Fuel System
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From: Home Base Nebraska
Fuel System
Is the fuel system pressurized or under a vacuum? I'm almost sure it's pressure and if it is how do they pressurize it. I'm having trouble with my aux fuel tank setting the loose fuel cap alarm. I only happens when it's empty and the main tank is at half, I think its a volume thing but not sure. The only thing I changed when I installed it in this truck is I removed a piece of plastic that was blocking the vent line, I may have to block it back off. I vent into the vapor recovery line in the filler neck.
Denny
Denny
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From: Home Base Nebraska
That explains whats going on, my fuel cap on my tank has a one way valve that will allow air to be drawn into the tank so when I unplugged the vent it screwed up the system. I will try and find a cap with no vent at all.
Denny
Denny
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I dont no the configuration of your system but if there no other vent on that tank, do not install a cap with no vent,when the tank get lower in fuel a vacuum will be create by itself, or you starve in fuel pressure or the tank shrink.you must install a tube on that aux tank and joint it to the main system on the truck.Be careful not every mecanic
anderstand well the evaporative system and how its work.
good lock
anderstand well the evaporative system and how its work.
good lock
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From: Home Base Nebraska
The tanks vent is tied to the trucks venting system, I have hooked the same tank to my 91 F250 and 2000 F350 the same way. The only that has changed is I unplugged the vent pipe.
Denny
Denny
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I guess I circumvented that issue while being unaware of it.
I have a 12 volt shut off valve in line with the pump that draws the fuel from the aux. So when I turn off the switch the line is closed by the valve also - did that to insure no siphoning.
I vented the aux via a hose and filter down thru the truck bed and to the atmosphere. The aux tank has a roll over valve in it also.
I have a 12 volt shut off valve in line with the pump that draws the fuel from the aux. So when I turn off the switch the line is closed by the valve also - did that to insure no siphoning.
I vented the aux via a hose and filter down thru the truck bed and to the atmosphere. The aux tank has a roll over valve in it also.
Thread Starter
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Joined: May 2004
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From: Home Base Nebraska
I guess I circumvented that issue while being unaware of it.
I have a 12 volt shut off valve in line with the pump that draws the fuel from the aux. So when I turn off the switch the line is closed by the valve also - did that to insure no siphoning.
I vented the aux via a hose and filter down thru the truck bed and to the atmosphere. The aux tank has a roll over valve in it also.
I have a 12 volt shut off valve in line with the pump that draws the fuel from the aux. So when I turn off the switch the line is closed by the valve also - did that to insure no siphoning.
I vented the aux via a hose and filter down thru the truck bed and to the atmosphere. The aux tank has a roll over valve in it also.
Denny
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