Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
@guardcompany company, that’s good news! Glad to hear it. Do you think there was any one specific change that mattered most? Guessing the new radiator probably played a big part.
Just to finish off my heat shield/exhaust saga, the Borla muffler is significantly smaller than stock. There is a lot more room between the muffler and the gas tank now. I’m not sure how much that source of heat contributes to the problem, but it’s gotta help a little, I think.
View attachment 2686558
That's great! Really good info. Thanks for recaping it.I think the fan clutch helped the most. But it's a mixture of things. If your cooling system is 100% maintained/refreshed and you can keep the gas temperature down its a winning combo.
I did my fan clutch, DIY heat shield, wrapped fuel lines and fuel pump all at the same time and it fixed it. Which single was one it? I don't know. But I had already done the radiator, o2 sensors and aftermarket smaller muffler before that and I noticed the problem was better but not completely fixed.
Bottom line was my cooling system wasn't working 100%. I was tracking my engine temp and the engine was getting too hot on those hot slow summer trails then add in Toyota's design of running fuel lines next to the cats and you have a failure point and the EVAP system can't keep up.
My EVAP system still is working and wasn't too abused by this issue. I do have a box of $600 worth of VSVs, hoses and CC in my garage I bought but after the issue was fixed I lost motivation to do. I need to get on that soon.
That's great! Really good info. Thanks for recaping it.
I suspect my cooling system isn't as cool as it could be. I've always done the factory maintenance, but it might be time for a new radiator and fan clutch.
I'm curious about the fuel pump. How does that help with the temperatures? Does it make the engine run lean as it ages and therefore hotter?
I have no idea if it helps with the over heating, but for the low price of a new Denso pump it was cheap insurance that it's less likely to fail on me. I still have a cheap-o in the spares box in case, but I'd rather not have to change it out in the dark. In the snow. Uphill both ways.The theory is as the pump ages it becomes less efficient and works harder. I did it half as a general preventative maintenance and half to see if it was related to this issue. I'm sure someone here can chime that has a lot more knowledge on that.
Eh... I had the boiling issue a few months after installing a new fuel pump in my 99.That's great! Really good info. Thanks for recaping it.
I suspect my cooling system isn't as cool as it could be. I've always done the factory maintenance, but it might be time for a new radiator and fan clutch.
I'm curious about the fuel pump. How does that help with the temperatures? Does it make the engine run lean as it ages and therefore hotter?
That does seem like the easy ticket. However, I live on the arrow in the map below. It's not a realistic option for me.guys, I have tried a few of these things, non-ethanol gas was the trick........
Yep. Non ethanol gas worked even after I put in a new radiator, fuel pump, fuel filter, gas cap, evap canister, and checked for leaks.guys, I have tried a few of these things, non-ethanol gas was the trick........
guys, I have tried a few of these things, non-ethanol gas was the trick........
Yep. So many variables who really knows what the trick is…I wish that was my trick, I saw a little less boiling with non-ethanol but it still happened. I remember getting gas in Lake City and doing Alpine Loop back and still smelling fuel, I was bummed. Last year I ran all the trails in the area in hotter weather with California sh*tty ethanol gas with zero issues.
What's your fuel temperature?Yep. Non ethanol gas worked even after I put in a new radiator, fuel pump, fuel filter, gas cap, evap canister, and checked for leaks.
Rephrase => I replaced all those things and was still getting vapor lock. Now when it gets super hot in Vegas or I head to Colorado to altitude I have been using non-ethanol gas…since I have been doing non-E gas I’ve that last three years never had vapor lock. To answer your question though I don’t have the capability to measure my fuel temp.What's your fuel temperature?
Has anyone seen a 100 series charcoal canister fail and allow the charcoal to clog up the evap lines? I've seen other vehicle owners fight this problem on cars after the evap lines become clogged with charcoal from a failed canister. They replace the canister, the purge valve, gas cap, all of the known culprits without finding the lines are clogged with charcoal.
A few years ago I would spot a nice-looking car at the junk year and try to guess the reason for it being scrapped. Seven out of 10 times I could see where a clogged evap system sent the car to an early grave.
View attachment 2687460