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Discussion Starter #1
I am hoping that someone has some suggestions on this - I am stumped!

after driving my 1999.5 SE for either short or longer distances, a very strong fuel smell is present in the rear of the vehicle. It is bad enough that it permiates to the upstairs bedroom when I am parked in the garage.

Last week, I went to investigate, and dropped the tank, cleaned, and inspected. the side of the tank had signs of fuel running down, but not enough to cause a leak on the ground. the main fuel line was well connected, but the vapor return line to the fill tube had come detached from the tank (although I am not 100% sure the this did not happen when I was removing the tank. Also, it did not appear that this fuel was coming from the gasket around the fuel pump.

I re-assembled everything and was hopeful that it was the disconnected hose - but alas, the smell is back.

I have not yet reinspected the top of the tank, but i am wondering if something else is causing this hose to come detached - pressure build up? or maybe the carbon canister is blocked or bad?

Any thoughts or suggestions would be appreciated.
 

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My 1997 4.6 does the same.

I changed the filler cap thinking it was that but am now thinking the vacuum solenoid on the isnt working and venting fumes to the charcoal filter. One sign is the tank isn't pressurised when I take the cap off. Also noticed it's worse when the tank is low on fuel.

Haven't got round to checking it as I'm on LPG now and it isn't so bad.
 

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How is your fuel consumption? Could be the engine is running rich, with unburnt fuel coming from the exhaust when parking.
I had a similar problem with my 4.6, replaced plugs & leads and reset the adaptive values and she's fine since. Consumption also dropped from about 22 tot 17l/100km. 8)
 

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Discussion Starter #4
rayc said:
My 1997 4.6 does the same.

I changed the filler cap thinking it was that but am now thinking the vacuum solenoid on the isnt working and venting fumes to the charcoal filter. One sign is the tank isn't pressurised when I take the cap off. Also noticed it's worse when the tank is low on fuel.

Haven't got round to checking it as I'm on LPG now and it isn't so bad.
No that you mentioned it, my tank is definitely not pressurized when I unscrew the cap. I will definitely keep this post updated with anything I find.
 

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Discussion Starter #5
Escape said:
How is your fuel consumption? Could be the engine is running rich, with unburnt fuel coming from the exhaust when parking.
I had a similar problem with my 4.6, replaced plugs & leads and reset the adaptive values and she's fine since. Consumption also dropped from about 22 tot 17l/100km. 8)
no change in fuel consumption.
 

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There is a canister for fuel gases, there are some hoses to recycle the gases, i think that canister is broken somewhere, well, thats what happened to mine.

Best regards form mexico
 
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