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  1. #1

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    Sep 2012
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    Scag

    scag check engine light codes

    Hi I have a turf tiger that runs bad and smokes black. I get a check engine light but cant find anyplace that will tell me what the code means. Two long one short. Thx Scott

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  3. #2

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    Toro

    Re: scag check engine light codes

    Don't need a code to tell me that your engine is running way too rich. You don't tell us the make and model of the engine, so the first thing I would check is to see if it changes when you remove the air filter. It may be just old and clogged.

  4. #3

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    Re: scag check engine light codes

    H My tiger has a Kawasaki fuel injected FD791D Tried it w/o air cleaner ran the same, removed plugs and they were very black but not fouled

  5. #4

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    Re: scag check engine light codes

    Wet black or dry black. Dry black indicates carbon build up due to rich fuel mixture. Wet black would indicate oil mixing with the fuel.

  6. #5

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    Re: scag check engine light codes

    I would say dry black, exh pipe is also coated in dry black

  7. #6

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    Re: scag check engine light codes

    I would it is either your sensor or the electronic control unit. I am also sorry to say I don't know how to test either one.

  8. #7

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    Re: scag check engine light codes

    I FOUND A REPAIR MANUAL AND THE CODE COMES BACK TO A VACCUM PRESURE SENSOR

  9. #8

    Join Date
    Jul 2011
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    Scag Tiger Cub, Ingersoll 4018, Hustler X-ONE MoJack Pro

    Red face Re: scag check engine light codes

    Vacuum sensor and other sensors are used to vary the fuel flow to the fuel injectors either electronically or mechanically by changing the fuel pressure at the injectors. The vacuum varies as the load on the engine varies.
    Frankly I prefer carbs on small engines, less electronics to deal with, but some commercial operators are sold on EFI.
    Last edited by Mad Mackie; 09-13-2012 at 02:58 PM. Reason: more info

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