Gas/Fuel vapors/fumes visible from gas door (1 Viewer)

[4gotalot]

There is a vent that runs up next to the fill pipe and exits around the gas cap (well hidden) but not sealed by the filler cap. This is were I have found the large volume of fuel vapors venting from.

I have not removed the fuel cap when there is mass amounts of fuel vapor venting and creating some real neat shadows on the side of the white fender panel. When my rig smells like gas at the filler door, I do not open the gas cap. Unless I am refueling.

 

[bloc]

There is a vent that runs up next to the fill pipe and exits around the gas cap (well hidden) but not sealed by the filler cap. This is were I have found the large volume of fuel vapors venting from.

I have not removed the fuel cap when there is mass amounts of fuel vapor venting and creating some real neat shadows on the side of the white fender panel. When my rig smells like gas at the filler door, I do not open the gas cap. Unless I am refueling.

Where does that vent come from? The CC? It clearly isn't from the main tank volume or there would be no point to the fill cap having control of vacuum and pressure as it does.

 

[OnGrid200]

Any idea if the diesel fuel line coolers can be adapted?

That would be convenient

 

[bloc]

Any idea if the diesel fuel line coolers can be adapted?
View attachment 3381783


That would be convenient

Not easily. I'm not totally sure but the diagrams suggest it mounts in the V of the engine, where we don't have easy room, and those use engine coolant which would be higher temps than we need to run.

Might be better to try and find a fluid/fluid cooler that has simple flat mounting on one side that we can try to stick on the frame, and lines pointing out another side that can easily be adapted to the lines along that frame, with new water/coolant lines along the frame to the front for the pump and heat exchanger.

 

[FerrisBueller]

Where does that vent come from? The CC? It clearly isn't from the main tank volume or there would be no point to the fill cap having control of vacuum and pressure as it does.

Yes, it comes from the CC.

 

[FerrisBueller]

I've started collecting some items...

 

[bloc]

I've started collecting some items...

View attachment 3616624

Very nice.

And I haven't even been able to get trail temperatures from the thermocouples I placed last summer.

 

[TheGrrrrr]

I've started collecting some items...

View attachment 3616624

I removed my budbuilt fuel skid in hopes the OEM skid traps less heat. It must. The budbuilt didn't have a mark on it from wheeling so I'm not feeling less protected if after all the wheeling I did, it never got hit. Now the 80 gets the tough stuff and the 200 gets the long trips and camping. If I were to do The Maze again, it would be in the 200 and so will LCDC of course, so this is still very relevant even if my protection needs underneath are less extreme.

So now I have a whole new charcoal canister and am back to original fuel tank skid. I'll see how it goes over the next month or so while temps move into the triple digits. Next step will be drilling out 1" holes in the budbuilt skid in the area of the cats to give them some ventilation. If that doesn't cut it, I'll be following in your footsteps by end of August.

 

[isthatalexus]

I removed my budbuilt fuel skid in hopes the OEM skid traps less heat. It must. The budbuilt didn't have a mark on it from wheeling so I'm not feeling less protected if after all the wheeling I did, it never got hit. Now the 80 gets the tough stuff and the 200 gets the long trips and camping. If I were to do The Maze again, it would be in the 200 and so will LCDC of course, so this is still very relevant even if my protection needs underneath are less extreme.

So now I have a whole new charcoal canister and am back to original fuel tank skid. I'll see how it goes over the next month or so while temps move into the triple digits. Next step will be drilling out 1" holes in the budbuilt skid in the area of the cats to give them some ventilation. If that doesn't cut it, I'll be following in your footsteps by end of August.

Please share who does the drillig for you, if you don't DIY. I think I'll be on the Swiss standard with you, soon enough.

 

[PNGCRUISER]

I've started collecting some items...

View attachment 3616624

I like the way your thinking here, Any updates on this?

 

[FerrisBueller]

I like the way your thinking here, Any updates on this?

Not yet, it's all still sitting in the garage. I have a 5-day weekend coming up in 2 weeks, and was hoping to finally start assembling & test fitting at that point. However, I'm at the point where my radiator needs to get replaced, so I'll probably end up doing that first.

 

[PNGCRUISER]

Not yet, it's all still sitting in the garage. I have a 5-day weekend coming up in 2 weeks, and was hoping to finally start assembling & test fitting at that point. However, I'm at the point where my radiator needs to get replaced, so I'll probably end up doing that first.

Gotcha, seems like there is always something! Do you mind sharing your parts list you have there?
Thanks

 

[FerrisBueller]

Gotcha, seems like there is always something! Do you mind sharing your parts list you have there?
Thanks

Yeah, sure!

