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Truck running rich

Discussion in 'Technical Chat' started by Combatman, May 2, 2015.

  1. May 2, 2015 at 8:33 AM
    #1
    Combatman

    #1
    Combatman [OP] Well-Known Member

    Joined:
    Apr 9, 2014
    Member:
    #127331
    Messages:
    242
    Gender:
    Male
    Sioux Falls sd
    Vehicle:
    1996 Tacoma 4x4 3.4 Manual
    31" Wrangler tires
    Hey guys! I have a 1996 tacoma 3.4l and I've been noticing a lack of power recently and haven't been getting very good MPG. But I have no check engine light.

    So I hooked it up to a scan tool and my long term fuel trim is -15 at idle and it gets a little better as I give it some throttle.

    I replaced the Air/Fuel o2 sensor and there was no change. And the lbs/min on the MAF read via a scantool looked almost perfect.

    I'm just wondering if anyone on here could try and help me diagnose this issue? I'm starting to run out of ideas myself.
     
    Combatman, May 2, 2015
    #1

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