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Hello. Need input on Fuel issue.

1591 Views 13 Replies 5 Participants Last post by  Lobo
Hello to all I was glad to run across this forum. I am hoping to get some good input and questions answered as well. I have a 2013 TRX420TE that up until now has been problem free. This past weekend I was riding for the first tim this year and at about 14 miles of trail riding the motor died just like it ran out of gas. The Petcock valve was in the fuel on position. After turning the switch off and back a few times it fired back up and ran fine for a few minutes then did it again. To make a long story short I noticed the fuel pump was not cycling most of the times I turned the switch on. I removed fuel pump canister assembly. Ordered a now unit from local dealership. Installed with new rubber seal and locking connector on pressurized hose. Was going to drain the fuel tank via the hose coming off the petcock valve and only get a slight dribble. Surely i have a clogged or gummed up tank / line / valve or all the above? How much fuel flow should I have at the hose from the tank that fills the fuel bowl at the fuel pump? Thanks in advance for helpful info and sorry this is so long but wanted to give as much info as possible on what happened.
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as said^^^^, time to clean the whole fuel system, starting at the tank, and working you're way to the throttle body. have you inspected the fuel cut-off replay to make sure you are indeed getting power to the new fuel pump ?. I dont have much faith in fuel pumps on the trx420's, they failed right out of the gate.
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as said^^^^, time to clean the whole fuel system, starting at the tank, and working you're way to the throttle body. have you inspected the fuel cut-off replay to make sure you are indeed getting power to the new fuel pump ?. I dont have much faith in fuel pumps on the trx420's, they failed right out of the gate.
Well I took the tank off today after work. Flipped it upside down and emptied it into a bucket. Shot 90 PSI compressed air through the hose on the petcock with it in the on position and also in reserve position. Filled tank half full with water and still only had small “dribble” coming out. Emptied tank again, removed fuel petcock valve with impact wrench to avoid spinning nutserts and found that the screen membrane on the petcock is toast. Very deteriorated and all broken up in chips. Removed fuel gauge to allow better visibility inside the tank and saw chips all inside. Duct taped a piece of 1/2” copper tubing to the suction hose on my shop vac to allow easy access and vacuumed the tank really good. Rinsed with water and vacuumed again. Stuck air hose in tank filler neck and packed a clean rag around it. Let air hose blow air into tank for 30 minutes to dry tank inside. Looked at inside of tank and it is spotless.
Will check / clean the throttle body tomorrow and install a new spark plug. Will order a new OEM (not Chinese aftermarket junk) from our local dealership on Tuesday morning when they open up

I installed the new fuel pump but never did connect the fuel supply hose because I decided to drain the tank via the petcock valve. Thus the dribble coming out so I haven’t turned the ignition on or anything yet. If the new petcock and other mentioned above details don’t fix it, I will check for voltage. Thanks
blowing air back into the petcock, while turning the lever in all positions, with cap off, you should be able to hear air inside the tank ?, if your not ?, then the petcock is gummed up real bad. fuel pump does not have to be installed on the petcock to do this :). rubber hose, or just the air blower to the petcock, burst of air while moving petcock lever in all positions should tell you if the petcock if working or not ? :).
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