Hey I need some help with what to do with my Charcole Canister.

Little background First.

I have removed all emissions from the car, running an edlebrock intake manifold, with a 1406 carb, vaccum advance distributer, hooker headers, with 3" exhuast.

I had disconected the charcole canister and plugged the line that went to the carb. The problem I was getting a very strong smell of gas after running the car.

I've read through some threads on this and several others have had similar problems. But could not find the answer I was looking for.

I purchased another Cansiter from a local junk yard and planned on putting a new one in the car. Problem the 1406 has no where to hook up the vapor line from the canister. I though about tieing in with the PVC port on the carb. Would this cause me any problems?

If I remove the canister all together with a vented gas cap, I don't like the idea of having a vapor line from my gas tank running to the engine compartment and capped off. Is there a way to completely remove the vapor line? If so how?

I would like to leave it in the car If I could.

I've order a vented gas cap and plan on putting it on with the charcole canister hooked up.

Any help or suggestions would be great.

Thanks.

 

I too had the same issues, I still have my cannister in the car and I run a line from the cannister to the pcv port on the holley carb since I don't run a pcv but 2 breathers. I don't know why you couldn't tap in with say v type splitter to hook up the cannister so that you would pull the fumes into carb and intake. You definately want to keep the vent lines and cannister since it allows the tank to breathe. If you go to a vented cap only, it will still give you gas fumes since it will vent into air when pressure builds in the gas tank. At this point all you can do is just try and see what happens. Good luck and I'm sure there are others who have dealt with this issue and resolved it.

 

I don't think you want the PCV port connected directly to the canister -- the carb will always be ingesting tank fumes, which will affect the mixture. The Qjet used a fancy vacuum pod that would only vent the canister under certain load conditions. The later ECU style was for an electric purge solenoid. The ECU would modify the O2 sensor readings when purge was requested though, it was a special purge mode.

 

I think the ccc-qjet is gone? Could connect the purge line to any port (pcv included) using the early style vacuum operated purge valve(s), well as long as that port got vacuum when the purge valve opened...

How did the ECU modify mixture to account for purge? Seems like it would be self-correcting? I know my '87 uses the electronic valve but I thought it was only open at start up? I'm still trying to figure all this stuff out.

 

You know what, I think I'm thinking of DIVERT mode modifying the O2 values by 100 mv or so. Although I am pretty sure something significant happens when PURGE is requested. I'll have to look at my bin.

 

I went ahead and split the line on the PVC port and hooked it up there.

I do have a solenoid or valve on the line from the fuel tank to the canister. I removed the valve which ran from the canister to the carb when I installed the 1406 and removed the Quad Jet.

I also put on the vented gas cap. Car seems to be running ok, I'll check gas millage at next fill up.

I do have a fairly strong exhaust smell, but this could be due to the lack of emissions on the car.

 

Your strong exhaust smell could be your system running a little rich.

327: During Divert mode modifying the O2 values to compensate for the addition of air into the exhaust manifold would make some sense, except I thought it only diverted AIR into the manifolds during warm-up to help reduce emissions during rich (choke operation and rich dwell prior to O2 warm-up) mixture conditions? ie help combust unburned fuel exiting the chambers.

Keep in mind my understanding is based on empirical observation and info gleaned (sometimes assumed) from several sources. I haven't yet found a definitive description of the sequence of operation.

 

Ok, call me stupid but where or what the hell is a charcoal cannister?

 

on my 84 it is right behind my left front headlight. it looks like a black plastic coffeecan with hoses attached on top. it is used to help vent your gas tank without putting the fumes into the atmosphere.

 

i removed mine a few months back and had the same problem... i eneded up putting a fuel filter on the line to keep anything from getting into it then i ran a piece of hose out a hole that was under my charcoal canister so it vents outside of the engine compartment. have no problems with fumes since...

 

Ah! I always wondered what that thing was. So it isn't necessary to have it then.

 

'So it isn't necessary to have it then.'

Maybe not 'necessary' but highly desirable. As evidenced by the above posts, removing it requires fixing the gas tank and carburetor bowl vent issues, which this device does extremely well without tampering.

The only reason I can come with for removing it would be to 'clean up' the engine bay, which IMO would be better resolved by 'moving' it. Someone with a little ingenuity could come up with several 'hidden' places to mount it where it could still serve its design function.

 

When I bought my 86 carburated TA (the ecm is long gone) it did not have the canister (and in fact, none emission stuff), and of course it has fuel smell. I did tear a canister from a TA wich was teared down and have been thinking of using it. Are there any reasons not to do it?

 

OK, I have the charcole canister problem fixed, the gas smell is gone.

The strong exhaust smell I don't like, I have the carb set stages lean from stock, for my alltitude, 5,500 to 6,000 feet. Main Jet is .92 Metering Rod is 071 x 047 and the secondary jet is .086.

I don't believe I go any leaner with the jets and rods. I still have the stock springs in the carb. and moved the pump arm to the last hole. I have messed with the air mixture screws to maximize vacuum pressure. but still seems to be to rich.

Any one have any other suggestions on what I can try?

Thanks for the help on the Canister.

Jeff