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doing 200 things.. boiling fuel at high elevation

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Been there! I'm still annoyed though that we just have to accept it or keep changing charcoal canisters every few years......
i have been at high elevation before but at much cooler temps and it doesn't happen. But this time it was about 100F. It was alarming, I lost about half a tank in 20 miles. I eventually stopped in flat terrain and vented the gas cap manually but it was too late.
 
i have been at high elevation before but at much cooler temps and it doesn't happen. But this time it was about 100F. It was alarming, I lost about half a tank in 20 miles. I eventually stopped in flat terrain and vented the gas cap manually but it was too late.
Just curious as to what octane you were using. I have read some research that this problem is exacerbated by fuels with a higher volatility blend. Seems that gas quality plays a factor. I've been fortunate as to not having this problem but I am heading into Colorado in a couple of weeks and will be spending quite a bit of time at 8000 feet and above elevation. I will see what happens. Last time I was there with my LC, I had no issues. Now, I have another 55,000 miles on the truck.
 
Just curious as to what octane you were using. I have read some research that this problem is exacerbated by fuels with a higher volatility blend. Seems that gas quality plays a factor. I've been fortunate as to not having this problem but I am heading into Colorado in a couple of weeks and will be spending quite a bit of time at 8000 feet and above elevation. I will see what happens. Last time I was there with my LC, I had no issues. Now, I have another 55,000 miles on the truck.
I use 87 almost exclusively but I figure i'll be in the heat and elevation, i'd treat the LC with 91 for this trip. I did use a non-tier 1 gas station as that's what was easily accessible in the more remote part of the trip. Hope you don't get any boiling on your upcoming trip.
 
I use 87 almost exclusively but I figure i'll be in the heat and elevation, i'd treat the LC with 91 for this trip. I did use a non-tier 1 gas station as that's what was easily accessible in the more remote part of the trip. Hope you don't get any boiling on your upcoming trip.
I try to use 91 exclusively when possible
 
Does it help with fuel boiling? Do you monitor your KCLV values regularly?
I cannot confirm if it helps the boiling or not yet only because I replaced the charcoal canister last fall after I boiled several times over the summer in Utah and Colorado. There are so many varying thoughts on what causes it, but for me I think I tried over filling the tank after the pump clicked too many times. I have since avoided that completely and have not seen a boil once this summer at elevation in Utah.
 
For the 100 series (I know apples and oranges) , using ethanol free gas, protecting the gas tank from the exhaust muffler/pipe and covering the gas return lines to protect from heat is usually enough to prevent the fuel from boiling over. YMMV.
 

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