Gas fumes coming from behind back tire below fuel tank door?

MOVE THE CAR FAR AWAY FROM HOUSES AND KIDS AND PEOPLE NOW. PRONTO

NO YEAR CAR TOLD OR COUNTRY . 2.7L OKAY.
WRECKING THE CANISTER LIKE THAT IS SUPER BAD.
THAT CAUSES HUGE GAS TANK PRESSURES FOR GO CRAZY HIGH. THE CAR IS DANGER TO YOU AND ALL AROUND YOU
NOW. IT WILL CATCH FIRE, AND IT WILL NOT BE A HAPPY DAY.
GLAD I AM FAR FROM YOU.

RAW LIQUID FUEL COMES TO THE CANISTER ONLY 2 WAYS.
THE BAD BOY THAT DID THAT ACT
OR OVERFILLING THE GAS TANK.
OR BOTH, I BET BOTH. (OR HOSE ON THE TANK BOYBOY WRECKED THOSE TOO)
FIND A REAL SHOP TO FIX ALL THAT OR HAVE BAD FIRE.
IF SOMEONE DRIPS A CIG NEAR YOUR CAR IT WILL NOT BE FUN. EVER.
EVAP 101
Nomally the tank is never full, ever. by design at the filler the station pump clicks off at full , do not overfill any cars tank.
at that moment the tank has and air space on top, and only fumes are there, not gas.
these fumes are sent to a check valve (evap) to the canistor
and it collects only fumes never ever gas,raw, and if did the raw gas wrecks the canister carbon brick inside.
when you run the engine the engine vacuum sucks the fumes out of Mr. canister and it is now fresh and clean, and repeats.

your car is now HACKED and unSAFE.
find a shop to UN HACK it.

Only two are fuel lines, the main feed to the engine and the return line from the engine to the tank. One other gas tank line will be the EVAP line for sending gas tank fumes from the charcoal canister to the engine's intake manifold.
I think the other lines would be your brake lines to the rear wheels.

YouTube has many videos on repairing rusted fuel lines. Most people use the lines made of plastic in their repairs-takes special fittings though. These plastic lines have become very common now. In fact my '92 LeSabre has mostly plastic lines.

Check the evap system /canister behind the drivers rear tire,the brackets rust out and pull lines off.also check front purge valve on top of the gas tank,reach up on top of tank by end of back door and see if its wet.Im assuming you checked for leaky steel lines.also check the fuel pressure regulator on the engine.My 2 95 blazers have had these problems over the years

You may have leakings fuel line on top of gas tank when filling up or line is leaking where they connect to fuel filter under body maybe behind rear wheel wells , or may have a leaking furl injector or even your carbon gas canister filtr need chaging or ovver filling can send fuel up to that canister which recirculates gas fumes back to fuel system check your gas cap maybe leaking or when gas attended over filling it runs down into drain tube

Joe

hi u need 2 check fuel lines to&from tank also check gasket where pump&fuel gauge sender unit fits into the tank would get on to it fairly quick as fumes can knock u out not to mension the fire risk good luck

Hello grandpa_art_,

Yes, this id done by removing the rear compartment floor trim.

Then remover the bolts to the access cover and remove the cover. See image below.



There quick connect fuel line fittings( Red) that will need to be disconnected and electrical connectors(Blue). See image below.



Be aware the fuel module is spring loaded so when you remove the retaining the unit will spring up.

Then remove the retaining ring and the module.

Use extreme caution as you will be opening the gas tank and will have gas fumes and gasoline. Fire danger is very real.

I hope this helps.

Regards,

Jerry

Sounds like you got the evap canister box. Only used as a storage for gas fumes so they dont escape into atmosphere. Under correct conditions a switch will activate allowing those fumes to travel to the engine where it is burned. Try to locate and plug all loose lines from the box to contain fumes. After that you should be fine to continue your trip. The light will stay on until that component is replaced.

in the EVAP system
it is possible that the fuel has got into the cannister and you are smelling the fumes from the vent

The evap system ( fuel vapor recovery system ) , if there is a leaky hose, can let fumes out that can be detected in the cab. If you "top off" the fuel at the pump you can spill fuel into the charcoal canister meant for fuel vapors only. the vapor recovery system is behind the left rear tire.

Usually if there is a hose leak a check engine light will come on.

If you TOP OFF, don't. If you don't, good. Hope this helps.

I had a similar problem with my 1999 S80. Give this a try. You don't need any mechanical experience. At no point will you come into contact with any gasoline. This is a five minute fix if it's what I think it is.
Background: when you gas up your car, it goes down a tube to the gas tank. There is a vent on that tube to let off gas fume pressure that can build up in the tank. If the vent gets clogged pressure builds up in the tank. Modern gas pumps shut off when that pressure comes back up the tube from the tank. I think if you clean out the vent with a Q-tip you'll solve your problem. At least, it worked for me.

1. Get a flashlight and some Q-tips (I suppose anything long and pokey will do).
   
   
2. Go to where you put the gas in (you don't need to open to door or take the gas cap off).
   
   
3. Crawl under the car behind the tire and look up with the flashlight to about where you'd put the gas in. You should see something like the picture below (taken from my 1999 S80). Note that at the end of the red arrow, you can look up inside the tube a bit? When I was having this problem I could only see what looked like white cotton inside the tube. It turns out it was an old spider's nest. The spider was long dead from the gas fumes, but his nest made it impossible for me to fill up my car!
   
   
4. 
   (fig. 1 - a vent for the tube that leads to your gas tank)
   
   
5. Place a Q-tip in the hole indicated by the red arrow. Swirl it around a bit. You shouldn't have to jam it or be very forceful. The Q-tip should remove any blockage.
   
   I suppose it's possible that when you open the blockage some gas fumes will vent out, so don't be smoking while you do this :) Now that I've said this, to be super-duper safe why not do this outside away from any chance of open flame.
   
   
6. Go gas up your tank and see if it works. It did for me.
   
   

Good luck!