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RpFarm25

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  1. I've got a 2014 Honda Trx420 that I'm having some issues with all of a sudden. I don't have very much experience with fuel injection so hoping someone can point me in the right direction. I bought this unit new and I've never had any issues with it ever until now. When I first start it, it seams to take a few extra cranks to fire up than usual, and then when it does fire it will only run for a second or 2 and then die out right away. Without cycling the key off and on again, I can crank it again and the same thing happens, running a little rough and then dies out again. A few more of these and it will start to slowly run a little longer each time, until finally the engine will idle on it's own. After its been idling for a little while and the engine seams to be at operating temps, then it seams to run great, I have no issues with idling or lack of power after that, and I can shut it off and it will start back up right away, unless I let it sit again for a few hours and then it's back to the beginning. New spark plug, Clean fuel tank, new gas and never sits long enough for the gas to go bad anyway. Battery shows 12 volts and battery tester shows good when a load is put on. I quickly checked the IACV and looked a little dirty so I cleaned it up and cycled the key with it removed and it spun the way it should. No change. I can hear the fuel pump running as normal when I first turn the key on. Computer isn't flashing any codes or engine light either. Put an an inline spark tester on to make sure nothing was shutting off the spark and it shows good consistent spark. I thought at first that it might be starving for fuel, but seams odd that it would get better once it was running for a while? Going to take the fuel pump out of the tank today and make sure everything is clean. Dealer told me it's probably the fuel pump and $400 for a new one, but seams odd it runs perfectly after a while. Again I lack experience with these new models so I appreciate any and all advice before I start throwing replacement parts at it blindly. I use this machine nearly everyday on my farm and with calving coming up soon I need it to be reliable again. Thanks
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