A few notes about my issues with ccp.

I am using a 7747 on top of a mild crossfire corvette. The 7747 has no provision for ccp.
The old crossfire had the solenoid still but I have no way of using it. I have my ccp connected to a ported vacuum source.

The ccp adds an amazing amount of fuel to the intake. When you slow down or stop the engine the cc fills up with the residual fuel vapor.
When you then start your car or take off the engine is immediately flooded with the vapors resulting in an incredibly rich, fast burning mixture.
This is why it is best to disable ccp and egr during your ve work.

Rbob once stated that he had installed an orifice in his vacuum, to control the amount of ccp that is allowed into the mix. I will be trying this next.

At this point a warm start up yields a ~30% too rich condition and a large flare up. Cold starts are just fine.
If you let the ccp fuel burn off the car idles just fine.

I have the following question
The fuel from the ccp seems to be unmetered. Other than a steady state cruise, I can not find a good time to have the cc purge, is there one?

 

Best time for purge is on a warm engine in closed loop. This way the INT/BLM can compensate (somewhat). Some cars used a thermal vacuum switch in the thermostat housing to control when purge took place. I think these can be found on an '87 Regal with the 307, and possibily an '85 Camaro with a CCC (both a CCC systems).

RBob.

{edit: just checked the hose routing label for an '87 Regal VIN Y motor. It shows a Purge TVS beween the cannistor and the CCV (purge control valve, a vacuum operated unit). }

 

You could always do what the TBI vans did. They lacked the purge solenoid until 1993. The earlier units were simply connected to ported vacuum and purged anytime above idle. The TBI units weren't even controlled by a TVS (Thermal Vacuum Switch). My original 1983 carbureted 305 had a Purge Solenoid controlling it though (CCC Q-Jet).

 

So where in tuner pro [address] is there to turn ccp off ?? im blind , LOL

 

No purge control in the '7747.

RBob.

 

thanks rbob, I see that now after what sean wrote.-------SO i just disconect hose, relog and reset blm, ----thinking of trying a orifice as stated------- Update,, drove home with hose off C. CANISTER, and did a quick log of BLM, and see it deff affects readings [leaner now at some cells]----And to the hooking up to a ported vaccum im out of luck, as i have board out T,BODYS, and they are not funtional now.-----------Seans idea seems good, But i guess ill go with orfice. for now. ------

 

so just how much fuel does a canister accumulate? With the current prices of gasoline right now I'd think that if this is still usable fuel, maybe it could be taken advantage of.

 

The purpose of the ccp is to capture the excess fuel and reintroduce it back into the engine.
Picking the best time to add it back to the engine is the trick.