Carbon Canister Removal

Carbon Canister Removal

Author
Discussion

ProjectChimaera

Original Poster:

197 posts

113 months

Sunday 16th October 2016
quotequote all
Hi, I'm not planning to refit the carbon canister whilst the body is being refitted. I'll vent the tank with a filter at the back somewhere and it saves running new pipes etc. To the front.
Could anyone advise if I should remove the electronic valve and connect to the wiring? Will the engine management system detect a defect if I leave it disconnected?
I've read the previous threads on this but can't see any mention of the connector.
Thanks

PhilH42

690 posts

102 months

Sunday 16th October 2016
quotequote all
I've not disconnected any wiring and it hasn't had any detrimental effect.

Discopotatoes

4,101 posts

221 months

Sunday 16th October 2016
quotequote all
ProjectChimaera said:
Hi, I'm not planning to refit the carbon canister whilst the body is being refitted. I'll vent the tank with a filter at the back somewhere and it saves running new pipes etc. To the front.
Could anyone advise if I should remove the electronic valve and connect to the wiring? Will the engine management system detect a defect if I leave it disconnected?
I've read the previous threads on this but can't see any mention of the connector.
Thanks
No problems just disconnect

ProjectChimaera

Original Poster:

197 posts

113 months

Sunday 16th October 2016
quotequote all
Thanks chaps, saved me some work!

QBee

20,953 posts

144 months

Sunday 16th October 2016
quotequote all
It's job is to save the cats from damage.....so as my car is decatted, we deleted it and put a clutch servo in its place.
Love my clutch servo........

ClassiChimi

12,424 posts

149 months

Sunday 16th October 2016
quotequote all
QBee said:
It's job is to save the cats from damage.....so as my car is decatted, we deleted it and put a clutch servo in its place.
Love my clutch servo........
Save the cats from damage, can you explain that for me Anthony?
I'm confused hehe

QBee

20,953 posts

144 months

Sunday 16th October 2016
quotequote all
As I understood it, the job of the carbon canister on catted cars is to be a suppository for petrol fumes vented from the fuel tank. It's not required on non-cat cars, so my assumption was that petrol fumes could damage the cat.....

ClassiChimi

12,424 posts

149 months

Sunday 16th October 2016
quotequote all
Petrol fumes reaching the Catt could get a bit explosive, I'm under the impression the fumes come from the canister back into the plenum and get re entered within the fuel mix so should ignite, maybe ignoring the canister on catted cars increases the fume percentage to dangerous levels and leaves residue in the Catt, thus slowly cooking the thing.
I think I'm understanding the principles now, cheers smile

Sardonicus

18,957 posts

221 months

Sunday 16th October 2016
quotequote all
Its to put the fumes through the intake plenum where they can be ingested & burnt nothing do do with cats its so the tank dont vent to atmosphere, in my Honda dealer days Honda was using evaporative canisters even in the 70's along with other Japanese manufactures

ClassiChimi

12,424 posts

149 months

Sunday 16th October 2016
quotequote all
Sardonicus said:
Its to put the fumes through the intake were they can be burnt nothing do do with cats its so the tank dont vent to atmosphere, in my Honda dealer days Honda was using evaporative canisters even in the 70's along with other Japanese manufactures
That's what I thought wink

QBee

20,953 posts

144 months

Sunday 16th October 2016
quotequote all
Furry nuff. My wrong assumption.
I didn't even know my car had one until John Halstead binned it and put my clutch servo in the space. He said I didn't need it because my car was decatted. But he installed a purge valve front left.

ClassiChimi

12,424 posts

149 months

Sunday 16th October 2016
quotequote all
Has or will the servo require any servicing Anthony, I'm finding my left foots going numb after a few hours driving and could do with lightening g the clutch pedal somewhat. Do you have any pics of it being installed or owt mate.
So far I've got a very sensitive throttle pedal, equally enjoyable light to use brake pedal with huge braking potential then I've got a clutch that leaves an imprint of the pedal rubber in my shoe and gets tiresome in traffic.
From a driver enjoyment point of view this servo mod could be one of those lovely touches that finally gives my feet a rest and moves the car on to a higher level of driving pleasure.


