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08-28-2010, 02:35 PM
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Junior Member
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Member #4105
Join Date: Apr 2010
Posts: 4
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power loss on 500 sportsman
2008 sportsman 500 efi. will not achieve higher rpms, it started bogging down only when the engine was hot, but now it will seldom reach 6000. The only way i can get it to rev top end is if i take the air intake cover off. no blockage can be found. Could this be electrical?
Ken
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08-28-2010, 02:46 PM
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Super Moderator
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Member #230
Join Date: Feb 2009
Location: The UP of Michigan
Posts: 5,560
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is your airfilter dirty?
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08-28-2010, 03:21 PM
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Junior Member
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Member #4105
Join Date: Apr 2010
Posts: 4
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the air filter looks fine.
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08-28-2010, 03:56 PM
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ATV Enthusiast
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Member #6734
Join Date: Aug 2010
Location: Boston, MA
Posts: 61
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Did you try fuel injector cleaner?
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09-03-2010, 02:50 PM
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ATV Enthusiast
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Member #5561
Join Date: Jun 2010
Location: Waco, TX
Posts: 30
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Make sure there's no dirt diver nests in the tunnel lid. I've had that happen to my old Honda.
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09-03-2010, 03:13 PM
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Junior Member
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Member #4105
Join Date: Apr 2010
Posts: 4
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thanks guys but the only thing thats helps is taking the filter tunnel off. Then I have more power than ever before, and the engine seems to runs cooler. Could there be a air flow sensor thats messing with me. Im very green with this sort of thing, so any help would be appreciated.
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