LS1LOL's Eco FLVV Swap Thread
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Thread: LS1LOL's Eco FLVV Swap Thread

  1. #1
    LS1LOL is offline [OP]
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    Cool LS1LOL's Eco FLVV Swap Thread

    Hi Guys,

    I took a lot less photos than anticipated, but I got the ones that are significant, so here they are:

    Fuel pump I found on ebay for 75 shipped (I think 75, it was somewhere in the 50-75 range):



    FYI, I already removed the FLVV at this point, that is shown here:



    Removing the tank from the car (that's my ol' man in the photo):



    FLVV's side by side:



    I have yet to fill the car up to see if this actually worked (have a wedding to go to in a bit, and am driving by the station that sells no ethanol 93, so I am just going to fill up on the way and will report back), but overall it was a fairly straightforward install. The only thing that I wish I would have known up front is how that FLVV actually comes out. You only need to pop those two tabs and it pulls right out. The fuel pump I purchased with the smaller FLVV appeared like you had to remove the tabs, and the two white tabs on the top of the FLVV additionally, but that is not true. Just pop the two bottom tabs, and yank with a good amount of force.

    700 mile fill ups

    Tyler
    2013 M6 Cruze Eco

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  3. #2
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    Without searching Google, I know lazy, what is a FLVV and how does this attribute to increased fuel capacity? How hard was it to remove the tank without spilling fuel from the connected lines?
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    FLVV is the Fuel Level Vent Valve. Removing the gas tank safely requires a lift in a well ventilated area. The tank should also be mostly empty to reduce the risk of spillage and dropping the tank. However, doing so will also increase the risk of a spark caused gas explosion as there will be more gasoline vapors in the tank.
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  6. #4
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    Quote Originally Posted by obermd View Post
    FLVV is the Fuel Level Vent Valve. Removing the gas tank safely requires a lift in a well ventilated area. The tank should also be mostly empty to reduce the risk of spillage and dropping the tank. However, doing so will also increase the risk of a spark caused gas explosion as there will be more gasoline vapors in the tank.
    So going Tim Allen and using a 2000HP automatic, tubo diesel, polyinjected, supercharged lift would be a bad idea. Got it.
    obermd likes this.
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    Isn't that the Filling Limit Valve? The FLV increases the amount of fuel in the tank not the FLVV which is only the vapor vent. The tank drop isn't all that bad can be done with jack stands and a floor jack when I swaped to the Buick pump it took about 1hr

  8. #6
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    I was skimming past this and saw "LS1 eco swap thread" and got really excited... Needless to say I was disappointed.

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    Quote Originally Posted by tracepk View Post
    I was skimming past this and saw "LS1 eco swap thread" and got really excited... Needless to say I was disappointed.
    It may fit with lots of cutting...
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    Nice work! Which valve is the OE Eco valve? I assume the taller black and white one that would hang lower in the tank?
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    Quote Originally Posted by Blue Angel View Post
    Nice work! Which valve is the OE Eco valve? I assume the taller black and white one that would hang lower in the tank?
    Yes black is eco, red non eco.
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