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Thread: Poor Gas Mileage after swap?

  1. #11
    Join Date
    Jun 2009
    Location
    Cocoa, FL
    Posts
    135
    those are programmers, EFI Live and HP Tuners are tuning devices. There are BIG differences between programmers and tuners.

  2. #12
    Join Date
    Aug 2005
    Location
    St. Anthony, Indiana
    Posts
    1,592

  3. #13
    Join Date
    Nov 2009
    Location
    Fort Smith, Arkansas
    Posts
    496
    Quote Originally Posted by WARLOCK View Post
    Thats terrible mileage. I get 20 to 22 in my truck. Who did your tune?
    In town?! Dam! How do i get mine to get that?!

  4. #14
    Join Date
    Dec 2007
    Location
    Wyoming
    Posts
    12
    Update. I bought a new o2 and the HPTuner software. (It hasn't arrived yet). I also disconnected my Oil Pressure Guage that was connected to the sensor on the back of the 5.3. How does this look?

    And this one.
    1969 Toyota Fj40, 2001 Chevy 5.3 Drive by Wire, NV4500. Build site at http://toysandbox.com

  5. #15
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Woohoo! Now you have it cycling! I bet it gets better mileage now.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #16
    Join Date
    Jan 2010
    Posts
    2
    Quote Originally Posted by RedHeartbeat View Post
    Woohoo! Now you have it cycling! I bet it gets better mileage now.
    i hope so! that's a pretty big difference that the trashed o2 was making the motor compensate for. congrats dude! I love when problems are properly diagnosed.

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