camaroguy1984

i have a gas smell inside my 94 formula after i filled up. it didnt happen right after but a few miles driven and i started to smell it. there is no gas leaking anywhere on the ground, and you can smell it if you stand around the back of the car also.......Anyone have an idea what the problem could be?

Injuneer

Either the charcoal EVAP canister in the driver's rear fender is saturated with fuel, or the vent lines connecting the canister to the top of the fuel tank are rotted.

camaroguy1984

Thanks!

camaroguy1984

So i guess i just need to replace it?

Counted Out

Look in this forum for a similar post, it could be a few different things. You need to make sure it's the right one first.

Craddock

Has the pump ever been replaced? I had a shop replace mine when I first got my first Camaro, and they messed up and ruined it. My car smelled like gas all the time. When I changed it on my current car myself, I cut the hole in the hatch and don't smell it.

Could be they didn't seal it correctly on the top when they replaced the pump.

camaroguy1984

well i dont know if it was replaced before i got it. i have had it for almost a year now, and have never run into this problem until today.... What do you mean by you cut a hole in the hatch?

camaroguy1984

oh and also when i remove the gas cap i get alot of air that is released

Injuneer

The system is maintained under a slight pressure by the EVAP vent system. That's why you get vapor release when you open the fill pipe.

There are several possible source of the problem you are having. I mentioned a couple. You have to poke around and figure out which of the suggested sources is the actual problem. Its difficult to check the hoses and pump because they are located on top of the fuel tank, pressed up against the sheet metal that forms the package shelf behind the rear seat back. To access the tank, you have two choices - 1) drop the tank, which involves moving the rear axle, pulling exhaust, etc., or 2) cutting a access hole ("hatch") in the sheet metal.

Here's one site that shows the "hatch" solution:

http://www.cardomain.com/ride/348183/9

Before you go cutting up the car, get the back end up on SECURE jack stands, and start sniffing around in the areas of the EVAP canister, fill pipe, vent hoses and tank.

camaroguy1984

ok awesome thanks for the info oh and nice formula by the way.