Identifying source of Gas fumes

[squeegy]

I know gasoline powered caddies are well known for fuel vapors entering the passenger area. This often comes from the fuel tank and then enters from behind the passenger seats.

I recently did a rennovation of the fuel tank. I removed the tank and cleaned and replaced all of the hoses and clamps. I also installed a new fuel pump and a gauge sensor.

Although this greatly reduced the amount of gas vapors entering the cabin area, I still occasionally smell fuel vapors while driving.
I cannot visually detect any leaks in the engine area or around the fuel tank. I also know that pinhole fuel leaks often don't leave a puddle or detectable residue.

Any suggestions on where else I can look for fuel leaks? How else can I determine the source(s) of fuel vapors?

Any suggestions would be appreciated.

[Darth Garry]

Use a lighter, and when you find the vapors, you'll know.

Actually, don't do that. :D

Garry

[gocaddygo]

I was heading down this path shortly, but haven't started yet (Truck also isn't on the road yet so no worries there). I would be interested to see what you find, and how you found it.


(taking back dated comment that's incompatible with the new forum rankings)

[laith]

I get fumes in my truck from time to time....mostly after full throttle starts with the window and rear slider open.....I am thinking that it is due to my muffler placement and running too rich....but I also know that my tank vent lines are needing attention so that could be it too.....probably will get to it when it starts to get me lightheaded while driving.

[DieselsRcool]

I have discovered a source of engine fumes in mine. The little rubber collapsable drain thingies in each end of the rain tray. Mine were rotted and would not close up allowing the heater fan to draw air up from the engine compartment but only when going slow or stopped and with the fan on. When driving at speed the high pressure air at the bottom of the windshield overcomes the engine compartment pressure and keeps the fumes down. Also make sure the raintray seal is in place properly and also the two little rubber dams on either side of the hood.

[Dave9148]

Any other ideas on the gas fumes in the cab...? I do not see or smell any gas fumes or signs of leaking at the tank, lines, or engine bay. But when driving with the windows down, the gas fuse come rushing in...?