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Thread: 5.3 twin turbo

  1. #11
    Lifetime Member limited cv8r's Avatar
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    Have you tried taking fuel out of the tune and see if your injector pulse width reduces or stays the same. 2.xxx ms may just be too much fuel with 80lb injectors.
    It's all good until it goes "Bang"

  2. #12
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    Looks to be staying the same

  3. #13
    Lifetime Member limited cv8r's Avatar
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    There are a few threads with people having similar ,I think a cax was needed for a minimum pulse width table.
    It's all good until it goes "Bang"

  4. #14
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    Would reducing b4005 shorten injector pulse with at idle and cruise

  5. #15
    Lifetime Member limited cv8r's Avatar
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    You can try,but I believe without the missing min injector pulse width table if it is in your tune,you will never get below this value. Try doing a search on B9021.
    It's all good until it goes "Bang"

  6. #16
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    Says not found it has a min injector pulse width its all set at 1.00533

  7. #17
    Lifetime Member limited cv8r's Avatar
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    I meant search the forum
    It's all good until it goes "Bang"

  8. #18
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    how can I add that t0 my os 0407303

  9. #19
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by danny68ss View Post
    its a 5.3 with two t3/t4`s 80lb injectors cos3 it runs rich when idling but when it gets into boost around 3600 it starts leaning out gauge shows 16.1 any help would be greatly appreciated here's the tune and a data log
    Quote Originally Posted by danny68ss View Post
    datalog
    Looking at your log, MAP does not exceed 103 kPa... (so either you have no boost or you have the wrong MAP sensor)

    this means that your operating point is staying on the Main VE table and not going into the Boost VE table.

  10. #20
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by danny68ss View Post
    how can I add that t0 my os 0407303
    What was the OEM OS id for this COS...?

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