I have a clear fuel filter and sometimes when i drive it it runs out of gas although the tank is full. i can see in the filter there is no gas. sometimes it only takes a flick of the finger to get it flowing again. other times i have to take the line off the tank, turn on the fuel a little and put the hose on as it runs everywhere to get it to fill back up.
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Honestly, there are so very many potential causes for this it's really guesswork based on the info you've given. Is there gas in the car? How much?(fuel at the very bottom of the tank in an older car is likely full of schlock) Could be a failing fuel pump, a clogged fuel line, a dirty carb (if it has a carb). Could be a dirty fuel filter, water in the gas tank from condensation(particularly if it has been parked for a long time with very little gas in the tank). Just as a precaution - open up the air filter and inspect the element and the area around the mouth of the carb for obstructions. Once I found a mechanics rag in my '87 Subaru air cleaner housing that had been dragged there by ground squirrels. It was running mighty rough. Tracy, you need to get a mechanic involved here.
Everybody had a crack at this problem, another thing would check is these engines sometimes have a primary fuel filter inside the tank itself. Drain the fuel and gently blow compressed air back through fuel line towards tank then rinse the tank out with fuel, refill and try run engine again
I'm thinking you probably have already answered your own question.
Your standard fuel system usually consists of either a gravity fed system, whereby the tank is elevated on the chassis, fuel flows through the line into an inline fuel filter and then into the carb. In some systems, a fuel pump is needed to supply a better flow of fuel. You are basically saying, you took the filter off the line going from the pump to the tank, fuel flows freely which leads me to believe this may be a clogged fuel filter.
For this particular model however, there are literally dozens of potential causes, anything from a clogged fuel filter to improper fuel being used in the machine. Potentially, it could also be clogged or faulty injectors, in which case you are probably better off taking it in to a dealer to have them test that out and repair it if necessary.
Sometimes the injection pump shut off valve can be the cause as well, it doesn't reset like it's supposed to. The only way to really test that however is to simply switch the key back to the off position and then switch it back on, and see if it fires up.
You may be getting a partial vacuum lock in the fuel feed if the tank is NOT venting correctly. Your statement indicates the possibility. Many tanks vent (atmospheric pressure out and in) by the thread pattern on the fuel cap. May I suggest leaving the cap a little loose and adding some fuel system cleaner to your fuel supply. I recommend Chem Tool's Berryman B-12 (at auto parts stores). The rate is 1 ounce/gallon for cars. A little stronger dose won't hurt the carburetor. If this doesn't help, it may need to be removed and cleaned as sediment, fuel line debris and water may be in the fuel bowl (you can remove the bowl and clean it). Debris even just in the bowl will certainly cause runnability problem like yours. Try the above remedies and post back!
When that happens loosen the fuel cap and see if it stays running. If this is a gravity feed system make sure you have the correct fuel filter on it,the clear paper filters can allow vapor lock to happen,put the small briggs and stratton filter in it,which has a small chamber and a stainless screen.Also make sure there is no excess fuel line that would cause a dip or a high spot for a vapor lock to occur.