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Thread: Whats the fastest way to keep engine reduce away with boost??

  1. #1
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    Whats the fastest way to keep engine reduce away with boost??

    I raise the boost and around 5,500 rpm it hits and goes into engine reduce power. Its been awhile I tune a boosted vehicle its my personal truck 2006 with 16 lbs with 160 lb injectors. I think I remember doing one few years back that I had to half the stoich and VE table?? Well this one its on straight e85 what should I do, the same?

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    Found a thread where it says to multiply both IFR and VE by .5 and leave stoich alone. Will this work I'm on e85 that's why I just want to make sure.

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    You need to know what is causing the REP.. You should have a diagnostics code the pops up when it goes into REP. To properly fix this you need to know what code you're setting so you know what to do.
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    I saw it and I'm pretty sure it was 1514, let me double check.
    Well it was not making it on low boost.

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    Sounds like you're hitting a max calculated airmass limiter. Look under engine diag.
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  6. #6
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    I got Calculate map max, delta airflow, MAF cylair MAx, raised and Error max map at 100 error min map at 0.

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    What is your airflow at? Gen3 stuff has a hardcoded airflow limit. If you're hitting that, then you need to scale the airflow. I don't recall what it is off the top of my head.. I would review the log and see if you're hitting the REP in the same spot airflow wise.

    Edit: 512 g/s dynamic airflow limit
    Last edited by charcoal03silvy; 10-09-2018 at 02:39 PM.
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  8. #8
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    I have the code, its P0068.

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    Quote Originally Posted by =fast= View Post
    I have the code, its P0068.
    If all of those limit tables are maxed then you may need to end up scaling your airflow in the file.
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  10. #10
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    Will the VE and IFR work well to half it at .5?

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    I would try to leave as much resolution as possible in the end, but 50% will be quick and easy. Remember you also need to scale the timing table now that your reported airflow is halved. If you have an auto trans, then you need to either adjust trans tables or use the torque tools to keep the trans happy, ie telling it the correct amount of torque being delivery.
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  12. #12
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    It work I haven’t got no REP.

  13. #13
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    Quote Originally Posted by =fast= View Post
    It work I haven’t got no REP.
    excellent!
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