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Old 12-15-2012, 09:45 AM
Jayxcr Jayxcr is offline
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Default Help... 09 dragon 800 goes in limp mode?

One of my riding buddies has an 09 dragon 800 that runs great but at least twice a day when riding it goes into what I call limp mode. It doesn't kill but it's like in a stutter mode. He has to shut it off then restart and he is good to go! He has just gotten used to it but I was hoping somebody may have run into this before. Btw ... It's not getting hot or anything, just does it when it wants. The dealer doesn't know either why it's happening. Thx!
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Old 12-15-2012, 10:40 AM
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If the ECM sees detonation, first it turns on the engine light in the guage cluster. If the rider doesn't see it and back off the throttle (or ignores it), "limp" mode gets activated. The only way to reset that is to shut the sled down and restart. The first assumption I'll make is that the sled has no modifications (no pipe, head or can). Typically, if "limp" mode is being activated, the sled is running substandard fuel, has fuel with ethanol added but the ethanol fuel wires aren't in the proper configuration or there is a fuel mapping problem that will require an add-on fuel controller to correct. My own 800 would regularly activate the limp mode just before the exhaust valves would open (around 6800RPM). If I blasted right through that RPM, no problem. Likewise if I stayed well below it. No flash Polaris offered would correct it and it made little difference what fuel I used in it. My only option was to add a fuel controller and that allowed me to eliminate the problem entirely.
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Old 12-15-2012, 10:56 AM
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Thanks Rocket! This gives me some things to look into. The only modification he has is an slp can, and the dealer sold him a controller, a Dynojet 5 commander. It did seem to make slightly more power but sled still goes into limp mode alot. I need to check his fuel setting if he is running ethanol.
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Old 12-15-2012, 01:19 PM
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Quote:
Originally Posted by Jayxcr View Post
Thanks Rocket! This gives me some things to look into. The only modification he has is an slp can, and the dealer sold him a controller, a Dynojet 5 commander. It did seem to make slightly more power but sled still goes into limp mode alot. I need to check his fuel setting if he is running ethanol.
A quick way to diagnose the detonation issue is to add approx 1-2 gallons of RACE fuel into a full tank of reg 91 octane and go out and test drive it
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Old 12-16-2012, 09:33 AM
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Kraven has a good suggestion about testing with a bit of race gas in the tank. If the problem disappears, then you know for sure its detonation. As far as the ethanol wires go, they do make a noticeable difference in fuel calibration. I will mention that I set my fuel controller map up around fuel with ethanol added and just left it alone. Sure, I was leaving a bit of HP on the table for those few times I didn't have fuel with ethanol added, but I felt it was better being "safe" and not having to guess what fuel I had in the tank. You mention the sled has a fuel controller on it - what map is running in it? Something that SLP provided or ?? Since the sled has a can, it could be possible the map was designed around a "stock" sled and the can is changing things just enough to create detonation. The good news is that with the fuel controller, you already have the tools in place to make adjustments if you need to.
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Old 12-16-2012, 01:28 PM
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Sounds like it may be hitting the rev limiter which they will do when the motor and clutches aren't loaded enough. Try adding a little more weight to the primary clutch.
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Old 12-16-2012, 03:36 PM
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He got the controller from our dealer so not sure what mapping is in it. I will check with them and maybe it can be remapped if necessary. I like the idea of adding some race gas, will see if that makes any difference. Also a good point to check his clutching, we were riding at low elevation last week and I'm sure he is using his mountain weights so it's going to WAY over rev.
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Old 12-17-2012, 11:06 AM
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Angry dragon

Just another **** map from Polaris! I don't even remember what the map you're running was called (June?) anyway it was the best map for the low ed stumble but as you said goes into limp mode right around 6800. You definately need a controller to get the fuel figured out in this rpm range. I for one think the mapping from Polaris is just too sensitive and the sled is just fine! Running quick on the trails with a bunch of guys and the sled goes into limp mode can be a hair raising experience as your sleds power is cut and everyone else is running up your arse because you have to shut off your sled and re-start it (brilliant feature in the mapping) - NOT!!!!
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Old 01-01-2013, 12:49 AM
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I would reccommend starting with the cheapest and easiest possible solution. I had the exact same issue a few times and mine was fuel related. I never had an issue again with "limp mode" after I started running fresh clear gas. I have heard the det sensor is very sensitive to fuel quality.
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Old 01-02-2013, 09:18 AM
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Old 01-02-2013, 11:33 AM
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Old 01-02-2013, 12:33 PM
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Old 01-03-2013, 06:44 AM
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Old 01-03-2013, 05:07 PM
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Old 01-04-2013, 07:36 PM
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