .ctz files, I'll have a look.

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