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Runs lean only on full boost

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    #1

    Runs lean only on full boost

    I just started noticing that my car runs lean everytime i hit the throttle and get into boost. but when im just crusing the wideband is showing around 13-17. when i hit the throttle it gets down to 10. im worried about the block. any info?
    miss my turbo cb7
    moved onto volvos. dont know how that happened, just did
    Tags: None
    #2
    um...tune it? just an idea.

    From the way you posted it looks like you are mixing up rich and lean.

    lean = higher number
    rich = lower number
    "Auto racing, bull fighting and mountain climbing are the only real sports....all others are games."
    - Ernest Hemingway

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      #3
      ^^^^^^^^^^^^^^^^^
      what he said map may not be tuned that high with boost tables
      Dont drive faster than your gaurdian angel can fly

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        #4
        Originally posted by quickangel93 View Post
        I just started noticing that my car runs lean everytime i hit the throttle and get into boost. but when im just crusing the wideband is showing around 13-17. when i hit the throttle it gets down to 10. im worried about the block. any info?
        That is a good afr for cruising and idle, 14.7 or so is ideal.
        A lower number means a you are going rich, but under boost, you dont really want to see an afr over 12.5 most of the time, and generally speaking. There are times when people run beyond this, but under boost, it becomes somewhat risky.
        Remember, it is Air to Fuel Ration, so a lower number means you have less air than fuel and a higher number means you have more air than fuel.
        Also, each type of fuel, gasoline, methanol, etc, has a different stoichiometric reading, so when you switch fuel types, these numbers change.
        But that is a whole 'nother lesson kiddos.
        F it, here is a free lesson from your good friends at wikipedia.

        Fuel
        Gasoline 14.7 : 1
        Natural Gas 17.2 : 1
        Propane (LP) 15.5 : 1
        Ethanol 9 : 1
        Methanol 6.4 : 1
        Hydrogen 34 : 1
        Diesel 14.6 : 1
        2010 Taurus SHO - Livernois Goodies
        2002 BMW 330 CI Convertible - HUNK OF JUNK

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          #5
          ohh i thought running in the low 10s is bad. im constantly running 93. i might need to get a retune. i waiting for the first week of august so i have some vaca and take it down again.
          miss my turbo cb7
          moved onto volvos. dont know how that happened, just did

          Comment

            #6
            Id' say youre running a little rich, get retuned and aim for 12-12.5 afr.
            Be careful with how much timing youre running under full boost as well. Too much will kill your setup.
            2010 Taurus SHO - Livernois Goodies
            2002 BMW 330 CI Convertible - HUNK OF JUNK

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              #7
              thanx for yalls info on this i might need this for the future

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