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05 seadoo rxp lack of power
- Thread starter LEXUSRY
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BMANN06
Well-Known Member
What RPMs are you turning? Go over all supercharger intake hoses and MAKE SURE that hose clamps are tight. Obviously something was missed on the installation of the supercharger (ie hose not tight etc) or the new/rebuilt supercharger wasn't rebuilt to spec. Start with the intake hoses double then triple check the hose clamps. If all is okay there, pull the intake hose off the supercharger. Get a 17mm Long socket and a good torque wrench (inch/lbs), set the wrench to about 55 inch/lbs and see the the nut on the supercharger impeller slips.
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Other than the hesitation is sounds like you are using a slow speed key.
BMANN06
Well-Known Member
Interesting, either both your keys are programmed as learner keys or you have some codes that need to be read. If I had to take a guess at the code it would be the "High Oil Pressure Condition" or the oil pressure switch on the front of the block.
As this code puts the ski in "high limp mode" where you can't rev past 5K rpms (+/- 100 RPM).
When you put your yellow key on does the LCD indicate Learner?
Or Is your check engine light on?
It does sound like a limp mode kind of issue...
I read a post here that the rectifier will casue a limp mode type of running.
I think (and I will do a search to make sure), that you simply unplug it and if the ski runs well, the rectifier is the issue...
I read a post here that the rectifier will casue a limp mode type of running.
I think (and I will do a search to make sure), that you simply unplug it and if the ski runs well, the rectifier is the issue...
Here is the post about the rectifier, it is about 2/3 down the posts...
Same issues as your ski for the most part...
http://www.seadooforum.com/showthre...-mode-The-Service-center-says-it-doenst-exist
Same issues as your ski for the most part...
http://www.seadooforum.com/showthre...-mode-The-Service-center-says-it-doenst-exist
Michael211_2000
Well-Known Member
When were the spark plugs last changed? Just because they look to be in good condition does not mean they are sparking correctly under pressure (had this problem myself, had to limp back to the boat ramp after my spark plugs failed). Further even if they spark while grounded lying atop the engine in their coils (I tried this myself!), they still can fail to spark under compression in the cylinders (my experience again... 3 new spark plugs cured all my ills). So if they haven't been replaced since this problem started I strongly suggest getting a brand new set of spark plugs and install them. Spark plugs should be replaced annually when the oil change is performed.
ps. You did type "new supercharger install before problem occur." Just saying, we read what you type. GIGO. Is this problem the reason you had a new supercharger installed then? Was there anything actually wrong with the previous supercharger that you had replaced with this new one?
pps. Under Watercrafts you have listed an RXT, but your thread is regarding an RXP (you might consider updating your Watercraft in your profile). How many hours are on this particular SeaDoo?
- Michael
Michael211_2000
Well-Known Member
fyi Bmann, many people will continue to run their supercharged SeaDoo's with failed superchargers and not even realize it as long as nothing breaks inside the engine (ie. no parts from the supercharger fall down into the timing chain or PTO gears)... without a working supercharger, it's just like a 155hp non-supercharged SeaDoo all you lose is some rpm's and about 10 mph on the top end it's still intercooled just no longer supercharged. I've run mine with the throttle body air hose off before and it still ran and accelerated just fine just not like a rocket-ship anymore but still quite fun (I knew when the hose popped off, I saw the rpm's drop instantly even though I hadn't let off the throttle any... it was inconvienent right then to put it on the trailer and put that hose back on so I just kept going for another hour without the supercharger providing any boost pressure to the engine).
Just saying... max 35 mph isn't a supercharger problem there's something else going on here without a working supercharger it should still go well over 50 mph.
- Michael
BMANN06
Well-Known Member
Thanks for the lesson Michael, FYI speedometers on seadoos are not accurate and do not provide any useful means for troubleshooting. This is why I specifically asked OP what rpm he was turning. When a blown ski is running 5000-6000 rpm at wot this could be a supercharger boost problem ... just sayin.
To the OP if your not seeing any check engine lights. I would start with throttle cable, ensure your cable is getting all the way open when at wot. Check at throttle body if theres slack you can tighten it up but i always suggest a throttle position sensor reset. If you have access to budds/candoo just see what throttle position sensor is showing when your at wide open throttle.
