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F-Body Fuel Lines

This is a discussion on F-Body Fuel Lines within the General Help forums, part of the LSx Technical Help Section category; What is the purpose of the fuel line that connects to the Intake Manifold opposite the PCV...it is the second ...

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    Sold: LS1 '85 El Camino ls1camino's Avatar
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    F-Body Fuel Lines

    What is the purpose of the fuel line that connects to the Intake Manifold opposite the PCV...it is the second one that does not connect to the Fuel Rails.

    Is there any significant point to it? or can it be removed if you install an aftermarket fuel system (Double Pumper Fuel Pump, new lines and rails)?

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    This thing:


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    Looks like a vapor line.

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    Quote Originally Posted by ls1camino View Post
    This thing:

    Click for full size
    That's the line running to the EVAP purge canister (I know this because I just had to replace my broken canister due to a p0440 code.) I'm not really sure what it's purpose is though...try gearchatter.com.

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    Thanks for the responses...I was hoping Sarge would make an appearance and shed some light on whether or not it is required and if it can be removed later...

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    Senior Member TransAm11973's Avatar
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    i believe that you need it, if you decide to remove it , i think you will have to add some other vapor mechanism for the gas tank. I believe it thats the vapors from the fuel that are released into the tank and routes them through the canister to your intake manifold to be circulated through the engine. I believe it circulated them through the engine inorder to be cleaner for the environment this way its burned, then cycled through your "cats" hahah if you have em. I would think that you could remove it but you would have to still use some sort of venting system and I would assume that you would throw a code so that would have to be deleted.......i could be wrong but thats my 2 cents

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    Senior Member 01ws6er's Avatar
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    Quote Originally Posted by TransAm11973 View Post
    i believe that you need it, if you decide to remove it , i think you will have to add some other vapor mechanism for the gas tank. I believe it thats the vapors from the fuel that are released into the tank and routes them through the canister to your intake manifold to be circulated through the engine. I believe it circulated them through the engine inorder to be cleaner for the environment this way its burned, then cycled through your "cats" hahah if you have em. I would think that you could remove it but you would have to still use some sort of venting system and I would assume that you would throw a code so that would have to be deleted.......i could be wrong but thats my 2 cents
    I think you're right...Mine was broken and I was throwing a code...have a little over 100 mies on her and have gone through a few drive cycles for the OBDII tests, so I hope I pass inspection tomorrow!!! :fingers crossed:

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