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Thread: 2012 2500hd with E78 like to get more torque

  1. #1
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    Default 2012 2500hd with E78 like to get more torque

    I have a 2012 6.0 2500hdwt with a E78 I thought cruise ecm) this thing is a dog towing. Is there anything I can do to give it more power ? It has a P0138 code swapped sensors didn't go away. I have all the right voltages at the plug. Dealer says probably ecm ? I'm thinking of disabling all sensor2 DTC and MIL dealer actually said good idea which shocked me.
    When it has an empty trailer on it can't out pull a cruise. Any help would be appreciated. I was searching for tunes that people tried but didn't see any and I searched here for torque or more power and didn't see anything for this truck.

  2. #2
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    Post the stock file up and a log if possible.

    Yep, E78 is the same ECM as the 1.4T in the Sonic/Cruze use. It's a TQ based ECM ala E39/E92, so opening up the TQ tables will likely help a bit (not as much as on a turbo engine though). Have you tried running premium fuel and seeing if you get any more power? If it's knocking on 87, using better gas may help.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  3. #3
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    E78keith2012st0ck.ctz
    Hopefully this works, first time.

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    Click image for larger version. 

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    Here is PID running still giving p0138 p0036

  5. #5
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    You said swapped sensors, did you replaced the one that's currently in B1S2? I'd start with that, probably less than $50 for a sensor especially the downstream ones. Both those codes are related to B1S2, heater and voltage circuits are wrong. You mentioned the wiring is correct so I'd start with a sensor.

    If that doesnt work, then look at killing the rear O2 DTCs. Just means if your cats go bad, you won't know until they're extra clogged and your mpg tanks.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  6. #6
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    I swapped b1s2 with b2s2 code stayed the same. I thought the PID's looked the same b1 to b2 it's not lighting the mil now but the code won't clear. I think I'm going to take it for a 100 mile ride if the light don't come on let it go... if it comes on disable downstreams
    '57 chevy 2drht slammed, mini tubbed 5.3 waiting twin turbos. '69 camaro pro street 383 600+ but being replaced by LS, 99 trans am. 5 Duramax trucks with EFIlive tunes

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