To the OP if your not seeing any check engine lights. I would start with throttle cable, ensure your cable is getting all the way open when at wot. Check at throttle body if theres slack you can tighten it up but i always suggest a throttle position sensor reset. If you have access to budds/candoo just see what throttle position sensor is showing when your at wide open throttle.
Michael211_2000
Well-Known Member
Bmann, I was not meaning to "lecture" or anything... was just saying. With my throttle body air hose popped loose from the throttle body I was easily able to get up into the mid-40's to low-50's (it was a problem there for awhile, my hose kept popping off no matter how tight I tightened the clamp.... took Formula 409 and cleaned the inside of the hose and outside rim of the throttle body really good, and it's never come off again; Yay!).
At any rate, I'm pretty sure the supercharger can be eliminated as a part of the problem the OP is experiencing (though I'd still like to know if there was any actual failure in his previous supercharger... why not just have it rebuilt instead of buying a brand new one?).
Failed spark plugs on the other hand can make an engine run like cwap (he mentioned hesitation when applying throttle and then barely getting over ~5K rpm's) and they don't trigger any check engine light warning I've found. I could not tell a failed spark plug from a brand new spark plug just looking at them visually so how does the OP know his spark plugs are all "sparking" correctly under compression? It's only a couple bucks a plug and some 20 minutes to change them out... worth a shot, IMHO.
Regards!
- Michael
At any rate, I'm pretty sure the supercharger can be eliminated as a part of the problem the OP is experiencing (though I'd still like to know if there was any actual failure in his previous supercharger... why not just have it rebuilt instead of buying a brand new one?).
Failed spark plugs on the other hand can make an engine run like cwap (he mentioned hesitation when applying throttle and then barely getting over ~5K rpm's) and they don't trigger any check engine light warning I've found. I could not tell a failed spark plug from a brand new spark plug just looking at them visually so how does the OP know his spark plugs are all "sparking" correctly under compression? It's only a couple bucks a plug and some 20 minutes to change them out... worth a shot, IMHO.
Regards!
- Michael
red2blue
New Member
Sounds almost like it's choking....TB isn't working properly....IC clogged. Or...a boost leak...still hasn't mentioned what r's he's turning.
In the first post the sc was replaced before prob occured...in the second...the other way around.
Something is missing...information wise.
In the first post the sc was replaced before prob occured...in the second...the other way around.
Something is missing...information wise.
Michael211_2000
Well-Known Member
Yes, he did: "The maximum speed it can go is 35 mph at 5100 rpm.problem occur before supercharge was install"
My opinion from riding my own RXT, with 3/4 tank of fuel and just me on it 5100 rpm's is already getting into the 40's as I recall it only takes ~4600 rpm's to run mid-30's... 35mph seems a bit sluggish for 5100 rpm's, but that is another issue something in the pump perhaps he should be able to turn much higher than 5100 rpm's that's far below what the non-supercharged 155hp models are capable of.
- Michael
Michael211_2000
Well-Known Member
Ok, good that you're keeping up with required maintenance then. However I still recommend trying a fresh from the box set of spark plugs in this case. Just because they're inexpensive and easy to replace and may improve the situation if even 1 of your 10hrs plugs has failed.
When was the last time you rode it when it did get over 35mph and higher than ~5100 rpm's? Did it suddenly lose power during that ride, or did this occur from 1 ride to the next time you took it out? Do you use fuel stabilizers/cleaners in every fillup, or not at all? What's in the tank now, is the fuel fresh and 92-93 octane are there any additives in it? If the fuel is good and you don't have any additives in it already, try topping the tank off and putting a can of SeaFoam in the tank and then go ride it an hour or two. A dirty fuel system can cause the problems you describe also and SeaFoam can clean that up quite a bit.
All we can do here is brainstorm based on what you tell us it's doing and what you've done to try and correct the problem, nobody has a cystal ball that can say "this is what his problem is!" At the end of the day if nothing we here suggest changes anything you may just have to take it in to a ... (gasp!)... dealership! Arghhhhh! :-O
- Michael
red2blue
New Member
My mistake.
If the motor sounds like crap when he's wide open...boost leak would be my bet.
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