I have a 2005 Arctic Cat 500 that will crank and run great. Push the throttle acts starving for gas. I have replaced the fuel filter, fuel line, and cleaned the tank. Also replaced carb. NEED HELP!

Based on the information you have provided, there are a few possible causes for the issues with your 2011 Arctic Cat 550 EFI. Here are some suggestions for troubleshooting:

Check the fuel injectors: If the fuel injectors are clogged or dirty, it can cause issues with starting and idling. You may need to clean or replace the fuel injectors.

Check the fuel pressure regulator: If the fuel pressure regulator is not functioning properly, it can cause issues with fuel delivery to the engine. You may need to replace the fuel pressure regulator.

Check the air intake and filter: If the air intake or filter is dirty or clogged, it can cause issues with fuel delivery and combustion. You may need to clean or replace the air filter.

Check the throttle body: If the throttle body is dirty or clogged, it can cause issues with fuel delivery and combustion. You may need to clean the throttle body.

Check the ignition system: If the ignition system is faulty, it can cause issues with starting and idling. You may need to replace the spark plugs or coil.

Check the battery: If the battery is weak or not providing sufficient power, it can cause issues with starting and idling. You may need to replace the battery.

It's important to note that these are just suggestions based on the information you have provided..

Your floats are stuck or needle valve not seating properly, clean carbs, set floats and go riding. Ck fuel lines too first.

here's ino on it,,,,
https://www.countrycat.com/arctic-cat-1670-691-in-line-fuel-filter-2006-2008-660
part # listed.
hope this helps.

Need to clean that carb thoroughly. Clean or replace air filter, check gas tank vent on cap, make sure you have a good fuel stream coming out of the fuel petcock. The old gas could have clogged the petcock filter. In the picture you can see the arrows pointing to the reserve and the main. This is where the fuel comes in and it is a very fine "plastic screen mesh". This can become clogged. The one pictured us from a cat.

does it have a vacuum petcock? I'd check that. always a pita.

Hi Robert, Seems like your fuel pump is on it's way out, There's three links below, The 1st link is a youtube video showing how to test and fix a ( CAR ) fuel pump, The 2nd youtube video is a guy fix/clean an Arctic Cat EFI fuel pump and the 3rd is a youtube video of a 1998 Arctic Cat ZL 500 fuel pump...I hope they help....CHEER.

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are the fuel lines clear? also check the float in the carbureter. if it has a hole it will sink causing fuel starvation

Here are the service manuals for all Arctic cat ATVs

Parts House Lawn Mower Parts and Chain Saw Trimmer Parts

Here are the service manuals for all Arctic Cat ATVs

Parts House Lawn Mower Parts and Chain Saw Trimmer Parts

the intake could probably need to get cleaned