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1996 GMC Sonoma Question: gas smell

 

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Fast Freddy, 4.3L V6, Coplay, PA, October 28, 2010, 11:53
 Rookie

My truck smells like gas pretty bad but doesn't seem to be losing an acessive ammount and there is no visible leaks. Any suggestions?

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  • Answer #1

    October 29, 2010, 14:37
     Master

    Check for leakage around the top of the fuel tank, look for staining around fuel line fittings and hoses including the gas filler tubing and vent line to the filler. I assume you're talking about when the vehicle is sittingstill not running. If you mean when it's running, check for the engine warming up properly and check for misfire. Also look for fuel leakage arouund the intake manifold and injectors.

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  • Answer #2

    October 29, 2010, 14:43
     Master

    Is your check engine light on? Your 1996 GMC Sonoma should set an EVAP code and turn the check engine light on if there is a fuel leak as severe as you describe. Without any special test equipment you will need to visually check to see if you can isolate the cause of the leak. See if you can tell if the smell is worse in the front or the rear and then begin there. Visually inspect all the fuel system components beginning where the smell is the strongest. The fuel system components are generally pretty well exposed so have a look and see what you can find. Fuel is most likely not dripping but you may note a wet spot at the source of the smell.

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    Visitor, January 25, 2011, 10:11

    I'd Like to thank Oakman and Supebob for their input. I should have mentioned it is worst when running but I did not have any idle problems. My mechanic was baffled.

    Anyway, it turns out the floorboard joints beneath the cab wore through the fuel line. It's tight under there but a compression fitting fixed it right up and all is well! Thanks again!

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  • Answer #3

    Visitor, November 30, 2010, 01:24

    i have a 1995 GMC Jimmy and have the same problem. It is probably your spider fuel injector which is located under the exhaust manifold on the drivers side. When your injector starts to go out, your truck will run ruff and hesitate when accelerating, sometimes stall. Mine still runs but is ruff, and smells like pure gasoline. That is what is wrong with mine. -Brandon Ballasso Jax,Fla.

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