Purge solenoid with MS
 

Hey all,

Guys running MS, how did you connect the purge solenoid, the one allowing vapors out of the charcoal canister into to intake at startup? My car is running well but I have trouble starting, so I was thinking maybe that would be the cause.

Thanks

That is just an emissions thing as far as I know. I know I tossed it during my engine bay cleanup.

nothing to do with the purge solenoid

When installing an MS, the purge solenoid is generally left unconnected, rendering it inoperative. (It remains in a closed state when unpowered.)

This solenoid is not your worry.

The reason I was asking is to know whether you lose gas as vapors when you render the system inoperative.

When stock, the ecu opens the valve and recovers the vapors from the canister at startup but if you don't do it, do you lose all the vapors through the canister or do they convect back to the tank when you ride?

The vapors are "lost" as you put it. The canister needs to be purged to keep it operating efficiently, and drawing the vapors into the engine and burning them was simply a more eco-friendly thing to do than venting them to atmo (which would defeat the purpose of the whole system.)

It's not as though you are recovering a meaningful amount of "lost" energy from the process, however. We're talking about extremely trivial amounts of fuel here. You're not going to notice a decrease in fuel efficiency, if that's what you're worried about.