Twospeed

No wise cracks about driving, please
My car has been sitting in my garage for some time, the gas has gone bad. Back fireing through the exhaust, very rough idle.
Here is my question. How do I drain/remove gas from the tank/tanks without having to drop them? I tried to put a hose from a manual pump down through the gas tank filler, but it will not go down far enough to make contact with the fuel. Help
Thanks in advance

vettenuts

Are they full?

Twospeed

around half

torchredfrc

The service manual says you can drain the tanks using an air operated pump device and flexible fuel hose on the fuel feed pip nipple on the pump. This nipple is the lower of the 3 on the pump from the image in my manual.

I too tried to siphon the gas out through the filler neck and it seems there is a anti-siphon device stopping my hose from reaching the fuel. Gonna try what the service manual suggests since my pump is dead.

If your pump is working and you don't want to get under the car you could always use a fuel pressure gauge on the valve at the fuel rail and bleed it off using the gauge. I was able to get my pump to pump ~6 gallons out this way before it completely died on me.

099blancoss

You could also use a fitting in place of the schrader on the rail and use the pump

FirethornC5

http://www.aacorvette.com/pdf/aa_fue...structions.pdf

Basically you need to:

Relieve the fuel pressure from the Schraeder valve

Get a bucket

Remove the fuel supply line at the firewall

Attach a clear hose to supply line at firewall

Put the hose in the bucket

Remove the Fuel Pump relay

Jump the fuel pump relay

leadfoot4

I'm sure that that method would work, but isn't that going to send all the crappy fuel through the fuel filter, potentially trashing it?

Goody

Sitting for how long?? Months or years? Did you try some octane booster to liven it back up first??? If that works then give it the Sea Foam treatment and then replace the fuel filter.

03newjersey

For two years my stock 03 sat unused without fuel stabilizer and when I started it up this past Spring I had no problems. I worried that old gas would be a problem and regretted not putting in fuel stabilizer. Recently my 1935 Ford Street Rod had sat for 5 years without fuel stabilizer and yet it started right up. For the past 25 years or so I have never drained the fuel on any vehicle, snow blower or lawn mower that I have owned, and I never had a problem with old or bad fuel. I see you have some minor modifications to your motor my suggestion is to check them first then look at your plugs and wires. Draining your tank seems like a big job I would check other things under the hood that causes backfires like bad plugs and wires. Good luck

Note: On my old Ford the only problem after sitting for 5 years was dried out gaskets on the carburetor which cause it to leak a little fuel. New gasket kit fixed that easy.