Another charcoal canister question.

[jasoncitrano]

K, been researching this topic for a while now. I figured I migh as well make one post everybody can read if they want to take the canister off so there not searching around all day like i've been. I'm almost ready to put my 6 bolt back in after a full rebuild, and i'm trying to get rid of as much crap that i don't need as possible. So, i have a few questions.

1. Will not having the canister/purge installed throw a CEL on a 1G?

2. Should i vent the line coming from the tank or should i cap it off?

3. What are the effects of both?

4. Is this a big contributor to passing emissions or with a downtune can I still pass the idle test you think? (i'm AWD, in IL they only do idle test)

5. Does the canister help produce better gas mileage?


6. Any negitive effects of taking it off?

 

[Lunch_Box]

I will answer your questions as best as I can, I have done it to my car but I have yet to get it running due to other reason but I have also help my friend with his car and he has his emissions removed.

1. Never caused a cell
2. Capped it off
3. His car is running great and the engine bay looks clean
4. The charcol canister is big for emisions, all the lines head into it so i don't think you could pass with out it. But I am not 100% about that because I don't have to worry about that.
5. Didn't notice differences
6. No negative effects just a cleaner looking engine bay.

Hope this helps you out.

 

[jasoncitrano]

perfect thanks alot man.

 

[xcelr8n]

theres a local guy here who passed the etest in his awd, with no emissions lines, no cat, and hks 272 combo... its all in the tuning.

 

[92redman]

The only way you would fail emissions is if they do a visual inspection and see that the charcoal canister isn't their/not hooked up. The carcoal canister is actually only for evaporative emissions, doesn't really affect your exhaust emissions since it isn't constantly purging.

 

[jasoncitrano]

so should i vent it with a filter or cap it off then ?

 

[ho bag]

be careful some places will acutally test the fumes comming out of your tank as well, but for the most part it dont do shit

 

[na_turbotalon]

I capped mine off. I figured if for some reason there's an abundance of fuel fumes coming out of there, it won't be so pretty the next time I disconnect my battery and there's a spark right beside it.

 

[TSIfreek]

I would cap it off. If to much pressure builds in the tank the gas cap releases that pressure.

 

[jasoncitrano]

that's exactly what i was thinking... it would just vent excess pressure through the gas cap. That's assuming mine's not broken ! hah just kidding it's all good. By the way where do you get those little rubber block offs like i see people have on the throttle body?

 

[tsi_daggie]

as for gas mileage wise i have had mine disconnected for about 800 miles and a blocked egr valve, and removed all the vacuum lines related to emissions,

and i actually noticed an increase in gas mileage by about 2-3 miles. could also be driving habbits though.

my .02

 

[jasoncitrano]

thanks for all the input

 

[ltvarney]

I removed the charcoal can and my car ran like crap once it hit less than 1/2 tank. It would miss all the time and acted like it was suffering from fuel starvation. It once got to a point where it would barely idle. I put in a 255 Walbro thinking my fuel pump was dying and it still did it. One day I had the battery out and noticed the cap had shot off of there, so make sure you ziptie it down tight. Maybe it was coincidence but once I re-capped it, I didn't have any more problems.