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Discussion Starter · #1 ·
hello folks, my grandfather has an ext 580 efi Mountain Cat and so far nothing but problems. the sled is in mint shape but endless problems with fuel system. he will work at it untill he can figure it out and i was hoping if a you guys could help speed up his work time. ok so heres the problems! when i start it it idles up to 3500 rpm down to the point where it justabout dies then back up to 2500 rpm then down to about 1500 not a major problem but maybe theirs a solution take off it has terribe bogg and takes a whil to go if you pin it it bogs a bit then takes off once past 5000 rpm it goes away and finally cruising at about 4500 rpm throttle at the same place it boggs out doesnt stop but slows down the sled quite a bit then goes away once you giver **** again. at any other speed it doesnt do that i know my grammer is bad but im in a hurry were way up north and internet sucks.
 

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Discussion Starter · #4 ·
rail compression

its got a brand new battery as of last week and how would you check the compression?
it flashed one code just when you turn the key apparently its a good code
 
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