I have a 08 BD pump gas turboed 800 dragon. It has been working good. I went on holidays up north and went for a couple of trail rides with some friends. The sled worked good. It then was on my truck for the rest of the week then the 1100km drive home. I then went to start it in my garage after getting home and it will not idle down. It stays up at around 2400 rpm. Any suggestions what it could be? Also the way it is tuned now at about 4000ft and up it runs great. I have been running psi# 39,47,52. At lower elevation it doesn't run as good. I was thinking I had to increase the #'s to give it more fuel at lower elevation to get the sputter out of it. I can not clear it up. What #'s have you guy's been running at lower elevation and with what EGT'S.
Will not idle down.
- Thread starter ridgeclimber
- Start date
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jskattum606
Well-known member
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EricW
Well-known member
This is something I fabbed to an intercooler, but it is the OEM Polaris boot and aftermarket brace mentioned above. Look the stock intake boot over real good to look for the splits/delamination mentioned above. Your gonna want the boot brace anyway, so might as well pull the throttle bodies to get a good look. Might as well look the reed pedals over while your in there too. Give a shout/pm if you need help with any of this. Have a good one. EW
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theshadowrider
Well-known member
where did you get that brace/bracket?
Will not idle down
Thanks guy's for the suggestion. I already have the delamination plate on my throttle body boot. I have inspected the boot from what little I can see with out disassembling any thing. Nothing obviously wrong. The last ride I just had it up to about 8 psi boost. I have been running a couple of gallons per tank of VP c12 and the rest topped off with premium 94 octane. I have had it up to 10.7 psi with at least 50/50 race fuel. I was starting to wonder if I could of ripped a crank seal. When I was up north on holidays it went down to -15 c. I went to the local car wash to wash my sled off before I put my cover on for the trip home. I think I started it after I washed it but after it was sitting for a while. Could the water of froze to the crank and the seal? Then got ripped when I started it? Or are the seals quite protected? Just an idea.
Thanks guy's for the suggestion. I already have the delamination plate on my throttle body boot. I have inspected the boot from what little I can see with out disassembling any thing. Nothing obviously wrong. The last ride I just had it up to about 8 psi boost. I have been running a couple of gallons per tank of VP c12 and the rest topped off with premium 94 octane. I have had it up to 10.7 psi with at least 50/50 race fuel. I was starting to wonder if I could of ripped a crank seal. When I was up north on holidays it went down to -15 c. I went to the local car wash to wash my sled off before I put my cover on for the trip home. I think I started it after I washed it but after it was sitting for a while. Could the water of froze to the crank and the seal? Then got ripped when I started it? Or are the seals quite protected? Just an idea.
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mngoat
Active member
When i had a bad crank seal my sled ran like crap....sounds like your is running decent yet. I have a 08 dragon 800 with an ovs turbo that idles high(2400) at low elevation but when it gets above 6000 feet idles perfect. Don't ride much at low elevations except to get it on the trailer and short trail rides so didn't look into very much for the past 2 years. Finally this year i checked and set the TPS with a homemade tool and this seems to have solved the problem as it idle the same at high and low elevations now. Goofy.
Just to let you guy's know I found the problem causing my sled to idle high. I disassembled the charge tube, mini cooler, throttle bodies and the intake boot. It was ripped fairly badly. Hopefully it didn't lean it out enough to cause any damage. It ripped on the inside of the delaminating plate. I could not see until I had it right off. I still have to put it back together though. I was wondering what you guy's thought about removing the rear mini cooler rubber stud mount and bolting it solid to the oem mount with the angle bracket. With the rubber mount the mini cooler and the charge tube all flexes quite abit. I wonder if that bouncing around and the extra boost pressure is causing it to fail premature.
Checked reeds
Thanks for the suggestion. I planned on inspecting the reeds carefully when I had it apart. Its funny that you explained it exactly what happened to the reeds. There was at least three reed pedals on each side that were not sealing at all. None were broke or chipped thankfully. I just replaced them with an OEM set.
Thanks for the suggestion. I planned on inspecting the reeds carefully when I had it apart. Its funny that you explained it exactly what happened to the reeds. There was at least three reed pedals on each side that were not sealing at all. None were broke or chipped thankfully. I just replaced them with an OEM set.
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theshadowrider
Well-known member
Do you have some pictures that you could post?
