I have an 96 Dodge Intrepid 3.3L. I have a fuel smell in my car when I turn the heater on. It smells like I have an open gas can in the car. I have to roll down the windows to let the fumes out. It only happens when its been sitting for a while; ie. overnight. My father-in-law said something about a charcoal filter that may need to be changed. Please help, its getting colder and I need the heat in my car but I don't want to get sick from the fumes.
I had this problem. The fuel pressure regulator was leaking gas. $50-$100 for a replacement. It is not safe to drive around if you have a gas leak - could start a fire. Look under the hood to find where the gas is leaking, should be easy to see/smell when the car is running. If you cannot find it, take it in to a shop right away.
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When the heater is turned on, it is drawing in air from the cowl at the bottom of the windshield outside the car. If your smelling gas when you turn it on, it would suggest to me that there may be a fuel leak under the hood. A lot of Honda's have the fuel filter under the hood against the firewall. Open the hood, and see if the gas smell is any stronger, or any gas smell at all for that matter. I would strongly recommend getting the car checked as soon as possible, if you can find the source of the smell yourself.
Your Car MUST be Completely INSPECTED for FUEL LEAKS as this IS OBVIOUSLY DANGEROUS and a Fuel Leak Can RESULT in a Catastrophe, as for the ROUGH Running the Fuel Smell Can and Likely is RELATED to this FUEL SMELL you have. ALSO if your CEL (Check Engine Light) is on this will Lead you to the Most Probable Cause of your Problem.
There is a recall on the fuel rail for your vehicle. In my case I had 2 leaking fuel injectors. The intake manifold needs to come off, but it pretty easy to change the o-rings on the leaking injectors. Costs is about $25 for the new o-ring and about 2 hours of your time.
On a 96 model it's very likely the fuel supply hose could be seeping at the crimp area. You could turn key to run position and check around the hoses that come up along the right inner fender area. It would only take a few drop to be a pretty strong smell.
If seems more fro rear of car then a fuel pump seal may be the cause and would likely need the tank dropped to investigate further.