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Thread: To change Fuel filter... Disconnect the battery???

  1. #1
    Join Date
    Mar 2007
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    Liverpool UK
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    Default To change Fuel filter... Disconnect the battery???

    I ran a search for what i want to know but couldn't find it sorry (posted a few thrads this week!)

    I need to know when changing the fuel filter do you need to disconnect the battery? (Mine is located behind the rear wheel). I dont really want to disconnect it if i dont have to due to the radio being aftermarket and not having the code. However i dont want to get electrified either...

    I think i have the method for changing it down now but any hints/tricks that may make my life easier = much appreciated.
    1995 XJR: 4.0L S/charged straight 6 Auto

    What... It's not broken??? I can still fix it

  2. #2
    Join Date
    Mar 2006
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    Great Britain
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    Default

    I thought the usual advice was to unplug the fuel relay and run the engine till it cuts out (in order to minimise the pressure in the fuel hose). I think Dave M has recently posted pictures of the fuel relay in the DME box.

  3. #3
    Join Date
    Dec 2003
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    Default

    Right - unplug the fuel pump relay or fuse and run the car til it sputters out. Then, I unplug the battery. I unplug it for most things because its stupid not to. Who knows what kind of bizarre **** could turn your fuel filter change into a push-burning-car-out-of-garage routine.

  4. #4
    Join Date
    Oct 2004
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    Honolulu
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    Default I don't bother

    I just look forward to the splash of fuel in my eyes, as I pull the first hose.

    Just pull the fuel pump relay and try to start the car to release the stored pressure.

    The battery part is for the chronically paranoid delusional mechanics.


    Vee ave vays of dealing vid your kind...........

  5. #5
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    Feb 2007
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    GreenHills East-Philippines
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    Default

    just replaced mine 2times this past week.I didn't take out the battery nor the fuel pump relay.Just jacked up the car and changed it.,And oh yeah wear goggles hehehe when you first take the fuel lines out get ready to be splashed by fuel better do it while smoking then...KABOOMM

    HID 5000k low 3000k fogs
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  6. #6
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    Quote Originally Posted by Blitzkrieg Bob
    The battery part is for the chronically paranoid delusional mechanics.

    Or for people who know why batteries have vent tubes

  7. #7
    Join Date
    Jul 2006
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    Albany, NY
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    Default

    Quote Originally Posted by Jon K
    Or for people who know why batteries have vent tubes
    I thought that was an emergency roadside oxygen supply?

  8. #8
    Join Date
    Jul 2006
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    pa
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    Default

    I opened the fuel door and clamped the fuel line before I removed the old filter. When I pulled the 2nd filter out I know to tilt it with the arrow down. And I think changing 1 filter at a time will prevent some spilage. I lost a bout 2 cups of fuel on my first attempt.

  9. #9
    Join Date
    Mar 2007
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    Liverpool UK
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    Default

    Fuel filter got delayed when i got underneath and found a corroded fuel pipe leaking!

    Sorted that now thankfully: it wasn't easy but got some rubber fuel pipe and extended it over the bit of fuel line i broke off while inspecting it. Difficult when fuel is pouring out of it i can tell you but it got done.

    Feel much more confident about my car DIY'ing these days, done a few different jobs now!

    Thanks everyone. I dont think i'll bother with disconnecting the battery - less hassle than its worth i suppose.

    Will replace all the fuel lines when i get time, think thats gonna be a bi*ch!!!!
    1995 XJR: 4.0L S/charged straight 6 Auto

    What... It's not broken??? I can still fix it

  10. #10
    Join Date
    Dec 2006
    Location
    Montreal
    Posts
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    Default

    your confiedence will grow and grow with each job, it's one of the best feelings that comes with owning a car you wrench on yourself.

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