is your fuel pump secured all the way? theres a plate that goes over the fuel pump in the trunk. is it closed all the way? what about the plate right above the fuel pump, is it closed all the way? do you suspect a leaky injector caused by a faulty o-ring?

 

that very top plate that covers the fuel pump and the connector? that is screwed down tightly, there is one screw missing under that plate/cover, and im not sure how to check the injector

 

Is there a huge rust hole in the back,(like actually next to the muff on the inner fender) right by the muffler and maybe yer not burnin fuel for some reason?

Do you mean, when you top off your gas, or when you fill it til the thing clicks, and put it away? Cause when I top mine off it reeks inside.

Any other bad exhaust leaks gettin in thru holes or somethin?

 

i havnt found any rust, and this car have been in cali pretty much its whole life...so i guess prob there would not be any

yeah next day i bought the car, i filled it up all the way to the top, until it clicks, IIRC its like 14.9 gallon or something, then u see gas leaking out of the tank, dripping on the ground, mainly on the tow hook side(not the exhaust side)

 

hrm.... that doesnt sound right. you might want to inspect the gas tank.

 

but if i dont fill it all the way full, its fine...

so ur suggesting me to drop the fuel tank out and see whats wrong?

 

I always fill it up and don't see any leaking... inspect the tank and other related pipes. It may not be rust but something else...

 

did you remove your aiv valve?

 

Sounds like one of your rollover check valves is leaking. There are two check valves on top of the tank to prevent leakage in the event of a rollover, sounds like one of them is leaking. That's why you don't leak gas if you stop short of the top of the tank. As for the air pressure when you open the gas cap, that is normal on a fuel injected car. There are valves that will add and vent air to and from the gas tank as the level drops to maintain proper air pressure. They are the evaporative emissions vent/purge valve and pressure valve. That's why your check engine light can come on if you don't tighten the gas cap, it indicates a fault with one of these valves because air will leak past the cap.

 

I have the same exact problem as you. I smell gas occasionally in the cabin the if i fill it up all the way, i noticed one time it leak on my exaust.

 

if you ever replaced your fuel pump and took the cover to get to it.. there was an O-style gasket.. did you put that back in? i didnt put mine back in because it wouldnt fit so i was like eh whatever itll be fine.. how wrong i was, whenever i went over 1/2 of gas it spilled everywhere!!!!!!

so make sure the gasket is there

 

A friend of mine had this problem with his 240, it turned out that there was a hole in the top of his gas tank the let the fumes go directly into the car...Whenever he filled it up, it would leak a lil bit...I would suggest pulling the tank out and checking it for holes...

 

i would check the gasket first, it seems it would be a PITA to pull out the tank and have it perfectly fine....

 

i guess ill check that o ring over the weekend

is it the o ring under that cap?


btw i stole this pic....

 

yes its under that cap... what i did was make my own gasket using rubber and silicone sealer lol.. kind of like that i do with everything on this car =/

from how it looks in that picture, that ugy doesnt seem to have his o-ring gasket

 

i guess i dont have that gasket there huh

btw i found couple loose screws or nuts on the gas tank too...

 

you used rubber and silicon sealer ? for a gas tank ? gas eats right through that rubber

 

have you figured out this problem yet? if not, i would suspect leaky injectors. i also recommend looking at all the fuel lines under the car and see if there is any leakage of some sort. hope you find your problem.

 

not yet, that stupid floor jack i bought cant jack the car high enough to put the stands under, and i dont want to get under the car without the stands

i dont see any gasket, around that pump, thats how i got the car, never opened that part up until this week

 

This could be a wild try but, when my catalytic converter went all I smelled was gas in the cabin. Could be a gasket or the converter is hollowed out.

 

hollowed out as in rusted out?
if so, i highly doubt theres any rust on my car

Cali FTW...lol

 

no hollowed out as in the catalyst inside the converter has disintegrated from whatever...overheating, burning oil, etc. Again I doubt thats the issue but it just happened to be with mine.