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I have searched for a similar thread but have not seen any problems as specific as mine; I apologize if I missed a sticky for such a problem.
My 2009 Brute Force 750i is running really strangely once it gets really hot, like after a long hill climb or ploughing snow or mudding. Up to this point it runs great; full throttle no problem, lots of power. But...as soon as it gets hot, it runs really poorly after about 1/4 throttle. If you let it cool for 10 minutes, it will run just fine until it gets hot again. Once hot, if you hold the throttle at full, it revs/pulses, kind of like limp-mode.
It does not appear to be in limp-mode as the light does not flash and it goes away if you let it cool. If you let it cool for, say, ten minutes, it will take 2 minutes of riding to start doing this again. If you let it cool for an hour, you will get 10 minutes. If you let it cool overnight, you will get a couple of hours before it starts. Weird!!
I have swapped out the fuel pump with my buddy's (also a 2009); I still have the same problem. Same with the CPU/chip; we swapped and no difference. I put a new filter screen on the bottom of the pump (even though it was clean) just in case; that also did not help. I cleaned the air filter, it was all fine too.
Nothing seemed to lead up to this. Everything was working fine before winter, and then this started. The only thing I did before this was last summer I installed an in-line fuel filter in the fuel line a few inches from the gas tank. I don't see how this could be causing the problem, but I am at a loss to explain what is happening.
Is there another fuel pump outside of the tank, by the injectors, that I could check?
Any ideas?
Thanks
My 2009 Brute Force 750i is running really strangely once it gets really hot, like after a long hill climb or ploughing snow or mudding. Up to this point it runs great; full throttle no problem, lots of power. But...as soon as it gets hot, it runs really poorly after about 1/4 throttle. If you let it cool for 10 minutes, it will run just fine until it gets hot again. Once hot, if you hold the throttle at full, it revs/pulses, kind of like limp-mode.
It does not appear to be in limp-mode as the light does not flash and it goes away if you let it cool. If you let it cool for, say, ten minutes, it will take 2 minutes of riding to start doing this again. If you let it cool for an hour, you will get 10 minutes. If you let it cool overnight, you will get a couple of hours before it starts. Weird!!
I have swapped out the fuel pump with my buddy's (also a 2009); I still have the same problem. Same with the CPU/chip; we swapped and no difference. I put a new filter screen on the bottom of the pump (even though it was clean) just in case; that also did not help. I cleaned the air filter, it was all fine too.
Nothing seemed to lead up to this. Everything was working fine before winter, and then this started. The only thing I did before this was last summer I installed an in-line fuel filter in the fuel line a few inches from the gas tank. I don't see how this could be causing the problem, but I am at a loss to explain what is happening.
Is there another fuel pump outside of the tank, by the injectors, that I could check?
Any ideas?
Thanks
