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 NGC: H2O in fuel, Boxster

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rustyrotor
Grignapoco
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PostSubject: NGC: H2O in fuel, Boxster   Sun Dec 10, 2017 9:04 am

So I was messin with this old Porsche, got distracted, and let it run out of gas. When I got back to it, it started right up, ran for 20 secs, sputtered and died. I assumed fuel contamination or blockage, tested the theory with starter fluid. Runs on starter fluid.

I replaced the fuel filter. Water. Plenty of it. Water is what came out of the fuel lines, both ends, and the filter was full.

I've got a fresh filter in place, but what I don't want to do is fill it with water that's still in the lines or pump. There's about 1/3 of a tank of fresh gas, and I'd like to think that much E-10 would absorb a fair amount of water out of the tank. Yes? No?

So for now I've left the tank end of the fuel line disconnected at the filter, hoping for some more drainage. Not really happening that I can see.

Can anyone suggest a safe, spark-free way exists to get rid of the last of the water? Boxsters have an in-tank fuel pump.
Not going there.

The only thing I can come up with is to rig a hose to the fuel line, run it to a gas can, and turn on the ignition. IE run the pump till I see gas. Then connect the filter.

Don't like it. Sounds dodgy as F. Lots of room for bad things to happen.
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Pete Roper
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PostSubject: Re: NGC: H2O in fuel, Boxster   Sun Dec 10, 2017 11:35 am

Doesn't the tank have a drain plug?
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rustyrotor
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PostSubject: Re: NGC: H2O in fuel, Boxster   Sun Dec 10, 2017 11:49 am

No such thing.
Apparently what folks do is either what I’ve described or siphon/pump via the filler.

None of those things thrill me.
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sidrat
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PostSubject: Re: NGC: H2O in fuel, Boxster   Sun Dec 10, 2017 12:17 pm

draining is the only way, however i would simply syphon out from the top and not disturb any crap in the bottom of the tank, or as you suggest use the intank pump
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jfortenbery
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PostSubject: Re: NGC: H2O in fuel, Boxster   Sun Dec 10, 2017 1:08 pm

The gas will be on top. Water on the bottom.
Either siphon it all out (as much as possible) or run the fuel pump.

I agree w/ previous poster - those are the two options.
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eeyore
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PostSubject: Re: NGC: H2O in fuel, Boxster   Tue Dec 12, 2017 2:37 am

Without the engine running, the fuel pump will only build pressure and then stop. You will need to add a 'jumper' across the relay to force the pump to run.
Remember to remove the 'jumper' before driving the car.
Once drained, fill with 1/4 tank of fresh fuel and use the car regularly until in needs more fuel. Then add high quality fuel and a suitable stabiliser (I use briggs and stratton stabiliser in my 911 but mine has no cats).

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jfortenbery
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PostSubject: Re: NGC: H2O in fuel, Boxster   Tue Dec 12, 2017 6:57 am

It's easiest to apply 12v directly at the terminal (plastic connection) from harness to fuel pump. The connection can't be hard to find. Look for the spot where the fuel pump/sending unit attaches to tank. There are wires coming from there. Swim upstream to plastic connector, disconnect and apply
battery voltage to terminal 33. There should be tiny numbers on the plastic connector. Brown wire is always ground.
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Oz1200Guzzi
Don Abbondio
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PostSubject: Re: NGC: H2O in fuel, Boxster   Tue Dec 12, 2017 12:42 pm

Get another tank - start with known knowns...
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