Speed of fuel flow in fuel lines? (As in empty fuel line...)
Speed of fuel flow in fuel lines? (As in empty fuel line...)
(OP)
Electric fuel pump. Gas tank in rear of vehicle...
Say you have a bad fuel pump check valve and overnight all the fuel drains back into the gas tank. And the fuel line is filled with air.
How fast does the fuel flow when the pump is turned back on?
Or how long would it take for the fuel to reach the engine?
(This would be assuming that there is a fuel pressure regulator and this regulator is sending excess fuel (air) back into the gas tank via the return line. If this is the way it works?)
Say you have a bad fuel pump check valve and overnight all the fuel drains back into the gas tank. And the fuel line is filled with air.
How fast does the fuel flow when the pump is turned back on?
Or how long would it take for the fuel to reach the engine?
(This would be assuming that there is a fuel pressure regulator and this regulator is sending excess fuel (air) back into the gas tank via the return line. If this is the way it works?)





RE: Speed of fuel flow in fuel lines? (As in empty fuel line...)
Regards
Pat
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RE: Speed of fuel flow in fuel lines? (As in empty fuel line...)
Bill
RE: Speed of fuel flow in fuel lines? (As in empty fuel line...)
How quickly the pump regains its prime is another matter entirely.
Norm
RE: Speed of fuel flow in fuel lines? (As in empty fuel line...)
Bill
RE: Speed of fuel flow in fuel lines? (As in empty fuel line...)
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Speed of fuel flow in fuel lines? (As in empty fuel line...)
Anything thats less than about 10 years old, or that isn't a top HP machine will probably have a turbine. That doesn't mean to say that it WILL BE turbine, there's still quite a few OEMs using Gerotors and Bosch-type roller cells, just not as numerous as a few years back.
bill190 - what's the pump and/or vehicle in question?
Bill
RE: Speed of fuel flow in fuel lines? (As in empty fuel line...)
So I was wondering if fuel was draining back into the tank by morning (due to a faulty check valve), and the time it takes to start the vehicle in the morning is the time it takes for the fuel to get back in the lines?