vapor canister valve

i recently removed the charcoal canister on my 1985 caprice 5.0L. I was wondering if there was a need for the purge valve on the front of the engine if the canister was taken out. thanks

i dont belive so, most of my emmissions vaccum lines have been removed along with the purge valve

i recently removed the charcoal canister on my 1985 caprice 5.0L. I was wondering if there was a need for the purge valve on the front of the engine if the canister was taken out. thanks

You can remove it but I have to ask you a question regarding its removal:

Yes, it's an emission component, but it does not negatively affect performance (the canister, that is). What it WILL do is prevent a fuel odor and it will also help the car start easier when it's cold.

Without it, you gain nothing but vapors and a somewhat harder-to-start-in-the-morning car.

Personally, with the price of gasoline being what it is, I don't want to see my pocket change simply airing out into the atmosphere where my car gets nothing out of it.

the canister was making a fuel odor plus the filter needed to be changed + the wheel well which it sits on has a huge rust hole thats why i took it out.
so all of the other vaccuum lines can be pluged then thats attached to the purge valve?

I can understand the rust hole, but the filter is only a dollar or two and it's easy to replace. Also, by getting rid of the canister, you're not going to eliminate the vapor odor, it will remain the same or get worse. You probably have a problem somewhere else in the system, possibly a bad purge valve, etc.

As for the vacuum lines, just remove them and cap the Ts so that you can put it back at some point if you decide you've had enough vapors.

I've got the same thing with my canister, mine still connected to the line that runs to the gas tank though, but i also have a rust hole forming under it, i just dont want to deal with the gas odor, even though its not connected to the carb system

ive been messing out in the garage all day today, having the car on and off testing for gas smells and i cant smell any. when do these gas odors occur? ps i put a vaccuum plug over the line to the gas tank also

mine used to have an odor, but not recently though, probably because i was told i had a slight leak too. but i noticed the odor after driving it for a couple of minutes, for me at least anyway

would that hinder the preformance of the engine in any way by having all of those vaccuum lines pluged and no canister?

You can remove it but I have to ask you a question regarding its removal:

Yes, it's an emission component, but it does not negatively affect performance (the canister, that is). What it WILL do is prevent a fuel odor and it will also help the car start easier when it's cold.

Without it, you gain nothing but vapors and a somewhat harder-to-start-in-the-morning car.

Personally, with the price of gasoline being what it is, I don't want to see my pocket change simply airing out into the atmosphere where my car gets nothing out of it.

Silicon, thanks for setting the record straight. You're a better man than I am for answering that post, people who know nothing about emissions systems should leave them alone or get a pro to work on it.

Bob

In my experience, a lot of people remove their emission components looking for more power. While that was plausible on cars made in the 70s, with their restrictive bead cats, and whatever else, what a lot of people don't realize is that cars made from 1980-1981 on (the 4C and the later 3C computer controls), you can actually hurt the engine's performance by removing that stuff. The computer system not only cleans up the tailpipe, but it also helps the engine to run at optimal spark advance, fuel delivery etc and this helps performance. Remove the computer and you remove the optimizations.

I've also seen a fair amount of people remove the vapor recovery system, also looking for power or discounting its benefit (as the original poster here seems to be doing). The vapors stored in the canister when the engine is not running provide a nice boost for the cold engine during startup. The cansiter also gives these vapors somewhere to go when the engine isn't running, as you know.

Capping off the line to the fuel tank is inviting disaster somewhere. This is the tanks' vent, and by plugging it the original poster is setting up a situation where excess pressure in the tank can lead to serious engine flooding, fuel spillage or other potentially dangerous conditions. Remember, the vent in the fuel cap only prevents vacuum formation within the tank, it does not prevent pressurization.

thanks for the replys. i unpluged the fuel vapor line and hooked it back up to the canister until i replace rotted out fenders and have better access to the rust hole under the canister

good explanation on the emmissions silicon, if it were up to me i would have left every emmissions feature on my car even though we dont have inspection here in FL anymore. just in case i were to ever move out of state and bring the car with me.

I drive an '84 Caprice that is completely emissions compliant. It gets good gas mileage if I can keep my foot out of the carb. The 4-barrel works well when I need it. Acceleration is great and an overall nice driving car with no bad habits.

I still maintain that if you keep your emissions system intact and in good working order, your car will run great (unless you have other problems) and be good emissions-wise.

Bob

yeah im trying to get this acceleration issue straightend out soon on mine, i gotta get new front brakes, the tranny inspected & flushed (which i belive may be why im having accelerating issues)