Nissan 200SX Club - South Africa

so cleaned my afm this weekend was dirty but didn't make a noticeable difference pinched the vacuum line to the dump valve and that seemed to fix the problem where it dies. is this just because the motor doesn't like atmospheric dump valves or could i have connected it wrong? i ran the vacuum line to the dump valve from the vacuum line going directly into the side of the intake.......is this wrong?

Your dump valve is probably leaking, thus causing the motor to lean out too much on idle.

Increase the pre-load so that it doesn't pull open under idling vacuum. If it leaks while idling, I presume it drives like shit at small throttle openings.