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  1. #1

    05 rxt poor performance

    was out on the water yesterday and didn't think it had the guts that it normally does. It also took a few more seconds of cranking to start and it always insta-starts. Barely hit 60 mph and it normally gets to 72ish... After about an hour or two of riding got it on the trailer and started it again to clear out some of the water-took three attempts, not normal.
    Doesn't have any codes or errors and besides a slight exhaust manifold leak it does not have any obvious issues... Anything I can check/do besides changing spark plugs (still last season)?
    stock, 85 hours total (12 since charger rebuild) about 20 hours on the wearing, no damage visible on it.

    thanks!


  2. #2
    boost junkie skidoochris's Avatar
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    change plugs get fresh gas report back

  3. #3
    Got Boost? psycho rxp's Avatar
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    What kind of air intake do u have ? A leaking flex joint on the J-pipe can choke out the motor & fill the hull with exhaust fumes. What was your max RPM's ?

    U could try a new set of plugs. How do the coil packs look? any cracks?

  4. #4
    Air intake is stock, doesn't that pull air from the outside (front of seat)? the hull is definitely full of fumes! when I stick my head in there with it running I forget what planet I am on.... I was planning on removing the exhaust manifold since I think its sealing to the head is compromised...

    I will change plugs and check coils and report back.

  5. #5
    Got Boost? psycho rxp's Avatar
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    Your sucking in fumes. The intake is in front of the gas tank.

    u will need to fix that first to get it to run better. Try running it with the seat off, and see if the RPM's, & performance picks up.

  6. #6
    Yeah that definitely must be fixed. Anything worth knowing about the manifold removal process? I assume once off it needs to be machined to seal well? Same goes for head mating surface.

  7. #7
    Got Boost? psycho rxp's Avatar
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    Quote Originally Posted by dcurbet View Post
    Yeah that definitely must be fixed. Anything worth knowing about the manifold removal process? I assume once off it needs to be machined to seal well? Same goes for head mating surface.
    They are a smooth machined fit from the factory with 2 dowel locating pins.
    Just pull the J-pipe & water hoses off. If the sealing surfaces are damaged / corroded replace it with a good used one from the classified section on here.

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  9. #8
    imp0ster's Avatar
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    use masking tape on the inside hull edge.

  10. #9
    Quote Originally Posted by imp0ster View Post
    use masking tape on the inside hull edge.
    not sure I understand this one?

  11. #10
    Quote Originally Posted by psycho rxp View Post
    Quote Originally Posted by dcurbet View Post
    Yeah that definitely must be fixed. Anything worth knowing about the manifold removal process? I assume once off it needs to be machined to seal well? Same goes for head mating surface.
    They are a smooth machined fit from the factory with 2 dowel locating pins.
    Just pull the J-pipe & water hoses off. If the sealing surfaces are damaged / corroded replace it with a good used one from the classified section on here.
    Replacing the j pipe Sounds like a good reason start the turbo expense now

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