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Thread: 02 Silverado Tune Help

  1. #21
    Lifetime Member EagleMark's Avatar
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    I know that's a popular belief but the post cat O2 sensors can effect fueling by 10% found in 98-00 Vortec disassembly. Haven't found it yet in LS stuff.. but in a 0411 PCM vehicle I did have one bad cat that threw off same bank fueling and when the post cat O2 were disabled it went away. So I'm guessing the same scenario. The bank with faulty cat post O2 sensor voltage was swinging like a pre cat O2.

    You do need to physically disconnect post cat to disable them. Turning off DTC does not disable them. I usually fix them discretely and leave them all plugged in.

    I didn't study your data log hard but looked like the big fueling issues were at idle and low RPM. I'd be very curious if you still had post cat O2 hooked up during that log and seeing another log with them disconnected with no other changes!

  2. #22
    Member ippielb's Avatar
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    I will most definitely go through all the tutorials again, it's been a while since i played with my gas tuning. Got a duramax and been focusing on it lately.

    I did not disconnect the post cats 02 sensors in that log, i will keep the same tune on and then unplug them and do another log to see if any changes are made to my fueling.

    I agree that fueling issues are at idle and low rpm, you can tell just by sitting in the truck.


    Edit:

    Looking at the spark for stock vs my tune for low octane, i kept it pretty conservative, but i am going to set the low octane spark table back to stock and see if that changes anything.
    Last edited by ippielb; June 6th, 2013 at 04:45 AM.
    2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax
    NADP Race Transmission & NAPC Built Transfer Case
    AFE Stg 2 Intake Snow Performance Methanol Injection
    FASS 150gph Titanium Series Pump EFI Live
    PPE Race Valve & PPE Fuel Rail Fitting
    BD Manifold 3" AFE Ceramic Downpipe 4" Straight Pipe
    Yukon Grizzly Locker Mag-Hytec Cover & Traction Bars
    Leveling kit & 33" Hankook RT03 18" XD Addict Rims
    HID's all around LED taillights and 3rd brake light
    Autometer Fuel Pressure, Boost, and Pyro Gauges

  3. #23
    Lifetime Member Gregs's Avatar
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    Quote Originally Posted by ippielb View Post
    I agree that fueling issues are at idle and low rpm, you can tell just by sitting in the truck.

    Looking at the spark for stock vs my tune for low octane, i kept it pretty conservative, but i am going to set the low octane spark table back to stock and see if that changes anything.

    yeah its a good idea to keep the low octane stock. Generally you could put in a conservative 3-4* increase across the board on the high octane table without any issues.

    first thing i would do if i were you is fix your pe settings then get the maf tuned then you can work on the ve table. keep an eye on your spark advance because in the last log something was taking huge bites out of it. if you log spark EST perimeters it will tell you whats taking the advance out. my guess is either ac spark reduction or torque management. BTW you will probably like the truck a lot more when you reduce/eliminate TM

    03 Silverado 5.3 ECSB 4x4 Z71
    Comp Cam 206/212 .515/.522 112 lSA, hardened rods with LS9 springs

    2010 Tahoe VVT AFM 5.3
    Stock for now

  4. #24
    Member ippielb's Avatar
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    Quote Originally Posted by Gregs View Post
    yeah its a good idea to keep the low octane stock. Generally you could put in a conservative 3-4* increase across the board on the high octane table without any issues.

    first thing i would do if i were you is fix your pe settings then get the maf tuned then you can work on the ve table. keep an eye on your spark advance because in the last log something was taking huge bites out of it. if you log spark EST perimeters it will tell you whats taking the advance out. my guess is either ac spark reduction or torque management. BTW you will probably like the truck a lot more when you reduce/eliminate TM
    Set my low octane spark table to stock. Left my high octane table alone, except for smoothing a few rough spots out.

    I will change the PE settings, and start tuning my MAF.

    I believe the spark advance is being effected by my A/C, for some reason my AC clutch keeps engaging and disengaging randomly without anything changing.

