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Thread: Running Lean on Spray.

  1. #1
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    Running Lean on Spray.

    On the 75 and 100 seems to run lean like mid 12s afr. we jet up the fuel jet to like a .031 and tthat helps a bit but still.

    changing the fuel filter and what not to see if we can fix it.

    btw i have a hsw plate with a nx wet kit..

    thanks guys.

  2. #2
    gettin' screwed...
    BigKID's Avatar

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    Are you loging fuel pressure as well? What pump, injectors and mods? If upping the fuel jet makes minimal to no changes, it is likely you are running out of pump.
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  3. #3
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    ya i got the 02 injectors 28.8 lbs or w/e and stock pump but im still runnin lean. on the 75 and 100 sooo shouldnt the stock pump handle that lil amoutn?

  4. #4
    LSWHAT???? jmill96Z's Avatar

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    Try lowering the bottle pressure down to 900. That should richen it up a little.

  5. #5
    Bone Stock..True Story.
    TheBiz's Avatar

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    I would tend to think that you are running out of pump. Sure a stock pump and the 28.8 injectors "should" handle a small shot, but that doesn't mean one or both aren't weak.

    Lower your bottle pressure and see if that fattens it up a little. If it doesn't help, I would look into changing the pump. May want to hook up the PCM and see what the duty cycle is on the injectors.

  6. #6
    DIG DIG DIG Mycol's Avatar

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    pump....change it. it sucks.....

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