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Would i be running lean

This is a discussion on Would i be running lean within the GTO forums, part of the Vehicle Specific category; I have a 04 gto why would my car be getting 12.9 mpg( i think i might be running lean ...

  1. #1
    Member ledesma54's Avatar
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    Red
    04 GTO

    Would i be running lean

    I have a 04 gto why would my car be getting 12.9 mpg( i think i might be running lean but wouldn't it throw a code). I have long tube headers, a diablo tune, a cold air intake, a bigger Mass air Flow, and a pair off one chamber flow-masters. What do u think. Also when i try to lanch at about 1300 rpm it kinda sputters before taking of whats up with that do i need to up my lunch point or is something wrong.

  2. #2
    Junior Member
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    Black
    2004 GTO

    It sounds rich if anything. 12.9 mpg is bad. Unless you're WOT every other run.
    You might try launching at say...3500-4k rpms.

  3. #3
    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    Often times it is bad O2 sensors making you run so rich.

  4. #4
    Member Spieldawg's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    Hmm. I had the same problem before my tune, my car was wanting 10-15 percent more fuel in the low to mid rpms. Also what headers do you have, and if they are pacesetter's did you splice and lengthen the wires or did you buy 02 extensions??
    http://www.ls1.com/forums/image.php?type=sigpic&userid=37788&dateline=120321  7751
    2004 M6 Phantom Black with Red Interior.
    13.4 @ 104 MPH 1/4 mile
    www.teamgto.org
    http://www.cardomain.com/ride/2653972
    http://www.fquick.com/spieldawg

  5. #5
    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    OK we fixed his wiring problem ( via PM's) .....He either has a bad sensor signaling for more fuel or his tunes is crap. I told him to replace the sensors and reset the ECM. IF it is still running rich it is the tune.

  6. #6
    Maggie Blown 04 GTO AUSI GTO's Avatar
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    Phantom Black Metallic
    2004 GTO Maggie Blown

    Get it on a dyno and check the a/f with a w/b and have it tuned there also.

  7. #7
    Member Spieldawg's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    I ended up soldering mine, and now they work like a champ.... I don't believe the sensors are bad.. its the crimp splices...

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