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Thread: Partial throttle hick up, new cam

  1. #1
    Tuner
    Join Date
    Nov 2018
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    Denver, CO
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    85

    Partial throttle hick up, new cam

    Hey everyone, I got a 06 vette ls2 with ls3 top end (milled heads) and HR273 cam. I just started tuning the partial throttle and keep getting a random and aggressive hick up for some reason. The tune has the MAF disabled so that I can work on the VE table and get that really dialed in. The hick up is bad enough where the log shows it goes from a steady 105-115 torque to -50 torque and right back up to 105 torque.

    The biggest thing i noticed was cyl airmass goes from .30 g to 0.0 g and the injector dc goes from 9.3 to 2.0. Any help would be appreciated. Thanks.

    hick up.hpl
    2nd cam 08 VE partial maf fail disable wot pe change 03.hpt

  2. #2
    Advanced Tuner
    Join Date
    Oct 2013
    Posts
    211
    Adjust your Dynamic airflow high rpm disable/re-enable to 8191/8190, if you still have the issue 0 out your prediction coefficients.

    Your VVE table is also kinda wonky, if it were my car I would use the OS tab and convert to a true Speed Density (you can still use the maf) Just keep in mind it will 0 out the VE table and you will have to start from scratch.
    Last edited by ZincGT; 04-02-2020 at 01:38 PM.

  3. #3
    Tuner
    Join Date
    Nov 2018
    Location
    Denver, CO
    Posts
    85
    I forgot about the dynamic airflow high rpm disable/re-enable, thanks. I'll try this first then move on to your other suggestions.

  4. #4
    I believe I have a similar problem. Any solutions to your issue or things that you have tried? Thanks.

  5. #5
    Tuner
    Join Date
    Nov 2018
    Location
    Denver, CO
    Posts
    85
    Sorry about the long delay, been super busy. I've changed the dynamic airflow high rpm disable/re-enable. Drive it acting a bunch more fixing the vve table then re-enabled maf. I haven't had a problem the last 2 days driving it. I'm not sure if by forgetting to do that, that it caused the problem. Maybe upload your tune.