c4sailor

OK, so my C4 has been sitting for several years with gas in the tank. Can I extract it from the fuel filler neck with a siphon or must I drop the tank?

pologreen1

Mine just got started on 8 year old untreated gas and stuff. Ran out fine.

Easiest way is to open the fuel line by the intake and the gas will come out, or use the pump it self.

PatternDayTrader

See if it will run first. It probably will; then go add a few gallons of fresh fuel and drive it like normal.

Tom400CFI

on both counts. IIWM, I'd try to just burn it up. But if you feel compelled to dispose of it, I'd disconnect the fuel delivery line where even is most convenient, run it into your buckets/cans, then replace the fuel pump relay w/a jumper wire.

antfarmer2

Give it a sniff if it smells like turpentine pull your fuel filter and pump it out. Then pull the pump and clean the tank. The hardest part is the filter. New parts where needed.

Don't evan think of dropping the tank LMAO

l98tpi

you can pump it out with one of the cheap syphon hand pumps from Azone or Oreillys or any parts store.

Scooter94

If the gas has ethanol in it, it will have separated by now. Don't run it that way, you could be sucking almost pure ethanol into the engine which is not good.

aklim

Here would be my solution. It might be beneficial in the long run to do it this way. Talk to Racetronix and see if they can sell you everything but the pump. I believe it is under $40. Take the old pump out, replace the dampner with the fuel rated hose and clamps they supply. Clean the threads a bit and suck out all the old fuel. Before reinstall, read up on fuel level sender problems and follow the guide to clean the sender. Reinstall, dump fuel and start.

94corvetteC4

Drill a hole at the lowest point in the tank. After all the full is out seal the hole with bubble gum.



Seriously I would see if it starts and drive it till its empty. Not sure if I would mix old and new gas unless the tank is pretty low so that you have more new than old fuel.

aklim

Any particular brand? Will chewing gum work?

If you go that route, you risk running bad gas into the system so I'd definitely run it dry, dump the plugs and oil. This is assuming it starts and runs well enough. OTOH, you won't know what debris is in the tank nor will you know if the sock is gummed up with debris. After this many years, why would you not suspect the sock?

DanielRicany

Disconnect the fuel filter and attach a 3/8" fuel hose to the fuel line. Run the line to a bucket or tank. Jump the fuel pump relay with a paper clip or power up the fuel pump manually by removing the filler neck cover.

QCVette

Won't that gum up the fuel injectors and the whole system?

aklim

It will so you have to keep the fuel warm. Drill a hole and when it comes out of the tank, let it drain onto a rag and drop a match on the rag.

jv9999

There is nothing preventing you from siphoning it out. I wouldn't even turn the key with 8 year old gas in the tank. That's just asking for trouble.

aklim

You could. But with that old gas, I would check for debris and if the windage tray is still stuck down there and if not, I might have to look into making one. Also, how do you change the sock without taking the pump off? How do you take the pulsator out and replace it with hose?

Siphoning is nice and easy but does it accomplish more than getting the gas out? For $40 or less, I can do all that.

DinoBob

I'd pull the filter line and use 12v direct to the pump to pump it out. No way I would take a chance with 8 year old fuel.