How To Get Old Fuel Out Of Car

[Wacky Dee]

I bought one of those syphoning hoses with the jiggly ball at the end that u stick in the tank through the filler and jiggle (rather than suck on the hose) but it stops about half a metre in, i'm guessing there's some sort of protection mesh in there to stop junk from falling in to the fuel tank by accident. So the hose is out..

I've read that the fuel pump can do the job by simply unhooking one of the fuel lines and turning the key to the ON position and let the fuel pump spit it all out. But where do I unhook the fuel line ?

It's an R34 GTT .. I can see the fuel line on the left hand side coming into the fuel filter .. do I disconnect it before the fuel filter or after and if so where ? Cheers

Oh yeah ..car's been sitting in the garage for 6 months with half a tank of ultimate ..something stinks really putrid, I hope its just the fuel and not some small animal that made a home in there somewhere, lived a happy life and then DIED.

[Wacky Dee]

I should add I have no way of getting under the car so whatever I do has to be through the engine bay right now

[lachlanw]

yeah just pull the line off the fuel filter

[Wacky Dee]

ok i've unplugged the fuel line on the fuel rail (just after the filter) and when switching the key to ON I can hear the fuel pump priming and it squirts about 50ml of fuel then stops

At that rate I will have to switch on/off about 500 times which i'm sure would kill my fuel pump and battery and take ages .. Is there any way to get the fuel pump to keep sending fuel without stopping ???

I'm about to take the fuel filter off and see if it keeps flowing without the fuel filter on the line but somehow I doubt it ANYONE ?!?

[D_C]

im no expert but cant you use a 12v battery charger and hook it up to the fuel pump to keep the fuel pump constantly flowing?

its not my fault if something blows up

[Birds]

Correcto!

Just short the pump. Don't let it run dry for too long though, because they tend to depend on fuel for lubication of the pump

[EJD001]

Not 100% on this...is the fuel pump actually located in the tank in the 34 or remote..

Maybe access the fuel pump, from the boot area (under the step in the boot luggage area ) and u might be able to use the pump that u got that way...

just throwing it out there.. may or maynot work?!!?!?!

[Wacky Dee]

Correcto!

Just short the pump. Don't let it run dry for too long though, because they tend to depend on fuel for lubication of the pump

How do you short the fuel pump though ? I've already searched for "short the fuel pump skyline" and whatnot earlier today on teh google but came up with nothing useful

[Wacky Dee]

hm come to think of it I do have that nissan consult cable and some software somewhere ..wonder if any of those programs can be used to make the fuel pump run at full speed to empty the tank

edit: yep looks like NIssan Datascan which I bought last year has a 'fuel pump' active test so that should do the trick ..will report tommorow

[mad082]

those jiggle syphon hoses are a bit of a pain. a much better setup to use is a boat fuel line setup. they have the bulb in the middle of them that you squeeze to such the fuel though.

also while you can use the fuel pump, it may take a while to do so. depending on how much of a hurry you are in it may be quicker to remove the panel in the boot where you access the fuel pump through and just syphon it out through there. it is a bit more fiddly to do but you will be able to syphon the fuel out quicker. but thinking about it, the extra prep time probably outweighs the gains from faster syphoning.

[Jolinator]

i usually just pull the cas out of the car and rotate it by hand, this will keep the pump on, dont fun it flat out without giving it a break. you will then have to retime the engine or use the marks that you should have written on it, however they are not always 100%accurate

[tridentt150v]

I'd do what Mad said, taking the cover off and then the big spin on top is pretty straight forward.

Otherwise a screwdriver and hammer works fine as well..................lol

[TRB-001]

easiest thing is as u said, do an active test with consult and turn the pump on until the fuel is out.... i wouldnt run it too low.

[blind_elk]

What are you going to do with the fuel once you get it out of the fuel tank?

Frankly I wouldn't be worrying about it. The fuel will still run the engine. Once you get the car out of the garage, the smell should dissipate (if it is just the fuel).

[GTR-N1]

^^^ yep or just get some more Ultimate in a can and pour it into the tank if you're concerned about starting it and then driving it to the servo to dilute the sulphur smell/effects.

Sulphur can vary in its %age by up to 100%

http://www.kittiwake.com/4_7_sulphur.com and yes, I'm aware that %ages can vary quite a bit from country to country as well as between brands - or even batches within brands.

Edit: lets's try that again... http://www.kittiwake.com/4_7_sulphur.htm

[Wacky Dee]

datascan couldnt do it ..same issue as switching ignition to ON ie. only pumps a small amount then stops.

I used Yavuz's (unigroup) suggestion which was to have the fuel return hose disconnected and run into a container .. start the car and run it until its out of fuel. Took about 10 mins with half a tank. Easy as I'm hoping the fuel filter picked up any nasty crap before it could clog my injectors.

Anyway, fresh BPU in there and the car drove without any issues.