Gas / Exhaust Smell / High Altitude ? (1 Viewer)

[SDCORT]

Hello- 2000 Land Cruiser. Took it on a camping trip and after going over a 12,000 FT pass and then up another forest road, started smelling a very noticeable gas / exhaust smell. We pulled into our site and after turning off the car, it continued for at least another 15 minutes, could smell in 20 feet away as we set up our tent. I lifted up the hood and heard a crackling / sizzling sound coming from the right side of engine. See photo . Pretty sure it was this exact spot. No clue where to start, if the sound I heard is related, etc etc - ANY help would be much appreciated.

 

[Trunk Monkey]

Lots of threads on fuel tank pressure and altitude, some of them nice and scary including trucks burning to the ground. Here's a thread just a few down from yours with some info.

Gas tank building excessive pressure & fuel smell. Dangerous for sure! Why does this happen?

DANGEROUS GAS PRESSURE BUILD UP IN GAS TANK! Why? What's going on? How can we fix this? Edited 12/29/23: It is a unban myth, all Land Cruisers boil fuel. They do not! Edited 7/4/20: What I found in every case of "fuel boiling" I've worked on. Was, engine overheating or running hot. :hmm: That...

forum.ih8mud.com

 

[ramangain]

Buy 6-8 of these and post them around your rig in a 10' radius. Only YOU can prevent forest fires (by keeping folks from lighting up near your rig at altitude in heat). I would suggest replacing 'MEDIUM' with 'EXTREME'

 

[VtaTom]

There are threads about fuel smell at altitude on hot days and rough trail. Some of them involve fire. The charcoal evap canister gets overwhelmed and pressure builds and escapes. Especially if it's old. The solutions include avoiding a top off before going on a rough trail at altitude (hit the trail with 3/4 tank max) and some say ethanol fuel makes it worse due to more evaporation. Opening your gas cap is NOT advised (remember fuel fumes sink and there are hot parts like brakes down below.) The pressure will diminish once you stop for a while or hit smooth road.

 

[SDCORT]

There are threads about fuel smell at altitude on hot days and rough trail. Some of them involve fire. The charcoal evap canister gets overwhelmed and pressure builds and escapes. Especially if it's old. The solutions include avoiding a top off before going on a rough trail at altitude (hit the trail with 3/4 tank max) and some say ethanol fuel makes it worse due to more evaporation. Opening your gas cap is NOT advised (remember fuel fumes sink and there are hot parts like brakes down below.) The pressure will diminish once you stop for a while or hit smooth road.

Thank you for this reply. Why is it that this occurs on this specific vehicle and not all vehicles ? Are there any upgrades / repairs that can be made to fix it , other than getting off rough trail ?