    I have removed 80% of torque management as well.
    2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax
    NADP Race Transmission & NAPC Built Transfer Case
    AFE Stg 2 Intake Snow Performance Methanol Injection
    FASS 150gph Titanium Series Pump EFI Live
    PPE Race Valve & PPE Fuel Rail Fitting
    BD Manifold 3" AFE Ceramic Downpipe 4" Straight Pipe
    Yukon Grizzly Locker Mag-Hytec Cover & Traction Bars
    Leveling kit & 33" Hankook RT03 18" XD Addict Rims
    HID's all around LED taillights and 3rd brake light
    Autometer Fuel Pressure, Boost, and Pyro Gauges

  5. #25
    Member ippielb's Avatar
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    I updated the firmware and software and it says $050B code is coming up when i try to plug the controller into the truck and do a tune.
    2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax
    NADP Race Transmission & NAPC Built Transfer Case
    AFE Stg 2 Intake Snow Performance Methanol Injection
    FASS 150gph Titanium Series Pump EFI Live
    PPE Race Valve & PPE Fuel Rail Fitting
    BD Manifold 3" AFE Ceramic Downpipe 4" Straight Pipe
    Yukon Grizzly Locker Mag-Hytec Cover & Traction Bars
    Leveling kit & 33" Hankook RT03 18" XD Addict Rims
    HID's all around LED taillights and 3rd brake light
    Autometer Fuel Pressure, Boost, and Pyro Gauges

  6. #26
    Joe (Moderator) joecar's Avatar
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    Did you update the BBx config files... (Program All)...?

  7. #27
    Member ippielb's Avatar
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    Got it working, tried to unplug the rear o2 sensors and made an idle log.
    silverado no rear o2 sensors idle.efi

    Then i put on this tune.
    02 Silverado 8 june.ctz

    And did a log with that tune for doing VET and MAF
    silverado 5.3l log.efi

    Now i'm going to finish using the log to try and tune a little bit more.

    Just cant get this to work right. MAF calibrating is confusing me. The values aren't the same. Cant figure it out.
    Click image for larger version. 

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    Last edited by ippielb; June 8th, 2013 at 01:49 PM.
    2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax
    NADP Race Transmission & NAPC Built Transfer Case
    AFE Stg 2 Intake Snow Performance Methanol Injection
    FASS 150gph Titanium Series Pump EFI Live
    PPE Race Valve & PPE Fuel Rail Fitting
    BD Manifold 3" AFE Ceramic Downpipe 4" Straight Pipe
    Yukon Grizzly Locker Mag-Hytec Cover & Traction Bars
    Leveling kit & 33" Hankook RT03 18" XD Addict Rims
    HID's all around LED taillights and 3rd brake light
    Autometer Fuel Pressure, Boost, and Pyro Gauges

  8. #28
    Member ippielb's Avatar
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    Click image for larger version. 

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    Is this acceptable for a VE Table? Or should i smooth it all out?
    2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax
    NADP Race Transmission & NAPC Built Transfer Case
    AFE Stg 2 Intake Snow Performance Methanol Injection
    FASS 150gph Titanium Series Pump EFI Live
    PPE Race Valve & PPE Fuel Rail Fitting
    BD Manifold 3" AFE Ceramic Downpipe 4" Straight Pipe
    Yukon Grizzly Locker Mag-Hytec Cover & Traction Bars
    Leveling kit & 33" Hankook RT03 18" XD Addict Rims
    HID's all around LED taillights and 3rd brake light
    Autometer Fuel Pressure, Boost, and Pyro Gauges

  9. #29
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by ippielb View Post
    Got it working, tried to unplug the rear o2 sensors and made an idle log.
    silverado no rear o2 sensors idle.efi

    Then i put on this tune.
    02 Silverado 8 june.ctz

    And did a log with that tune for doing VET and MAF
    silverado 5.3l log.efi

    Now i'm going to finish using the log to try and tune a little bit more.

    Just cant get this to work right. MAF calibrating is confusing me. The values aren't the same. Cant figure it out.
    Click image for larger version. 

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    The first pic you showed is the correction multiplier map (with low cell count filter and transient filter applied).

    The second pic is your MAF table, you do paste-multiply-with-labels into this.

    Remember that LTFTBEN is only good during CL... outside of CL you have to use WO2BEN.

  10. #30
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by ippielb View Post
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    Is this acceptable for a VE Table? Or should i smooth it all out?
    I would leave it as is...

    I would also look at the cells not hit, and compare them to the general shape of the developing VE and do some manual extrapolation.


    How did you arrive at this VE table...?

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