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  1. Engine Tunes/Mods
    Background leading up to the beginning of power loss/drop: I have been receiving the P0171 and P1074 codes that have been set on and then set off. The entire intake air section has been checked for leaks using water and Starting fluid, no signs in the change of engine RPMS. I have lived with...
  2. OEM Issues
    Hello all. First time poster here, located in Ontario. I am no auto mechanic, but I am somewhat familiar with electrical & mechanical. I have come seeking help on a 2007 TrailBlazer LS 4.2L 4x4. 135000km. It is showing code P0171 (Lean Bank 1). Long Term Fuel Trim running 10%-28%. Also...
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