what does the EVAP purge solenoid do, and do i need it? I ask because i dont have it on my car. thanks

 

Purges vapors from fuel tank into the intake manifold. it's an emission componant. It isn't nessecary from a performance point of veiw but if in cali, you'll need it to pass smog. if obd2, you throw a trouble code. but if left in place if doesn't effect performance because it operates when the engine is decelerating or cruising. it doesn't funtion during acceleration.

 

all it is is a solenoid that the computer (ecu) activates to use engine vacuum to pull fuel vapors out of the charcoal cannister. its fairly unobtrusive but it can cause idle problems depending on your motor setup. on a close to stock setup theres no reason to not use it.

 

thanks for the feedback guys, one line goes to the IM im assuming and the other from the canister? where should the line from the canister hook up to the canister