TN90 having trouble keeping it running

[ArthurW]

Good morning I have a new holland tn90 and having a problem that I can't figure it out. So first the tractor usually starts up fine but after a few mins of driving it, starts to lose power and blue smoke comes out then shuts off. Tractor can start back up but does the same thing 2 mins later. Some days the tractor will have no problem driving but now it just keeps shutting off on me. Anyone have any ideas on what should I do cuz I changed the fuel pump and filter once. And now I am completely stuck...

 

[Utopia Texas]

Is the vent on the fuel cap clean? If the vent is plugged a vacuum can form in the tank after a while and starve the engine for fuel. Try running the engine with the cap loose or off and see if it makes any difference. I know this sounds simple but I have seen it happen more than once!

 

[ArthurW]

I just tried it with the cap off and still died after 1 min of it running

 

[Utopia Texas]

Can you get to the fuel line right after the fuel filter? Disconnect the line, engine not running, and see if you get a good stream of fuel coming out. Sounds like something is starving the engine of fuel.

 

[Coyote machine]

How old is the fuel you're running? Why did you change the fuel pump and fuel filter? How many hours on the engine? In what condition is the electrical system, especially the battery and it's ground to chassis, and wiring in general? Does it crank slow or normal when starting cold?
You say sometimes it runs fine, under what conditions? Temperature outside, etc.

 

[ArthurW]

The fuel is new, the fuel pump was changed cuz my father thought it was it and i wasnt around, engine has 4500 hours, electric system is ok i try to blow and clean it as much as i can but we an auful amount of dust on our farm so its hard to keep things clean, battery has new ground and is grounded to chassis, engine cranks over fine when its warmer than 20 degrees but we dont use it in the winter. It ran fine last summer but then in the fall it started to fall on its face and this happened the year before too.

 

[ArthurW]

actually i saw some bubbles going to the fuel pump after i cleaned off the line so i took a air hose and blew air back to the tank and hasn't shut off yet so maybe there is something in the tank that was holding the fuel up...gonna take the tank off and thourly clean it out.

 

[Smallplot]

Could have been sucking air in around fuel filter connection. Make sure everything is tightened and all seals are properly set.

 

[Jerry/MT]

Check the strainer in the tank outlet.They can clog. if you disconnect the fuel lie upstream of the filter and open the tank valve you should have a continuous full flow of fuel from the ine. If you don't, work backwards toward the fuel tank to find the restriction. Make sure the tank vent is clear. if there is a lift pump, some have a filter screen on them and that can clog.

 

[RickB]

Check the banjo fitting on the incoming side of the water separator (primary fuel filter). Debris can collect there and limit fuel flow.