Raw fuel smell in the garage - found source, but what is it?

Since the B has been allowed in the garage, there has been a raw fuel smell every night. By morning you can't really smell it, or if it sits for a couple of days in the garage there isn't a smell.

Tilted the bed (thanks, Cusser!) to access the fill pipes, expecting them to be cracked/damaged. The smaller vent hose isn't in the greatest shape, but no breaks. Main fill hose is good. Neither were wet.

On top of the tank there is a white plastic fitting pushed in that's connected to a hose that was wet and loose. Pic below...





Also, mounted by the frame is what appears to be some sort of solenoid:





What are these? Which lines can be removed and plugged? I'm running a Weber with a line from carb to vapor canister, and a line from the vapor canister to the fuel tank.

Any help is greatly appreciated!

OK, got the white fitting out -- it's the rollover valve. The rubber grommet has shrunk and it doesn't fit tight anymore. So I'll need to find that grommet. I'm pretty sure that's where the smell is coming from...

How about the solenoid valve?

Looks from the photos that shuld take care of the smell/leak.

I've had gasoline smell with mine three times in the 17.5 years I've had it. First time was (of course) same week I had a leaky fuel cap O-ring on my VW convertible that shared the garage, so once I fixed one, was confounded that the smell still remained !!!

So those first two gas smells with the B2200 were because of leaking mechanical fuel pumps, and both times were intermittents. The third time was a leaky fuel pressure regulator that MT guys said that would work wonders with Weber on manual trnamission B2200, but never noticed any difference. So the FPR is now in the trash.

Yep, Steve, pretty amazed how those original Mazda fuel lines have held up over the years. My two original heater hoses and the two rearmost small bypass hoses also looked darn good, but decided to replace them all last October (small ones with Mazda hoses) when I had the engine "open".

Well, I replaced the vent line to the cap since it was starting to crack, and was original from 1988 (as are the other lines under there). Fuel and vapor lines appear to be in good shape, no cracks, no hard spots, no super soft spots, etc.

For now I put some sealant on the grommet and rollover valve, we will see if that helps. Once I get a few more parts on my list to order from Mazda I'll have plenty to tinker with... I want to rebuild the rear suspension after reading about the improvements in cornering from Jenko.

Steve, check your vent hose for the filler neck......it's the smaller of the two (about 5/8" hose) and where it connects to the gas tank. I've replaced this twice now on 2 different trucks I have owned, because it would leak gas there when the tank was anywhere near filled up.
One time I was filling the tank at the gas station and started hearing gas pouring out as I was getting near filled, bent down to look under the truck there and saw gas pouring out! I figured the main fill rubber hose where it attaches to the tank must have had a hole or cracked........drove it home and pulled the bed and realized the smaller vent hose was dry rotted where it hooked to the gas tank.......yeah, I got pictures!

Here you can see the 2 hoses that hook to the fill neck and the gas tank.





And here you can see how cracked that smaller hose was.....especially when I squeezed it!



I found some hose at the parts house that was for fuel......I think it was just over 1/2" ID if I recall correctly but it's been a while ago!

Thanks for the pics, earl - I replaced that hose. It wasn't cracked yet, but was getting to be in fairly poor shape. The main fill hose is still in good condition.