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Hi Everybody, I have a very strange problem, sometimes after a few minutes of driving my sami it stops, when i pull the hose from in front of the fuel pump (carb model) it seems like there is a blockage and there is negative pressure, when i start the sami with the hose off it starts fine then when i reconect the hose again and drive about 30 mins it does the same thing, i changed filters and it worked good for a day then did the same thing next day, i have taken off the tank and drained it, there are just micro sediments in the tank but noting so large to block fuel lines , please help
 

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Have you tried driving with the gas cap off? If that fixes it, then your tank is not venting properly and it is building up negative pressure.

This hose in front of the fuel pump, where does it go to?
 

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i would test the fuel pump. for volume and correct pressure.if you changed the fuel filter then i think its the pump is gone.
 
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