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2004 Polaris Ranger won't run with air cleaner cover on

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2004 Polaris Ranger won't run with air cleaner cover on

Old 10-14-2018, 12:45 PM
Weekend Warrior
Thread Starter
Join Date: Oct 2018
Posts: 1
Default 2004 Polaris Ranger won't run with air cleaner cover on

I am looking for some help
I have a 2004 500 Ranger, when I brought it home it ran good. When I took it out on the road it started to back fire and miss after about an hour.
I got it back to the shop pulled the air filter out, made sure it was clean, replaced the spark plug and gas filter. started it up and ran ok. about an hour later it started to back fire and miss then it died. would not start. took the air filter cover off and tried to start it and it ran until I went to 1/2 throttle then it started to spit and sputter. pulled the choke out and it cleared up until i took it to 3/4 throttle. I have rebuilt the carb, I have checked the timing and the cam lobs I have replaced the electric fuel pump.
I tried a different known good carb. I even took the drive belt off to make sure the transmission did not have something to do with it. It appears to be starving itself for fuel but what else am I missing? the intake between the carb and head is good (sprayed down with carb cleaner and no difference with RPM's)
After all of the things I have tried I can run up and down the road if I play with the choke and not go above 3/4 throttle and do not have the air filter cover on the air filter housing, Yes the air filter is installed just have to remove the cover for the air filter box.
Old 02-10-2019, 05:14 PM
Weekend Warrior
Join Date: Aug 2018
Location: Oklahoma
Posts: 5

My 2008 sportsman 500 ho was doing close to the same thing. I cleaned carb even out and didnít make a difference if I put my hand over the intake tube I could get it to rev up for a second or two. I ended up replacing carb and fuel pump and my ran like the day I bought it.
Old 02-11-2019, 02:02 AM
Big Frank's Avatar
Frank Flintstone
Join Date: Sep 2018
Location: Michigan
Posts: 712

How's the spark plug look?
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