Gas smell

  • 1 POST
  • 3.8L
  • 6 CYL
  • 160,000 MILES

I can smell gas inside my car there are no leaks and the fuel pump was replaced. What can It be that's causing this problem?

Do you
have the same problem?
Monday, March 14th, 2016 AT 1:38 PM

1 Reply

  • 29,768 POSTS

Kind of hard to see over a computer, but if the fuel pump was replaced recently, that's the place to start looking. The assembly may have not sealed properly to the tank. In that case you'll smell gas, but you won't see wetness unless the pump mounts to the side of the tank. Most mount on top.

If you smell it more with the heater fan running, check on the injectors to see if an o-ring is leaking. The gas might evaporate real fast so there won't be any running onto the engine. Look for a small hint of wetness where the fuel rail attaches to the injectors.

Check the rubber hose where the fuel line on the body attaches to the fuel rail on the engine. Look for a dry-rotted hose and loose hose clamps. Given the age of the car, if you live in a state like mine where they throw a pound of salt on an ounce of snow, check underneath for signs of a leaking metal fuel line. When that starts, the gas can evaporate fast enough to be smelled, but slow enough to to not leak onto the ground.

You can get a hint too, by observing if the gas smell is still there after the engine has been off for a few minutes. If you can, that suggests the pressurized fuel supply system is where the leak is occurring. The gas tank and fuel supply system are monitored for leaks, so you should see the Check Engine light and have a diagnostic fault code related to that.

Don't overlook the fact that exhaust can smell like gas. A leak in the exhaust system can allow fumes to enter the passenger compartment where you will smell it.

Was this
Monday, March 14th, 2016 AT 1:56 PM

Please login or register to post a reply.

Recommended Guides