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Thread: Help! Won't stay idled

  1. #1
    Tuner in Training
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    Help! Won't stay idled

    The truck will not stay idle until it warms up. It will bust off but will die if you dont keep your foot on the throttle. I attached a scan of this happening. Even if the truck is warm it still doesnt idle well.

    Here is a quick run down of setup

    385ci
    225 CNC AFRs
    twin 6766s
    base fuel press 43psi
    ID2000s
    four charge pipe with slot MAF
    scaled 75% to get injectors in
    E67

    Im trying to get this thing to start and idle before I switch over to e85. I attached the current tune and also a stock on for comparision (1207020707).

    Can someone help me?
    2008 Twin turbo TBSS, Precision 6766, 385 LS2, ID2000s

  2. #2
    Potential Tuner
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    Much more info needed. What is your HP goal with this set-up?
    Scaling looks wacky to me. Idle fuel is all messed up looking commanded and wideband numbers.

  3. #3
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    Quote Originally Posted by Boost6924 View Post
    Much more info needed. What is your HP goal with this set-up?
    Scaling looks wacky to me. Idle fuel is all messed up looking commanded and wideband numbers.
    1000HP on e85. Wideband show fuel cut when it wants to die on cold starts.
    2008 Twin turbo TBSS, Precision 6766, 385 LS2, ID2000s

  4. #4
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    Quote Originally Posted by Boost6924 View Post
    Much more info needed. What is your HP goal with this set-up?
    Scaling looks wacky to me. Idle fuel is all messed up looking commanded and wideband numbers.
    What other info do you need?
    2008 Twin turbo TBSS, Precision 6766, 385 LS2, ID2000s

  5. #5
    Advanced Tuner
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    OK, scaled down 75% might too much of a scale on the tune..

    easiest thing to do load up a stock tune, put the stock injectors back in it, and run it 4bar not referenced. get it to run and tune it for startup and idle.

    then try scaling 50%, but then cut the ifr down in half again and double the stoich. do all this with the stock injectors, once its still running good. put the ID2000's back in it.

    a 50% tune should support over 1k hp.

    -Carl

  6. #6
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    Quote Originally Posted by carlrx7 View Post
    OK, scaled down 75% might too much of a scale on the tune..

    easiest thing to do load up a stock tune, put the stock injectors back in it, and run it 4bar not referenced. get it to run and tune it for startup and idle.

    then try scaling 50%, but then cut the ifr down in half again and double the stoich. do all this with the stock injectors, once its still running good. put the ID2000's back in it.

    a 50% tune should support over 1k hp.

    -Carl
    how do you get ID2000s injectors to fit with a 50% scaling?
    2008 Twin turbo TBSS, Precision 6766, 385 LS2, ID2000s

  7. #7
    Senior Tuner mowton's Avatar
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    Quote Originally Posted by jpracing01 View Post
    how do you get ID2000s injectors to fit with a 50% scaling?
    The IFR/Stoich trick gives you another 50% without effecting the other tables resolution like the timing and airflow.

    Ed M
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  8. #8
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    Quote Originally Posted by mowton View Post
    The IFR/Stoich trick gives you another 50% without effecting the other tables resolution like the timing and airflow.

    Ed M
    Thanks I will have to try that. I didnt think about doing that.
    2008 Twin turbo TBSS, Precision 6766, 385 LS2, ID2000s

  9. #9
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    Im one a 50% scaled tune and half IFR/stoich trick. I cant get this thing to lean up at idle.
    2008 Twin turbo TBSS, Precision 6766, 385 LS2, ID2000s

  10. #10
    Advanced Tuner
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    post stock tune.

    can you reduce the short pulse limit to 3.0?

    -Carl

  11. #11
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    Quote Originally Posted by carlrx7 View Post
    post stock tune.

    can you reduce the short pulse limit to 3.0?

    -Carl
    2008 Twin turbo TBSS, Precision 6766, 385 LS2, ID2000s