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Thread: engine knock

  1. #1
    Join Date
    Jul 2005
    Location
    MN
    Posts
    3

    Default engine knock

    I recently installed Edge Juice w/attitude on my 04.5 LLY, no other mods yet. Driving when engine is cold/cool I get a knocking under a load (going uphill) then disappears. Doesn't do it when it reaches operating temps. Happens on level 1 & 3. I'm pretty cautious about warming up engine before putting a load on it.
    Thanks for your help.
    Jeff

  2. #2

    Default

    I have never run the Edge, but two or three other programmers and tunes. Have experienced noises I don't like when on higher levels in the winter, or when warming up and under load. More fuel + more advance = more diesel noise. I started all three of my trucks this morning at about 27 degrees, and noticed how much noiser they all were - two of the three bone stock factory programming.

    Personally, I'd leave it off or on the lowest level possible until you are a full operating temps. You might also experience the same thing when outside air temps get really cold as well, even when the engine is warm.

    These engines are plenty sturdy - don't panic. Its the knocks that never go away you have to worry about...
    2011 Chevrolet Tahoe 5.3L daily driver
    • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
    • Total GM diesel miles to date : ~950K

  3. #3
    Join Date
    Jul 2005
    Location
    MN
    Posts
    3

    Default

    Thanks Mark. I have never heard noise when up to temp, so I hoped it was minor.

    Jeff

  4. #4
    Join Date
    Nov 2000
    Location
    foxboro,ma.
    Posts
    908

    Default

    I know older edge stuff didnt make any more power untill it reached 180*, poss what your hearing is the added fuel timeing. Have you added a good dose of injector cleaner lately ? its not a bad idea .
    93 c-2500 6.5td,96 6.5td x cab,01 GMC lb7 Xcab ,2004 lly crew cab ,2006 lbz crew cab,honda CBR1100xx,2003 polaris prox 700 , 2001 31' holiday rambler 10K lbs house on wheels!

  5. #5
    Join Date
    Jul 2005
    Location
    MN
    Posts
    3

    Default

    I run Stanadyne Performance in every tank. I have version 1.2 Edge also.
    Thanks again for the help.
    Jeff

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