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Thread: LSx turbo tune problem

  1. #21
    Senior Tuner
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    Feb 2009
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    I dont have a definate answer. You did not change the PE settings as I suggested. Your ve still needed a lot of work. But in your logs from where it builds boost to not I could not see a definative issue. I am wondering if it has something to with cat lightoff on restart. Can you post your combo, including turbo/cat placement ect.

  2. #22
    Tuner turbo_denali's Avatar
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    its a 2005 LQ4 with a T4OE 87mm under mount turbo got two high flow cats and all the o sensors the cats are before the turbo and then the intercooler is before the maf the truck makes great boost once the time expires. i have been thinking about the cat light off i can see it in my EGT so it hase to be pulling timing. BTW finally see what your talking about PE was way to low ive reset it to 11.6 thanks i missed that a 100 times the on board afr was allways good BE worked but once in a while some weird lean would come in bet this fixxes it.
    2005 yukon Denali turbo,@15#s 4L80E,1978 z28 lq4,1974 corvette ls6. there is no measurment of power without load.

  3. #23
    Tuner turbo_denali's Avatar
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    here's the tune now
    2005 yukon Denali turbo,@15#s 4L80E,1978 z28 lq4,1974 corvette ls6. there is no measurment of power without load.

  4. #24
    Tuner turbo_denali's Avatar
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    Any new thought anyone
    2005 yukon Denali turbo,@15#s 4L80E,1978 z28 lq4,1974 corvette ls6. there is no measurment of power without load.