I have a pretty constant faint smell of gasoline when operating my LX470. Everything seems to be operating fine, no CEL, nothing else out of the ordinary, just the smell.
Okay new gas cap is on and it didn't fix the problem. The smell is definitely worse when the fuel tank is fuller. Any ideas? Smell seems to coming from around the tank and not the engine bay.
I have the same issue. Tried the silicone fix around the interior rear driver's panel from dominic's post.
If I were not flogging Christmas trees for the Boy Scouts this weekend, I would peek in the access under the rear seats to see if the seal is shot and maybe change the sock while I'm at it... (good 80 write up here)
Might be the end of the filler tube so I am borrowing a scope. Rust may be the culprit in the end.
Have you guys scanned the OBD codes? Some EVAP codes may not turn on the CEL. I had a P0456 (Evaporative Emissions System - Small leak detected) on my LC for a long time yet the CEL was never on.
I'll give my $.02. I had to drop the gas tank recently because I had a rust ruptured fuel line I had to replace. While there I realized that some of the other rubber lines that meet at the top of the tank were dry rotted and didn't have clamps on them. I'm guessing these are vent lines for vapor. I had to remove and reseat them during the process and remember thinking these are low priority but I may smell some gas fumes since I had no comfort that they are well seated. Long story short, no fumes before repair, fumes now. I strongly suspect these hoses are allowing fuel vapors to release, more in the summer heat than the winter cold because the rubber shrinks to a tighter connection in the cold and because the fuel evaporates less in the cold. I intend to go back in and replace these lines someday and put clamps on them to boot. Not saying this is everyone's problem but I strongly suspect it's mine.
The best method is to use an evaporative system smoke machine to find where the leak is. Spend a couple $$ for diagnostic at an experienced shop that has one. That's how I found the pinhole leak located on the top of my tank.
The Evap hose on the right side of the diagram was the one I was referring to. Interestingly the diagram shows hose clamps yet there was no evidence of clamps on mine. That length of hose on top of the tube was just pushed on at both sides but was hard as a rock. There was no resistance to slipping it off or on after a slight twist.
Could be a malfunctioning charcoal canister. Perhaps a blocked line (which I would think would throw a code) or maybe fuel got into it. I've heard about the latter when someone had a full tank at high altitude. I smelled it around their truck when they parked and after a bit of a drive the next couple of days it went away.
01 LC. sounds like the canister is the the engine bay. my gas smell is DS in the back. Now that I think about it, the smell is worse when the tank is full.
Same problem with my 00 LX. I'm guessing all my rust has something to do with it. The fill and return lines are pretty corroded and could be a potential leak source.
