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2003 Sportster 4TEC

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  • 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
    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.

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    • #3
      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

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      • #4
        Re: 2003 Sportster 4TEC

        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.

        Comment


        • #5
          Re: 2003 Sportster 4TEC

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

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          • #6
            Re: 2003 Sportster 4TEC

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