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Thread: Slow fuel leak?

  1. #11
    Jr. Apprentice
    Join Date
    Aug 2009
    Location
    Buffalo, NY
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    29

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    Quote Originally Posted by Jimmiee View Post
    This is your problem. You have a leak not a blockage. The leak can be impossible to see because what's leaking is fumes or hydrocarbons as it's called.

    If you do a search here on this forum you can find some info on cleaning the canister vent solenoid rather than replacing it.
    It sounds reasonable that the EVAP issue would cause a loss of fuel pressure when the car is sitting?
    2005 Tahoe Z71

  2. #12

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    Quote Originally Posted by ejj View Post
    It sounds reasonable that the EVAP issue would cause a loss of fuel pressure when the car is sitting?
    There is usually pressure in the tank most of the time. The EVAP system works even when the vehicle is turned off and parked.
    Jim

    2004 SILVERADO 2500HD LS
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    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #13

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    i see alot of that code w/ bad gas caps, and evap perge soleniod stuck open

    you really need the gm scanner to read the pressure parameters to properly diag it
    GM TECH

    05 silverado shortbed

  4. #14

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    I, too, get a fuel smell after filling up. I have searched all over trying to find a leak, but I think I've narrowed it down to the gas cap.

    Yesterday, I found a fuel trail down the inside of the fender, right below the fuel fill. I rolled the cap gasket around and cranked it down hard. The smell was gone this morning.

    Check the cap, and do as Loggerhead Mike says and check the codes with the GM scanner.

    Good luck,

    1999 Chevy K2500 Suburban 350
    K&N, reworked cai, Thrush cat-backs
    Vinyl, cranks, floor shift, and rear air!

  5. #15
    Jr. Apprentice
    Join Date
    Aug 2009
    Location
    Buffalo, NY
    Posts
    29

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    All -

    I've had the EVAP problem addressed, as the dealer replaced the vent solenoid (above the tank on my truck). However, the fuel smell and low pressure in the mornings haven't gone away completely. Its better, but the truck still smells like gas outside it after driving.

    Any ideas?

    Thanks!

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