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1999 Pontiac Montana Question: Smelling gas inside car. No visible leaks

 

Question

jhil6959, 3.4L V6, Somerville, TN, June 27, 2011, 18:36
 Rookie

The fuel tank pressurizes and gas smell is strong inside car.More in hot weather. Fuel tank blows back hard when the cap is removed.

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  • Answer #1

    June 27, 2011, 18:52
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     Master

    The most likely cause of your concern is a malfunctioning evaporative emission system. This system contains the raw fuel vapors and burns them in your engine when the computer opens a valve electronically. A clogged carcoal canister may be the culprit, but a professional that understands the system needs to give it a look.

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    Visitor, June 28, 2011, 14:24

    Thanks, I changed the canister some time back but that didn't help.

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