928mac

Hey everyone, I know its not a good weekend for questions but ILL fire away anyway.

As you know I am installing the Tec-GT ECM and engine wiring harness.
Well it looks like there is nothing in the instructions for the Electric tank breather valve, the valve that connects to the breather hose that is Y'd to the oil fill tube. section 24 page 216 on the CD and it is letter G

My choice is to leave it out or find what it needs to connect it up correctly.

Now If it is left out I dont want the tank to collapse or for it to start to flood after an hour in hot weather or something dumb like that, so I would like to know as much about it as possible.

I know its a bad weekend with Sitm but it is what it is.

Thanks in advance

Brad

Leon Speed

You can bypass the charcoal cannister annd connect the breather line from the tank to the outside air breather line (nrs. 19 and 20). Plug the line to the engine (nr. 7) or delete it alltogether and plug the vacuum line to the vacuum valve (nr. 40) and you're good to go.



Preferably leave the system intact though but can't help with the ECM question.

James Bailey

The valve opens under certain conditions to pull some air through the charcoal canister to purge accumulated fuel vapors. Early cars had a simple thermal switch on the passenger side head at the rear. As mentioned the switch need not open for the car to run O K that system of fuel vapor recovery is very involved for what it does.

928mac

Thanks James, Great info.
#8 is the valve that I have no wires for.
it is open all the time so I don't think it would be an issue to just leave it in place and leave the vacuum on diaphram #20 then it should still work the same.

I am wondering though, if #8 should close at WOT so that the tank dose not go under a bunch of vacuum and thus work against the fuel pump?

James Bailey

The tank has a breather intake # 25 above