Possible fix for charcoal canister - Toyota RAV4 Forums
4.3 Mechanical Intakes, Exhaust, Tune-ups, 4x4 system, Suspension, Brakes, etc.

User Tag List

Reply
 
LinkBack Thread Tools
#1 (permalink) Old 03-18-2013, 02:01 PM
Junior Member
Country: Tedh98's Flag is: United States
 
Join Date: Mar 2013
Location: GA
Posts: 7
Thanks: 0
Thanked 4 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
Possible fix for charcoal canister

My wife's 2007 V6 RAV4 has about 123K miles. The other day the check engine, VSC and one other light suddenly came on.

Took it to the dealer and was told it would take $1,400 to replace the charcoal canister, gas cap and vacuum switching valve.

I thought I'd take a shot at fixing it myself and started with the cheapest fix attempt first - replacing the charcoal pellets.

Without too much effort and a carpenters knife, the back of the canister comes off:





$18 of charcoal from the petstore:


Measure the height of the old charcoal before dumping out. Once the new charcoal is in, put these spring loaded pieces in place:


I did this Sunday morning and my wife needs the car for Monday morning. Since I didn't have time for epoxy to fully cure, I "welded" it back together.




Not pretty but it should hold:


Ready to be bolted back in place:



It took 2 days of driving before the lights came back on after being reset at the dealer. If the lights stay off by Wednesday I think I'll call this a good fix. If not, I'll try replacing the vacuum switching valve as it is the 2nd least expensive item on the repair list.

I can't believe, well I guess I can, that they are charging $392 to swap this part. I think I was on the garage floor for about a total of 30 minutes.
Tedh98 is offline  
The Following 3 Users Say Thank You to Tedh98 For This Useful Post:
Carbon (04-18-2013), EDMR2 (08-14-2013), TrdLtly (01-24-2014)
Sponsored Links
Advertisement
 
#2 (permalink) Old 03-18-2013, 02:38 PM
Advanced Member
Country: WJBertrand's Flag is: United States
 
WJBertrand's Avatar
 
Join Date: Feb 2011
Location: Ventura, CA
Posts: 776
Thanks: 30
Thanked 44 Times in 43 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
I don't know how the engine control module can monitor the condition of the charcoal itself, so I'm betting the problem is the VSV anyway. The charcoal shouldn't go bad (become completely saturated) as long as the VSV and other components in the evaporative emissions system are working correctly and pulling off the absorbed vapors as designed.

Did the old charcoal smell strongly of gasoline?

WJBertrand
2011 Rav4
WJBertrand is offline  
#3 (permalink) Old 03-18-2013, 02:58 PM
Junior Member
Country: Tedh98's Flag is: United States
 
Join Date: Mar 2013
Location: GA
Posts: 7
Thanks: 0
Thanked 4 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
To answer your question - No. When I popped the back off, I was expecting a strong gasoline smell. But it wasn't strong at all.

I'm still hoping that after 123K miles, the pellets have absorbed something and airflow is being limited through the system and that is what is tripping the computer codes.

If I had those codes at a 1/3 or 1/2 the miles like I've read about, then I wouldn't have suspected the charcoal itself.

If the car comes home tomorrow with the lights on, then $60 for the valve and the $20 for the charcoal still isn't a bad risk at trying to fix this.

The one thing that concerns me is that there is an electronic solenoid bolted to the canister. I can't seem to find that part by itself. So if that turns out to be the culprit, it is looking like the only way to get that is with buying a new canister.
Tedh98 is offline  
#4 (permalink) Old 03-23-2013, 09:43 AM
Junior Member
Country: Tedh98's Flag is: United States
 
Join Date: Mar 2013
Location: GA
Posts: 7
Thanks: 0
Thanked 4 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
5 days and 212 miles later, no lights.

Feeling really good about saving $1380.
Tedh98 is offline  
#5 (permalink) Old 03-23-2013, 11:57 AM
Your Humble Administrator
Country: JuneBug's Flag is: United States
 
JuneBug's Avatar
 
Join Date: Nov 2008
Location: Baton Rouge, LA
Posts: 10,574
Thanks: 72
Thanked 1,098 Times in 793 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Garage
Quote:
Originally Posted by Tedh98 View Post
5 days and 212 miles later, no lights.

Feeling really good about saving $1380.
Congratulations! I love being able to repair something that has been deemed "unrepairable" by design. And being able to save that much money at the same time is amazing!

James
__________________

2008 Limited V6 2WD "The Silver Bullet"


JuneBug is online now  
#6 (permalink) Old 03-23-2013, 12:15 PM
Advanced Member
Country: WJBertrand's Flag is: United States
 
WJBertrand's Avatar
 
Join Date: Feb 2011
Location: Ventura, CA
Posts: 776
Thanks: 30
Thanked 44 Times in 43 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Tedh98 View Post
5 days and 212 miles later, no lights.

Feeling really good about saving $1380.
Good news and a brilliant repair - it seems to be holding. Please keep us updated.

WJBertrand
2011 Rav4
WJBertrand is offline  
#7 (permalink) Old 03-28-2013, 10:10 AM
Member
Country: RoLleRKoaSTeR's Flag is: United States
 
Join Date: Sep 2010
Location: E-town
Posts: 60
Thanks: 1
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
I will have to look at this repair myself.

Does the VSV (solenoid section) come off? or is it a part of that "box"?
RoLleRKoaSTeR is offline  
#8 (permalink) Old 03-28-2013, 11:02 AM
Junior Member
Country: Tedh98's Flag is: United States
 
Join Date: Mar 2013
Location: GA
Posts: 7
Thanks: 0
Thanked 4 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
Quote:
Originally Posted by RoLleRKoaSTeR View Post
Does the VSV (solenoid section) come off? or is it a part of that "box"?
When I looked at the parts diagram, the VSV appears to be a separate component. There is an electronic valve/solenoid attached to the canister with three bolts. I don't know what exactly that is and it doesn't appear to be purchased (new at least) by itself. I removed it when I took the back of the canister apart because I wasn't sure what I was getting into.

It doesn't need to come off to do the repair, but it does make the canister a little easier to stand on end.
Tedh98 is offline  
The Following User Says Thank You to Tedh98 For This Useful Post:
bruce chamberlain (04-21-2013)
#9 (permalink) Old 03-28-2013, 02:38 PM
Advanced Member
Country: friendly_jacek's Flag is: United States
 
friendly_jacek's Avatar
 
Join Date: Jun 2006
Location: Alabama
Posts: 2,488
Thanks: 27
Thanked 36 Times in 36 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Great DIY fix, thanks for posting. I assume this is an infrequent problem. Never heard of it before.
friendly_jacek is online now  
#10 (permalink) Old 03-28-2013, 07:52 PM
Advanced Member
Country: ronbo1313's Flag is: United States
 
Join Date: Dec 2006
Location: western new york
Posts: 1,033
Thanks: 1
Thanked 28 Times in 27 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Send a message via AIM to ronbo1313 Send a message via Yahoo to ronbo1313
Great fix.
I read that vehicles especially Toyota's are sensitive to being over filled with gas. It will screw up the emissions system. When the pump clicks off, it's suicide for the car to fill anymore by topping off the tank..
ronbo1313 is offline  
Sponsored Links
Advertisement
 
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome