Quote:
Originally Posted by unijabnx2000
If you go read the FSM you will see that the valve (if functioning) lets air/fumes go both directions. Therefore no implosion.
The gas cap is responsible for relieving the vacuum inside the tank
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I've read the FSM. It does not let air/vapor flow both directions the way you may think.
It's designed to be a sealed, one-way system for fuel vapors, hence the term CHECK VALVE. Once you open the line that normally would go to the cannister to atmosphere, it no longer functions as designed; and fuel vapors have no way to leave the tank (explosion hazard).
I get it- according to the drawing, air is able to flow back into the tank through the check valve; but once the seal is broken, it will not suddenly become a vacuum relief valve.
Look at the big picture diagram:
The cap...
You know that WHOOSH you hear when you take the gas cap off to fill it? That's the vacuum pressure being relieved... Not air rushing out... The cap is not nearly as effective as you may think... Sometimes, it even takes sitting thru the night to equalize the pressures... and to fully function as advertised, the system needs to be sealed as designed. If you're running a fairly powerful car with a gnarly fuel demand, I assure you, you can't just seal the tank off & expect the cap to be able to cope... It won't happen.
Really, this is all a moot point because I said that the methods of deleting the cannister are only limited to the ingenuity of the person doing the work... I did it a certain way, and passed off the safety concerns I had with respect to anyone who may read it.
I get the impression you are trying to start an argument and/or split hairs vs. put out anything factual. Again, please feel free to do a writeup of your own.
Irregardless, my method of deleting the evap system is clean & effective; and in the end, that's all that should matter..