How do I drain the fuel tank?

[GSP]

My car has sat for about a year. The gas doesn't smell bad but I'm sure it's not great. Whats the best way to go about draining the system?

 

[Charlie Gaudet]

Either siphon it or disconnect schrader valve at regulator and turn the key on until no more fuel comes out.


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[GSP]

I'm afraid I'll leave too much in the tank if I siphon it. But maybe not. To do it at the fuel rail I assume I will need to attach some kind of hose?

 

[Charlie Gaudet]

You would be correct sir. Catch cam and hose.


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[Charlie Gaudet]

For what it’s worth. I’ve let mine sit for a year and a half before. Give it an Italian tune up on the highway and call it a day. Marvel mystery oil in the tank and good to go. Change filter and be good. But if you want to drain the tank then so be it. Won’t hurt.


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[earlbrown]

Turning the key on won't drain the tank from the fuel rail. KOEO only runs the pump for 2 seconds.

You can siphon what you can, and pump the rest from the fuel rail. All you need is a fuel pressure test kit with a detachable hose and a jumper wire to run from the ALT post to the FP test lead.

 

[RED LS1]

How about a nice road trip and keep your foot out of it.

 

[mikes86ttop]

Drop The Tank!!!!!!
And check out all connections and hoses.. You'd be surprised what you may find...
Mike

 

[Rosey1968]

Get your self a cheap 12 volt external fuel pump from Amazon and some some hose length and drain it that way. I fill a 5gallon container to go back in my GN and the rest goes in my daily driver. Takes 10 minutes to drain a full tank then you a free to drop the tank with ease. Plus you have a pump set up going forward... should not cost more than $20 for the pump and hose.

 

[captndave737]

Easiest way is to take out the sharper valve on the fuel rail, attach a hose, ( I just used clear tubing that fit tightly over the fuel rail end) and like Earl said run a jumper wire from the back of the alternator to the FP test lead which runs the pump and you’ll be empty in 10 minutes.

If you don’t know where the test lead is it should be hanging out of the conduit attached to the DS valve cover. It’s gray.

 

[Pronto]

If you are just looking to run out the old gas for fill up of fresh gas just go for a long ride! Like RED said keep out of it and enjoy your car.