SILICONEKID345HP

14,997 posts

231 months

Sunday 16th October 2016
quotequote all
When does the ECU decide to vent the fumes in to the intake ?

Been reading mpg can drop by removing the system.

[footnote]E

Edited by SILICONEKID345HP on Sunday 16th October 21:46

Discopotatoes

4,101 posts

221 months

Sunday 16th October 2016
quotequote all
SILICONEKID345HP said:
When does the ECU decide to vent the fumes in to the intake ?

Been reading mpg can drop by removing the system.

[footnote]E

Edited by SILICONEKID345HP on Sunday 16th October 21:46
MPG does drop Daz because most people who get rid of it are modding their cars to go faster. IE more right foot

ClassiChimi

12,424 posts

149 months

Sunday 16th October 2016
quotequote all
SILICONEKID345HP said:
When does the ECU decide to vent the fumes in to the intake ?

Been reading mpg can drop by removing the system.

[footnote]E

Edited by SILICONEKID345HP on Sunday 16th October 21:46
The Ecu purges the system ( when upto speed )


caduceus

6,071 posts

266 months

Sunday 16th October 2016
quotequote all
Darn, I didn't even think about this as part of the resto. I assume it's not as easy as just pulling the canister out is it.. What do you do with the pipes leading to and from it?

N7GTX

7,855 posts

143 months

Sunday 16th October 2016
quotequote all
SILICONEKID345HP said:
When does the ECU decide to vent the fumes in to the intake ?

Been reading mpg can drop by removing the system.

[footnote]E

Edited by SILICONEKID345HP on Sunday 16th October 21:46
Usually when the ECU detects that the throttle is not on idle. As Simon says above, it is a way of preventing petrol fumes from simply being dumped to atmosphere (like old carb cars) mainly in city centres where there are traffic jams. Once the throttle is pressed, the ECU opens the carbon valve and the fumes are drawn into the intake and burnt in the normal way. As they increase the fuel to the engine, you use slightly less right foot and so save a little mpg.

Discopotatoes

4,101 posts

221 months

Monday 17th October 2016
quotequote all
caduceus said:
Darn, I didn't even think about this as part of the resto. I assume it's not as easy as just pulling the canister out is it.. What do you do with the pipes leading to and from it?
its the rubber hose from the panel behind the petrol filler cap runs to the front of the car along the passenger side then crosses over to the drivers side, then you have your hose from the drivers side inner wing nearest the front of the car, to the plenum. as i recall the canister can be accessed through the front grill

QBee

20,953 posts

144 months

Monday 17th October 2016
quotequote all
ClassiChimi said:
Has or will the servo require any servicing Anthony, I'm finding my left foots going numb after a few hours driving and could do with lightening g the clutch pedal somewhat. Do you have any pics of it being installed or owt mate.
So far I've got a very sensitive throttle pedal, equally enjoyable light to use brake pedal with huge braking potential then I've got a clutch that leaves an imprint of the pedal rubber in my shoe and gets tiresome in traffic.
From a driver enjoyment point of view this servo mod could be one of those lovely touches that finally gives my feet a rest and moves the car on to a higher level of driving pleasure.
You have driven my car, Alun, so know how my clutch feels - about 40% less heavy.
I don't have any photos of the installation process, and the car is away at Mat Smith's at the moment, so I cannot take any.
I seem from memory to have two brake-pipe thin copper pipes, which presumably carry the hydraulic fluid to and from the servo, and a vacuum pipe that connects to the top of the engine to make it work. IIRC it is an MGB brake servo, in order to be small enough to fit while being the correct ratio to work.Must have been a barstewaed to install.
Mat has a theory that it would work even better if the pipes were not so thin, but my knowledge of hydraulic systems is nearly 50 years old, so stopped when I was giggling in class at the thought of Archimedes' screw. So I didn't argue with him.

ClassiChimi

12,424 posts

149 months

Monday 17th October 2016
quotequote all
Im not sure I've driven it since the extra servo was fitted Anthony. I'm sure there's a thread somewhere that details this mod so I'll keep looking.
Cheers.