Who’s drained fuel from a return system
- Thread starter BlckBox04
- Start date
I disconnected the hose at the rail and made an extension to reach the gas can I put by the fender. Then turned the key and let it run until the tank was empty.
This, I put a ball valve on one end as well
Not sure what your wiring set up is, but I jumped the Hobbs switch to run the pump full time for pressure testing.
If I had to drain I’d probably pull a like off the regulator
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If I had to drain I’d probably pull a like off the regulator
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The inlet to the Y block would probably be best. I'm not sure how well it would work if you left one rail connected while using the other line to drain the system.
I plan on taking the feed hose off the filter, turning the pumps on, and draining it into a gas can.
that’s what I was thinking
I was going to try this also. This actually seems like the easiest way
All I know is as soon as I turn the key on the pump runs
This^
Any recommendations on emptying a OEM Fuel system and tank?
people have posted in the past about jumping the relay for the pump or having a tune that runs the pump full time. Not sure what line you would pull though, I think most people doing this had at least aftermarket rails with an AN fitting to undo.
Go WOT a lot...it empties quick.
What if the car isn't running? lol
Jumping at the plug under the back bumper will probably be your best bet. The only issue I see is coming up with a drain hose.
Maybe you can make something like this work. Just add a hose from here to a can.
This is my plan I'm leaning towards. I have and MS3 so I can hopefully try to figure out how to get a file to have the pumps run with key on, then my plan was to unhook at the fuel filter and put a line to a gas tank.
Under the fuel pump there's an On/Off option IIRC. If you pick that it should drive the pumps full time.
I connected a pump to the fuel pump line and hand pumped it empty.
Well another reason I like my pumps running full time with the key ignition set to "on".
I disconnect the AN fitting after the fuel filter which is located under the passenger side door. Then I attach another AN fitting and hose and run that to a 5 gallon jug. Then I turn the ignition on.
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I disconnect the AN fitting after the fuel filter which is located under the passenger side door. Then I attach another AN fitting and hose and run that to a 5 gallon jug. Then I turn the ignition on.
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For anyone that runs into this problem/idea that runs a MS3 and stock fuel system, I figured it out and have some directions:
I had to change the fuel pump settings from closed loop to on/off. Then entered test I/O mode and with the duty cycle change to 48%, that's what allowed me to activate the pumps. I kept the 78Hz frequency. Fuel will hold pressure at the rail area so I disconnected at the fuel filter and hooked up a line that ran into a gas tank. I changed my fuel filter while I was under there and could tell it needed it. I had my car connected to a battery charger/tender and cycled the pump on for 20-30sec and then off for the same amount of time. I noticed towards the end the pumps would make a different noise compared to a full tank and I immediately stopped the process to not burn out the pumps when I heard that change. It took a little while but didn't have to drop the tank or anything special. The tank capacity is a little over 15gal so I filled a 5gal nearly three times and the gauge is reading nearly on empty.
I had to change the fuel pump settings from closed loop to on/off. Then entered test I/O mode and with the duty cycle change to 48%, that's what allowed me to activate the pumps. I kept the 78Hz frequency. Fuel will hold pressure at the rail area so I disconnected at the fuel filter and hooked up a line that ran into a gas tank. I changed my fuel filter while I was under there and could tell it needed it. I had my car connected to a battery charger/tender and cycled the pump on for 20-30sec and then off for the same amount of time. I noticed towards the end the pumps would make a different noise compared to a full tank and I immediately stopped the process to not burn out the pumps when I heard that change. It took a little while but didn't have to drop the tank or anything special. The tank capacity is a little over 15gal so I filled a 5gal nearly three times and the gauge is reading nearly on empty.
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