Charcoal / Carbon Canister Delete
10 June 2015, 01:04 PM
#1
Charcoal / Carbon Canister Delete
Hi Everyone.
I am looking at installing an Oil Catch Can and have been wondering whether it is possible to delete the Charcoal / Carbon Canister behind the drivers headlight on my 1998 Terzo to make space for it?
Has anyone done this?
Are there any potential pitfalls and does anyone have a guide?
Thanks.
I am looking at installing an Oil Catch Can and have been wondering whether it is possible to delete the Charcoal / Carbon Canister behind the drivers headlight on my 1998 Terzo to make space for it?
Has anyone done this?
Are there any potential pitfalls and does anyone have a guide?
Thanks.
10 June 2015, 10:55 PM
#4
To remove the fuel breather:
Right, there are two vents on top of the tank. These both have rollover valves which prevent leaks if the car tips.These two vents go into one pipe and then travel down the nearside sill under the carpet alongside the supply and return line.
In the engine bay the vent pipe goes under the inlet and into the charcoal canister. The charcoal canister has three outlets. One to the pressure switching valve on the offside suspension turret and is branched to the inlet pipe post MAF. One to the purge valve on the rear of the inlet manifold which then is connected to the throttle body. The third outlet is underneath the canister and vents to atmosphere.
To properly delete:
1. Vent the tank vents to atmosphere. You don't want to block them as it will prevent excess pressure getting out which will annoy you when filling with fuel. You can either vent to atmosphere under the bonnet or even better back near the tank. I binned the metal hard line that runs back to front along the sill and vented to atmosphere just in front of the tank. However binning this pipe involves taking up carpet and trim etc inside. You can just disconnect and leave the pipe. (You will get a faint whiff of petrol every now and again outside the car.
2. Bin the canister.
3. Bin the under manifold pipe. (Optional and can only be done with taking the inlet off)
4. Block/blank the hole in the underside of the inlet pipe post MAF.
5. Remove the pipe from the pressure switching valve and blank off or remove the T piece.
6. Blank the throttle body nipple.
7. Leave the purge valve connected electronically to prevent a CEL light but loop a small pipe over the two nipples on it to prevent dirt getting in it.
The system is now fully deleted and you have no leaks.
If you simply VTA the breather line you will end up with all those pointless bits in your engine bay. Please note this is how it works on classics (MY00) it may be different on later models with the canister near the tank.
And there are no negative effects form doing this.
Catch cans however.... are a different matter. Done right they are good. Done wrong they can make no difference or make things worse. Look up some of the recent threads for info.
Right, there are two vents on top of the tank. These both have rollover valves which prevent leaks if the car tips.These two vents go into one pipe and then travel down the nearside sill under the carpet alongside the supply and return line.
In the engine bay the vent pipe goes under the inlet and into the charcoal canister. The charcoal canister has three outlets. One to the pressure switching valve on the offside suspension turret and is branched to the inlet pipe post MAF. One to the purge valve on the rear of the inlet manifold which then is connected to the throttle body. The third outlet is underneath the canister and vents to atmosphere.
To properly delete:
1. Vent the tank vents to atmosphere. You don't want to block them as it will prevent excess pressure getting out which will annoy you when filling with fuel. You can either vent to atmosphere under the bonnet or even better back near the tank. I binned the metal hard line that runs back to front along the sill and vented to atmosphere just in front of the tank. However binning this pipe involves taking up carpet and trim etc inside. You can just disconnect and leave the pipe. (You will get a faint whiff of petrol every now and again outside the car.
2. Bin the canister.
3. Bin the under manifold pipe. (Optional and can only be done with taking the inlet off)
4. Block/blank the hole in the underside of the inlet pipe post MAF.
5. Remove the pipe from the pressure switching valve and blank off or remove the T piece.
6. Blank the throttle body nipple.
7. Leave the purge valve connected electronically to prevent a CEL light but loop a small pipe over the two nipples on it to prevent dirt getting in it.
The system is now fully deleted and you have no leaks.
If you simply VTA the breather line you will end up with all those pointless bits in your engine bay. Please note this is how it works on classics (MY00) it may be different on later models with the canister near the tank.
And there are no negative effects form doing this.
Catch cans however.... are a different matter. Done right they are good. Done wrong they can make no difference or make things worse. Look up some of the recent threads for info.
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