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Old 03-25-2015, 01:05 PM   #1
immortal
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Default Drain fuel tank for 2015 WRX?

Is there a simple way (besides pulling the fuel pump and siphoning from directly above tank) to drain the fuel out of a 2015 WRX?

My research has shown alternative methods for previous generation cars, but nothing that would be the same for 2015.

Anyone have any ideas?

Thanks
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Old 03-25-2015, 01:14 PM   #2
SoapBox
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Don't spare us the details! Why would you want to do that?

You could hook 12v to the pump and detach one of the lines for collecting.

Not sure if there's anything in the way, but can't you pump via the fuel filler neck and a small conduit snaked into the tank? Won't get all of it, but most of it.

Just tossing out no-so-hot ideas...you could slice a -T- into the line under the chassis, and start the car...

What do you think is so different about doing it on a '15 vs. another year car?
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Old 03-25-2015, 01:18 PM   #3
JohnM10
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Start up the car and wait until it runs out of gas
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Old 03-25-2015, 01:19 PM   #4
SoapBox
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Quote:
Originally Posted by JohnM10 View Post
Drive the car until you run out of gas and tow it home
Park it in the driveway with a brick on the go-pedal, then tow it to a gas station.




This is an odd question for someone to ask...unless someone filled it with diesel or something.

If you're doing anything to the car which involves needing the tank drained, you're smart enough to know how to do it.
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Old 03-25-2015, 01:27 PM   #5
immortal
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Quote:
Originally Posted by SoapBox View Post
Don't spare us the details! Why would you want to do that?

You could hook 12v to the pump and detach one of the lines for collecting.

Not sure if there's anything in the way, but can't you pump via the fuel filler neck and a small conduit snaked into the tank? Won't get all of it, but most of it.

Just tossing out no-so-hot ideas...you could slice a -T- into the line under the chassis, and start the car...

What do you think is so different about doing it on a '15 vs. another year car?
I am sparing the details They are not relevant!...naw.. I am draining E85, wanted to put regular octane in. I thought I barely had any left when I unhooked my kit, but realized afterwards I had a little over half a tank so I was just trying to get some out before putting 91 octane in. I just wanted technical information to know if there were any other clear cut methods to getting the fuel out that I was overlooking.

I tried snaking into the fuel filler with a 1/4" hose and siphon pump, but I'm guessing due to the anti-siphon mechanisms I was not able to get anything pumping out. Couldn't get it in all the way...was wet on the sides of the tube, but that is all.

Previous generations it seems you can unhook the fuel return line and connect some 'green ecu' plugs together under the passenger side carpet that would allow you to turn car to 'ON' and the fuel pump would run. Not an option for our DIT... Also previous generations had a drain on the tank...again not option for ours.

The best method I have found now is to run a hose from the fuel line under the hood into a bucket and just turn the key 'on' and drain an ounce at a time... got about ~800 key turns to go with this method...which is probably what I'll end up doing
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Old 03-25-2015, 01:29 PM   #6
SoapBox
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N55 E84, AKA REX8

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Quote:
Originally Posted by immortal View Post
I am sparing the details They are not relevant!...naw.. I am draining E85, wanted to put regular octane in. I thought I barely had any left when I unhooked my kit, but realized afterwards I had a little over half a tank so I was just trying to get some out before putting 91 octane in. I just wanted technical information to know if there were any other clear cut methods to getting the fuel out that I was overlooking.

I tried snaking into the fuel filler with a 1/4" hose and siphon pump, but I'm guessing due to the anti-siphon mechanisms I was not able to get anything pumping out. Couldn't get it in all the way...was wet on the sides of the tube, but that is all.

Previous generations it seems you can unhook the fuel return line and connect some 'green ecu' plugs together under the passenger side carpet that would allow you to turn car to 'ON' and the fuel pump would run. Not an option for our DIT... Also previous generations had a drain on the tank...again not option for ours.

The best method I have found now is to run a hose from the fuel line under the hood into a bucket and just turn the key 'on' and drain an ounce at a time... got about ~800 key turns to go with this method...which is probably what I'll end up doing
Where's the pump relay? How hard is it to just put 12v on the pump to avoid the 800 primes?

Isn't dropping the tank all together easier than that?


Edit:

1/2 a tank of E85 left? I'd just fill it drive it easy, top it off again after a gallon or two has burned off, etc. Not worth it. It will be fine at low-load burning through a 1/2 tank of E85.

You'll be fine. http://www.fillyourtankwithfreedom.c...-only-car.html

Last edited by SoapBox; 03-25-2015 at 01:36 PM.
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Old 03-25-2015, 01:35 PM   #7
immortal
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Quote:
Originally Posted by SoapBox View Post
Where's the pump relay? How hard is it to just put 12v on the pump to avoid the 800 primes?

Isn't dropping the tank all together easier than that?


Edit: 1/2 a tank of E85 left? I'd just fill it drive it easy, top it off again after a gallon or two has burned off, etc. Not worth it. It will be fine at low-load burning through a 1/2 tank of E85.
Thanks for the tip...I only wanted to get a gallon or two out to feel safer.... I'll probably prime out a gallon or two and fill up with 91... thanks for the reassurance.
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Old 03-25-2015, 01:39 PM   #8
Loyale93
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Why would the method for draining the tank in a 2015 be different from draining the tank of a 2014?? Did they massively change the fuel system??
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Old 03-25-2015, 01:43 PM   #9
SoapBox
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Quote:
Originally Posted by Loyale93 View Post
Why would the method for draining the tank in a 2015 be different from draining the tank of a 2014?? Did they massively change the fuel system??
Yeah, with the DIT changeover. That being said, draining it in conventional ways (dropping the tank, pulling the pump and dripping in a siphoning line, etc. are all generally the same.

Anyway, no need to drain it for a 1/2 tank of E85. No biggie.
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Old 03-25-2015, 01:50 PM   #10
Scooby Jay
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In Clark Turner's E85 thread he talks about just unhooking the line in the engine compartment at the fuel rail i presume and power probing the fuel pump in the tank.
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Old 03-25-2015, 04:49 PM   #11
Loyale93
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Default

Quote:
Originally Posted by SoapBox View Post
Yeah, with the DIT changeover. That being said, draining it in conventional ways (dropping the tank, pulling the pump and dripping in a siphoning line, etc. are all generally the same.

Anyway, no need to drain it for a 1/2 tank of E85. No biggie.
That's kind of my point. The fuel pump didn't change. Tank didn't change. Sure the injectors, rails, etc. up in the engine bay changed, but most methods don't have anything to do with that. Pull the pump, drop the tank, disconnect a line and run power to the pump... All the same whether you're in a 2015, a 2003, or a Ford.
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Old 03-25-2015, 08:10 PM   #12
Uncle Scotty
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****....just fill it up with 93 and drive it around easy on the highway on cruze at 70...run it down and forgetaboutit

why over complicate wiping yer ass????
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