I had built a complicated system on my 86 accord to keep the evaporative canister for my fuel tank, mainly because it's a sealed tank and a pain to convert it, I decided to simplify it and run the bowl vents on the SU's right to the air cleaners themselves, the problem is my tank is still not vented and I need to keep a canister for the tank, do any of these later model Honda's have the simple system like this with the solenoid built right into the canister? talking about the purge solenoid, obviously since they are all fuel injected now, they no longer need bowl vent connections, just a connection to absorb vapors from the tank. if someone could suggest a later model one like this please let me know, also are those built in solenoids 12 volts, or are they running 5 volts logic voltage directly from the ECU?

 

Your float bowl vents are just that vents. Any vapor from the gas that is in the bowl travel's through the vacuum tubes to the cannister. Same thing with the gas tank.

Then when the motor is running a vacuum line from the cannister to the throttlebody/carb base sucks those vapors that have been deposited in it.

I would not attach the bowl vent lines straight to the air cleaner because of vacuum in the air cleaner. It might pull to much vapor from the bowl area and might suck gas from it also.

The gas tank needs to vent period. If you aren't worried about emissions then just let the tank and bowl's vent to the atmosphere. You might want to put a piece of foam on the ends of the vents to stop dust from getting in them.

And for the solenoid you need a computer to control it. The ecu grounds the neg. side of the solenoid. It uses 5v. You can mount the solenoid anywhere, on the side of the cannister on the firewall etc.... The newer systems are the same minus the connections for the floatbowls of course.

I would suggest leaving it alone. It does not effect performance at all, but it does look like crap.

 

I don't have a factory system anymore, I have a complete custom setup, with two SU carbs, instead of the factory single carb disaster, the reason I wanted to do this is to simplfy the evaporative system to just the fuel tank, I'm looking at one for a D series engine, it's 12 volts, it draws power from a junction block and fuse and the computer switches ground, the vent close solonoid is built into the top of the canister, and the purge solonoid is just a garden variety 12 volt one. I aleady have a tem switch in my block for the factory canister, if i use that and an rpm window switch there are my controls.