Pull out the vacuum pump and test it. The factory shop manuals show the various types, find out which it is and go from there.The third port on this so called new replacement can likely controls some sort of built in valve with an unknown function which could cause EVAP operation issues. Basically the compatibility is doubtful.
There's only one reason to keep all the junk in that canister system, and that's if you're staying stock, or current regulations in your area mandate they be there. The more complicated canisters with the control valves on top of them may be easier from the engine side of things, I don't know.
I still have the gas tank plumbed to the canister in the engine bay; I haven't swapped the fuel sender/pump in there yet. I was considering leaving the canister in place. I've read a bit about evap and I'm not quite sure of how the evap system valves work. It seems intuitive that it isn't good to pull a vacuum on the gas tank, because it will implode. So, does a functioning evap system pull a vacuum on the canister while some valve to the gas tank is closed? What is the basic premise? Obviously not a simple premise due to all the hoses.
People have told me to vent the gas tank to the atmosphere. Someone told me to use a roll-over valve like they use on off-road jeeps. I bought one; it has a flame screen on it to keep fire from propagating down the vapor line.
Can I rig something that functions better than venting to the atmosphere or venting to the orphaned canister?
Anyway, if nobody suggests a better solution, I will vent the gas tank to a roll-over valve in the engine bay, and dispose of the charcoal canister (sell it if someone wants it). I don't plan to roll the car, but the rollover valve has a nice barb on it and it'll be easy and fireproof. I don't like gas smell; makes people like my wife the car is a hack job.
My harness and ecm have evap delete.
The ports on the new one were smaller nipple than my stock hose(didn’t want to put reducer or any makeshift piece to hook it up)So decided to scrap it and use the guts on my original......and that right there is why I hate car shows and restorations! So, extra port or a glue seam that's not factory? I feel like I'm on classicoldsmobile all of a sudden.
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