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Thread: Trying to track down a little rattle

  1. #1
    Senior Member JustinD's Avatar
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    Default Trying to track down a little rattle

    Just installed a II Silver bullet 66 and an LBZ regulator, truck seems to rattle a little right before it comes into boost??? If I highlight the RPM range where I think its rattling in the log it highlights certain cells in certain tables in the tune, I Don't remember how to use this function are those the cells that are being used in this rpm range??? Also where should I look to stop the rattling?? Fuel pressure? MAF? Timing?? Im not sure where to look.
    2001 Chevrolet K2500HD Duramax
    Suncoast SCIV 1056
    Kennedy twin lift pumps
    Billet pick up
    MBRP 4" exhaust
    Air intake horn mod
    ARP head studs
    A few more go fast/truck pulling goodies!
    Tuned with EFI
    12.65 @ 107 1.71 60'

  2. #2
    Lifetime Member 06redram's Avatar
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    Are you running aftermarket injectors if so what size? Just trying to help the person out when they chime in.

  3. #3
    Senior Member JustinD's Avatar
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    No stock injectors LB7 pump with LBZ reg.
    2001 Chevrolet K2500HD Duramax
    Suncoast SCIV 1056
    Kennedy twin lift pumps
    Billet pick up
    MBRP 4" exhaust
    Air intake horn mod
    ARP head studs
    A few more go fast/truck pulling goodies!
    Tuned with EFI
    12.65 @ 107 1.71 60'

  4. #4
    Lifetime Member Dmaxink's Avatar
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    can you post the log and tell me what frame to look under? When it is rattling is it under heavy smoke? Did you modify the maf table? I'll be happy to help
    -Kory

    I'm out of ideas? Nah trick... When in doubt, 0xFFFF it out!

    http://www.PPEI.com/

  5. #5
    Senior Member JustinD's Avatar
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    It seems to rattle before it comes into boost, and at an idle it seems a little loud too, alot smoother with the LBZ reg just rattly...... If you look like say between 1700rpm and say 2200rpm thats where it really starts building boost, I can't hear it rattling there but it may be just the turbo is too loud to hear it?? If you need anymore info please message me, or if I can think of anything else I'll let you know.


    Thanks for looking
    Justin
    Attached Files Attached Files
    2001 Chevrolet K2500HD Duramax
    Suncoast SCIV 1056
    Kennedy twin lift pumps
    Billet pick up
    MBRP 4" exhaust
    Air intake horn mod
    ARP head studs
    A few more go fast/truck pulling goodies!
    Tuned with EFI
    12.65 @ 107 1.71 60'

  6. #6
    Senior Member JustinD's Avatar
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    I'd say frame 23-28 thats about where it rattles and if your going easy then you hammer it quick it will rattle until the charger lights. If I roll into it easy it doesn't make as much noise.

    Thanks again
    2001 Chevrolet K2500HD Duramax
    Suncoast SCIV 1056
    Kennedy twin lift pumps
    Billet pick up
    MBRP 4" exhaust
    Air intake horn mod
    ARP head studs
    A few more go fast/truck pulling goodies!
    Tuned with EFI
    12.65 @ 107 1.71 60'

  7. #7
    Senior Member JustinD's Avatar
    Join Date
    Jul 2009
    Posts
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    Thanks Kory!
    2001 Chevrolet K2500HD Duramax
    Suncoast SCIV 1056
    Kennedy twin lift pumps
    Billet pick up
    MBRP 4" exhaust
    Air intake horn mod
    ARP head studs
    A few more go fast/truck pulling goodies!
    Tuned with EFI
    12.65 @ 107 1.71 60'

  8. #8
    Lifetime Member Dmaxink's Avatar
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    Nov 2009
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    1,176

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    did it work for you? better? Worse? Same...i do what i can to help out!
    -Kory

    I'm out of ideas? Nah trick... When in doubt, 0xFFFF it out!

    http://www.PPEI.com/

  9. #9
    Senior Member JustinD's Avatar
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    Haven't tried it yet. I'll let you know when I do.

    Thanks again.
    2001 Chevrolet K2500HD Duramax
    Suncoast SCIV 1056
    Kennedy twin lift pumps
    Billet pick up
    MBRP 4" exhaust
    Air intake horn mod
    ARP head studs
    A few more go fast/truck pulling goodies!
    Tuned with EFI
    12.65 @ 107 1.71 60'

  10. #10
    Senior Member JustinD's Avatar
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    Jul 2009
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    Changed the fuel filter and its quiet?????????? I do have the Nicktane adapter with 2 micron CAT filter, I thought too much fuel made it rattle???? Explains why no matter what we did it rattled.
    2001 Chevrolet K2500HD Duramax
    Suncoast SCIV 1056
    Kennedy twin lift pumps
    Billet pick up
    MBRP 4" exhaust
    Air intake horn mod
    ARP head studs
    A few more go fast/truck pulling goodies!
    Tuned with EFI
    12.65 @ 107 1.71 60'

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