SBT Jetski Engines, Parts & Accessories

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  1. #1
    Joined
    Apr 2015
    From
    nj
    Posts
    5

    Default 2003 Sportster 4TEC

    Hi, I have the above mentioned 2003 Sportster 4TEC which was no end of frustration last summer. When we stored it for the winter after summer 2013, she was running great. We ran the gas tank dry, made sure it had antifreeze and put it on the trailer as we do every year. Last spring we filled it with gas checked the oil and coolant and dropped it in the lake. She ran like crap. No bottom end, no top end, stumbled just awful. We added fuel additives, but no change. We pulled the boat, checked the fuel filter, clean. Checked the fuel pressure, dead on, checked the coil packs, all good, pulled each injector, pretty patterns and changed the spark plugs. We even did a compression test on each cylinder and while one was alittle soft it was not out of range. I am pretty sure the engine is running rich, it burned a lot of fuel, and smelled "sweet". Myself and my mechanic can not find a way to lean it out, if that is the problem. Do the injectors need replacement? I know it is not going to run nice this year with out help. Please help! Thank you,
    Howard

  2. #2
    Joined
    Mar 2003
    From
    SBT
    Posts
    21,545

    Default Re: 2003 Sportster 4TEC

    This does sound like a fuel issue.
    I would have the fuel injectors cleaned and check again.
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

  3. #3
    Joined
    Apr 2015
    From
    nj
    Posts
    5

    Default Re: 2003 Sportster 4TEC

    Since the injectors are spraying a nice clean pattern, we are now leaning toward a bad temperature sensor. We think it might be "stuck" reading cold and therefore sending a rich mixture. I will let you know how it goes. Thank you, Howard

  4. #4
    Joined
    Mar 2003
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    SBT
    Posts
    21,545

    Default Re: 2003 Sportster 4TEC

    Quote Originally Posted by hontell View Post
    Hi, I have the above mentioned 2003 Sportster 4TEC which was no end of frustration last summer. When we stored it for the winter after summer 2013, she was running great. We ran the gas tank dry, made sure it had antifreeze and put it on the trailer as we do every year. Last spring we filled it with gas checked the oil and coolant and dropped it in the lake. She ran like crap. No bottom end, no top end, stumbled just awful. We added fuel additives, but no change. We pulled the boat, checked the fuel filter, clean. Checked the fuel pressure, dead on, checked the coil packs, all good, pulled each injector, pretty patterns and changed the spark plugs. We even did a compression test on each cylinder and while one was alittle soft it was not out of range. I am pretty sure the engine is running rich, it burned a lot of fuel, and smelled "sweet". Myself and my mechanic can not find a way to lean it out, if that is the problem. Do the injectors need replacement? I know it is not going to run nice this year with out help. Please help! Thank you,
    Howard
    have you checked for any fault codes?
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

  5. #5
    Joined
    Apr 2015
    From
    nj
    Posts
    5

    Default Re: 2003 Sportster 4TEC

    unfortunately, we do not have a code reader and they are quite expensive for one boat.
    H

  6. #6
    Joined
    Jul 2020
    From
    Mexico
    Posts
    4

    Default Re: 2003 Sportster 4TEC

    Стань королем настоящего средневекового королевства!
    Захватывающая RPG игра и симулятор замка
    https://fas.st/tdhru

  7. #7
    Joined
    Jul 2020
    From
    Mexico
    Posts
    4

    Default Bathroom Organization

    Music has tied us Keyboards & Pianos https://fas.st/NNXXI Drums & Percussion https://fas.st/Vay4s String Instruments https://fas.st/32jbD

  8. #8
    Joined
    Sep 2020
    From
    Iraq
    Posts
    3

    Default Shoe Storage

    This is a unique place for fashionable women's clothing and accessories. We offer our clients women's clothing, jewelry, cosmetics and health products, shoes, bags and much more. https://fas.st/Ujfha

  9. #9
    Joined
    Sep 2020
    From
    Iraq
    Posts
    3

    Default Shoe Storage

    This is a unique place for fashionable women's clothing and accessories. We offer our clients women's clothing, jewelry, cosmetics and health products, shoes, bags and much more. https://fas.st/Ujfha

  10. #10
    Joined
    Sep 2020
    From
    Iraq
    Posts
    3

    Default Shoe Storage

    This is a unique place for fashionable women's clothing and accessories. We offer our clients women's clothing, jewelry, cosmetics and health products, shoes, bags and much more. https://fas.st/Ujfha

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