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2007 sportsman 700 efi.

Seems after a good 20-40 minutes of riding she starts to sputter, sounds like she's running on a single cylinder, and runs like this on and off until i shut her off for a bit. I figured it was the fuel, maybe a bit too rich, so I adjusted the TPS to a baseline of .528 volts and bumped it up to .535, tried bumping her down to lean her out too, but regardless she would still "put" while under load and after a good 20-40 mins of riding she sounds like a single cylinder and I limp her home.

As soon as I stop she basically putters out and dies unless I keep giving it gas, and even then it puts and chokes.

So, I ordered a new fuel pump, covered the bottom of my fuel tank with aluminum tape and fabricated a heat shield for the tank because who the hell thought it was a smart idea to put your fuel pump 7 inches from the damn headers.

I may be jumping the gun, but does this sound like a fuel pump issue to yall as well?

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Definitely. That can be confirmed by taking a rail pressure reading.
 
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