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Why am I running rich?

This is a discussion on Why am I running rich? within the General Help forums, part of the LSx Technical Help Section category; Below is a list of my mods when i hook up a handheld for my "SES" light it says i ...

  1. #1
    Senior Member clg82's Avatar
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    Why am I running rich?

    Below is a list of my mods when i hook up a handheld for my "SES" light it says i am running rich.........WHY?
    2000 Arctic White trans am, ws6 hood, ws6 air box, slp lid, slp smooth bellows, slp loudmouth exhaust,shift kit, rebuilt trans, LS6 intake, 3.73 gears, Shaner S3 p/p throttle body, and a tune . SFC. C6 ZO6 rims 18" in back 17" in front. Drilled and slotted rotors.

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    Slow'er'Ass Mr. Luos's Avatar
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    @ handheld.

    Get a wideband on it if you are that worried about it.



    Anytime you allow air to come in and get out faster and at higher volumes, the stock tune will start to go rich.

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    Senior Member clg82's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    @ handheld.

    Get a wideband on it if you are that worried about it.



    Anytime you allow air to come in and get out faster and at higher volumes, the stock tune will start to go rich.
    I'm not that worried about it I was just curious as to what affects the air fuel ratio......anyone else with an idea

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    Member ls1speedster's Avatar
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    would your MAF throw anything off.. alot of ppl say that it is worthless and dont need it.. its good for milage.. i looked at the mods... u might throw off ur air/fuel ratio... idk

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    Member ls1speedster's Avatar
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    also have u ever had o2 sensor problems.. every bird does its a matter of time

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    Senior Member clg82's Avatar
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    already had my o2 censors replaced

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    Slow'er'Ass Mr. Luos's Avatar
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    More air coming out of the motor faster will register more air at the O2's...and the computer will make up for it with more fuel.

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    Senior Member clg82's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    More air coming out of the motor faster will register more air at the O2's...and the computer will make up for it with more fuel.
    Frost the tuning expert on here has said that he doesn't think that the new intake would cause that......................

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    Slow'er'Ass Mr. Luos's Avatar
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    MAP sensor and MAF sensor will both read more air coming in...and assume it needs a bit more fuel.

    This is why MOST of the bolt-ons cause our cars to go rich.
    The factory is already a bit fat.

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    Senior Member clg82's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    MAP sensor and MAF sensor will both read more air coming in...and assume it needs a bit more fuel.

    This is why MOST of the bolt-ons cause our cars to go rich.
    The factory is already a bit fat.
    that is what i figured, is it bad to run our cars rich?

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    Slow'er'Ass Mr. Luos's Avatar
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    Rich won't hurt anything. Other than a little bit of power.
    You need to get a wideband on it to see how bad it really is.

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    Senior Member clg82's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Rich won't hurt anything. Other than a little bit of power.
    You need to get a wideband on it to see how bad it really is.
    Well i plan on sending my puter in to get tuned with frost but he says that i should take care of the running rich problem first............hmmmm confusing..........

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    JMAC Racing WS6ICK's Avatar
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    Sending your PCM in to get tuned???? Hmmmmmmm, there something about tuning a car without the car is what worries me.
    2010 Camaro
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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by WS6ICK View Post
    Sending your PCM in to get tuned???? Hmmmmmmm, there something about tuning a car without the car is what worries me.
    Mail order tunes aren't bad for most bolt-on cars.
    Hard to do it here at our altitude though.
    Lots of shops have set tunes for their cams as well.

    I would obviously prefer a full dyno tune though.

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    TunedbyFrost.com Tuner Frost's Avatar
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    Quote Originally Posted by clg82 View Post
    Frost the tuning expert on here has said that he doesn't think that the new intake would cause that......................

    No, I said it wouldn't have enough of an impact to set a code. This entire thread is speculation without knowing what DTC was set as I told you via email.



    Quote Originally Posted by WS6ICK View Post
    Sending your PCM in to get tuned???? Hmmmmmmm, there something about tuning a car without the car is what worries me.

    Bolt ons cars with a stock MAFs? No worries

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    TunedbyFrost.com Tuner Frost's Avatar
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    Just scan and tell us what the DTC is, as I mentioned last week.

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    Senior Member clg82's Avatar
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    ^^^will do i am going to go to kragen right after work and then i will post up the codes.
    Last edited by clg82; 07-21-2008 at 02:15 PM.

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    TunedbyFrost.com Tuner Frost's Avatar
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    I don't know what kragen is, but if you picked up the code with the handheld before, why not use it again?

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    Senior Member clg82's Avatar
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    Ok here is officially the codes: P0155- o2 heater circuit, bank2 sensor 1 and the second code is P0401- exhaust gas recirculation flow insufficient detected what exactly do these mean?

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    Slow'er'Ass Mr. Luos's Avatar
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    It appears the O2 is creating the rich condition.

    What O2's did you replace? Which ones did you put in?
    The passenger side O2 appears to be having a problem.

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