• Toyota Prius (2013 - 2017) inverter coolant reservoir off eBay (designed for same Toyota SLLC coolant our trucks already use) - $50
• Toyota Prius inverter coolant water pump PN 04000-32528 (for pumping the coolant to and from the mini radiator, importantly this pump is designed to run continuously and only requires a 2-pin voltage connection, also note that knock-off counterfeits are quite prevalent on Amazon) - $133
• Ford F-250 Super Duty fuel cooler assembly PN BC3Z9N103A (passive fluid coupler cooler, transfers the heat from the fuel to the coolant) - $118
• EVIL ENERGY 10 Row Oil Cooler, 10AN Stacked Plate Transmission Engine Cooler Universal Aluminium Black (this is for cooling the coolant, will be placed up in front of main stock radiator) - $58
• EVIL ENERGY 10AN Fuel Line Kit, 10AN Nylon Braided Fuel Line Hose Fitting Kit CPE 20FT Black (for routing coolant to and from mini radiator, this hose is specifically rated as compatible with coolant) - $86
• Various sizes fuel line and fittings. I mostly know how I'm going to adapt the different sized inlets and outlets, but I'm sure I'll have some changes after doing some test fits.

I'm hoping to fit the reservoir, pump, and fluid coupler assembly all behind the air filter box, since that's where the return fuel line comes away from the engine. That will keep the modifications to the stock fuel return line to a minimum. It will also have relatively short routing of the coolant lines to the mini radiator that I'll place up in front of the regular radiator.

 

[PNGCRUISER]

Yeah, sure!

• Toyota Prius (2013 - 2017) inverter coolant reservoir off eBay (designed for same Toyota SLLC coolant our trucks already use) - $50
• Toyota Prius inverter coolant water pump PN 04000-32528 (for pumping the coolant to and from the mini radiator, importantly this pump is designed to run continuously and only requires a 2-pin voltage connection, also note that knock-off counterfeits are quite prevalent on Amazon) - $133
• Ford F-250 Super Duty fuel cooler assembly PN BC3Z9N103A (passive fluid coupler cooler, transfers the heat from the fuel to the coolant) - $118
• EVIL ENERGY 10 Row Oil Cooler, 10AN Stacked Plate Transmission Engine Cooler Universal Aluminium Black (this is for cooling the coolant, will be placed up in front of main stock radiator) - $58
• EVIL ENERGY 10AN Fuel Line Kit, 10AN Nylon Braided Fuel Line Hose Fitting Kit CPE 20FT Black (for routing coolant to and from mini radiator, this hose is specifically rated as compatible with coolant) - $86
• Various sizes fuel line and fittings. I mostly know how I'm going to adapt the different sized inlets and outlets, but I'm sure I'll have some changes after doing some test fits.

I'm hoping to fit the reservoir, pump, and fluid coupler assembly all behind the air filter box, since that's where the return fuel line comes away from the engine. That will keep the modifications to the stock fuel return line to a minimum. It will also have relatively short routing of the coolant lines to the mini radiator that I'll place up in front of the regular radiator.

Sounds like a good plan, so do you have a plan for splicing into the fuel return line?

 

[FerrisBueller]

Sounds like a good plan, so do you have a plan for splicing into the fuel return line?

Yes, planning to splice AN6 or AN8 fittings into the return line so that I can disconnect them from my custom cooling setup and back into the OEM configuration easily if I ever need to.

 

[PNGCRUISER]

Yes, planning to splice AN6 or AN8 fittings into the return line so that I can disconnect them from my custom cooling setup and back into the OEM configuration easily if I ever need to.

Yes, that is what we are looking at doing as well and are looking to find the proper size quick connect adapters to do this.

 

[TheGrrrrr]

I think going back to the OEM fuel tank skid helped a little but I still got some fuel smell if not actual gurgle gurgle boiling and puking. Went ahead and had the skid drilled out around the cats. Hoping this helps to get more air flowing and reduce what I think is an oven that had been created. Not ideal, but I'm experimenting at this point.

 

[linuxgod]

I think going back to the OEM fuel tank skid helped a little but I still got some fuel smell if not actual gurgle gurgle boiling and puking. Went ahead and had the skid drilled out around the cats. Hoping this helps to get more air flowing and reduce what I think is an oven that had been created. Not ideal, but I'm experimenting at this point.

View attachment 3663496

Matt, have you pulled the skids completely and just driven like that for a bit in the heat? If it’s still gurgling with the skids removed then I’d start looking at the venting and maybe see if someone can pressure test the tank/emissions system. I know the common wisdom is that boiling fuel means the pressure relief vent is clogged, but in your case I’m starting to wonder if it’s the opposite - is your tank not maintaining pressure? Some amount of pressure helps keep the fuel from boiling by keeping the vapors in a liquid state.

 

[bloc]

I’d assume if the system isn’t holding pressure that he’d get a MIL. Basically the same thing as the fuel cap not being tight.

 

[linuxgod]

I’d assume if the system isn’t holding pressure that he’d get a MIL. Basically the same thing as the fuel cap not being tight.

Good point, I’d think so too.