How can I drain my 850 AWD fuel tank (with dead fuel pump)

[OliG]

Hello cn90,

I already tried jumping the relay when I diagnosed than the old pump was the culprit. Even with the jumper in place, the old pump was blowing fuses. Now than the new pump is installed, I can hear it running loud and clear, no more burnt fuses, but I have no fuel at the rail. I am almost sure the problem is with the fit of the new pump in the assembly. The new pump is a bit longer than the old one, so I had to improvise (I.E. remove a gasket at the bottom of the assembly) to get it to fit. I now want to remove the pump assembly to reassemble it more carefully (and test it before putting it back in), but I need to drain my fuel tank first.

My question is again : Is it possible to syphon from the filler neck with a small hose, or is there a bulletproof anti-syphoning device in there? Do you have any other advises to get this fuel out of the tank ?

I'm gonna do this work tomorrow, so any hint I can get before will be welcome.

Thanks again !

Oli

[cn90]

Most fuel tanks these days have very tortuous filler neck (like a snake) to prevent gasoline theft.
Great idea except when it comes to servicing!!!

- Some people have had good luck with draining via the fuel filter. Just disconnect it at the fuel filter and siphon it from there.

- Re fuel pump brand: not sure what you use but personally I'd stick to Bosch. It is not that expensive, about $150 for the fuel pump which should lasts some 150K miles, as long as you don't run the fuel tank empty over the next 10 years!

[dearborn]

Having same problem with 2000 V70XC; siphon hose, (tried different size hoses, down to about 1/4in), will not go past an obstruction about 2-3 feet down. Pump dead, of course it quit just after gas stop. Tried using suction pump at pressure relief valve on fuel rail, will only suck out about 8oz. Dead pump will not supply fuel. Will try tank access method first by removing RH trailing arm, etc, before cutting floor. Just hope I don't blow up the joint working in pool of spilled gasoline!! Idiot engineer/designer who dreamed up and signed off on this mess should be cursed forever. "I fart in your general direction!"= Monty Python, Holy Grail

[holler1]

The return line goes to the other side of tank and is used as the driving fuel for the ejector pump that delivers left side fuel to the cup on right side. It won't work for siphoning.

Sorry, misunderstanding here. My suggestion was to connect a rubber hose to the return line fitting on the pump assembly. If the return line doesn't sit low enough in the tank, siphoning through the pressure line on the pump could work as well, if in fact it's connected properly. If it's disconnected as you suspect, then that option's out.

I was just looking at the diagram of the AWD tank assembly. It looks to me as if the line that moves fuel from the ejector pump (on the driver's side of the tank) back to the main pump side comes from a point low in the tank on the ejector side and could be a siphon point. One could connect to this line by disconnecting it at the pump side and putting a hose on the pipe, or connect to it at the ejector side by disconnecting it there and putting a hose on the fitting coming from the ejector. This is not the line that returns fuel from up front, but the line that runs across between the ejector pump and the main pump. Having said that, I have not done that myself. I think this is the line that renns meant.

I was looking at the diagram to try to locate the thing in the fuel filler hose that blocks a siphon hose, but could not find it. I suppose as a last resort you could take the filler hose loose where it connects to the tank and run a hose into the tank from there, but this area is pretty hard to get at. Also, it's possible the tank may have some kind of filter right at the filler entry point. From my siphoning tries, the blocking point is about 18" or so down in the filler pipe. It sure would be useful to many of us if someone could identify the blocking point, but I can't do it from the diagrams I have seen.

[holler1]

Apologies for double post. I can't see how to delete it.