Gas Return Vapor evaporative control Tube thingy?

[bass-o-matic]

I was under my truck, you know just drankin' a beer... and I noticed that the rubber hoses that are along side the metal filler tube to the gas tank are getting dry rot.

I assume those are part of the evaporative control system?

Anyone ever replaced them? Got any blow ups or part numbers? There looks like some kind of canister... wonder if it needs to be replaced.

Thanks

 

[Lindenwood]

I wouldnt mess with it until you get a P0440 (generic issue with fuel vapor management), P0441 (specific fuel vapor purge system malfunction), or P0446 (fuel vapor management system control circuit malfunction) code. I occasionally get all three, and everything I have read is you have 4 options:

1) Throw money at it to replace random parts until its fixed (including $50 switching valves and the $300 charcoal canister).

2) Spend hours under the truck trying to find the specific leak or circuit failure.

3) Take it in to have somebody smoke-test the whole system ($$$, but I am almost there).

4) Clear the codes and keep driving (going on 16 months of this).


If it were a more vital system, I'd be all over it. But, this problem is one of low risk and high annoyance, so I'd be more scared of causing a problem in a sysyem that is currently functioning than I would be of those hoses failing on their own.

 

[4Runner4Leon]

I agree that until/unless you get a code, there is no need to mess with anything - it's not a critical system that will leave you stranded if it malfunctions.

If you do start getting codes, Lindenwood is exactly right on the options you have. I'm presently dealing with this issue on an '01 Lexus.

I tried resetting the codes, but that gets old after a while, plus I won't pass smog when the time comes. The system is full of hoses, but diagnosis comes down to two areas - either one of the components is malfunctioning (VSV, vapor pressure sensor), or there is a leak through a hose or the canister itself.

You can use a 9V battery to check each VSV (it should not allow air to pass when closed, then it should click with power applied and allow air to pass).

As for leaks, I bought an $80 smoke machine which hopefully will pinpoint me to the leak location. I haven't used it yet because after looking closely, one of the hoses was broken in half. Since I already replaced another hose earlier, I decided to stop messing around and bought a whole new set of hoses, since they are all hard as a rock at this point. Maybe after that my problem will be resolved.

 

[bass-o-matic]

Thanks guys! Good advice. Since it's low risk. I'll let it be.

 

[JRZEE2000TR4LTD]

I agree that until/unless you get a code, there is no need to mess with anything - it's not a critical system that will leave you stranded if it malfunctions.

If you do start getting codes, Lindenwood is exactly right on the options you have. I'm presently dealing with this issue on an '01 Lexus.

I tried resetting the codes, but that gets old after a while, plus I won't pass smog when the time comes. The system is full of hoses, but diagnosis comes down to two areas - either one of the components is malfunctioning (VSV, vapor pressure sensor), or there is a leak through a hose or the canister itself.

You can use a 9V battery to check each VSV (it should not allow air to pass when closed, then it should click with power applied and allow air to pass).

As for leaks, I bought an $80 smoke machine which hopefully will pinpoint me to the leak location. I haven't used it yet because after looking closely, one of the hoses was broken in half. Since I already replaced another hose earlier, I decided to stop messing around and bought a whole new set of hoses, since they are all hard as a rock at this point. Maybe after that my problem will be resolved.

Link for that $80 smoke machine?

 

[4Runner4Leon]

Link for that $80 smoke machine?

https://www.ebay.com/itm/EVAP-Smoke...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

I haven't used it yet, so can't say anything about how well it works. The reviews on Amazon seemed pretty good though.