Question about 1998 Jaguar XJ8L

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I got water in my XJ8 fuel tank. How do I drain the gas?

The drain at the fuel cap filler reservoir got plugged. It's just enough water so it won't run for more than 30 seconds. I have put three cans of HEET to dissolve the water plus added 10 gallons of high octane gas and 2 bottles of injector cleaner to no avail.

I cannot get a siphon hose into the tank due to some obstruction and simply want to disconnect the fuel line and drain the tank.

Any diagrams or suggestions would be appreciated.

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  • 2 more comments 
  • snicholso357 Jan 13, 2009

    Tell me about the obstruction. I cannot get gas to go in but VERY slowly.



  • nascarzissle Mar 04, 2009

    I beleive I got water in the gas tank then ran it low on fuel the car(1987 jaguar xj6) started to run real slugish I did put about 10 gallons in it before it ran out then drove for around 1 hour on the highway. The next day I went to go somewhere and it started out ok then after the first stop it started running slugish again so I'm thinking fuel filter or something along that line. I called my local parts dealer and they say there is no filter listed just a screen on the fuel pump? and I have no idea if there is one or not

  • tudla Apr 15, 2009

    This morning (4-15-09) after a good night rain, my 91 XJ6 would not accelerate. I got it back home and grabbed another car to make t to work. My husband asked me if water could have gotten in the tank. That reminded me that the last time I got gas the cap was underwater and I had to sop it out before I fueled. Apparently the drainage around the cap is clogged. Where is the drain located so I can take care of this problem?

  • Anonymous May 15, 2009

    yea best thing is to drop the tank im currently doing the same thing

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  • 133 Answers

Hi j the tank would have to be removed as there is a filter on the pump and dirt will be in there two D

Posted on Jan 24, 2009

  • elizebethdav Sep 26, 2010

    thats what i thought what a **** and by the way mate that was a bit of coincedence my name begins with j thanks for the comment nice one

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Posted on Jan 02, 2017

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this forum is for usa cars, is car USA car?
the tanks just dont like siphoning. (check valve)
the FSM covers this , in the fuel section under bad pump.
1998 to 2006, ill guess, 06

i have the FSM and does not cover. bad fuel, no drain plug.

it shows how to get fuel lower, in filler neck
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