quite loudly at idle. When I just blip the throttle it quiets down. Also when I pull the electrical connector, it stops buzzing. I know the ECM controls it, and possibly at a duty cycle. Just not sure why it is making all this noise at idle. Could the little vac valve be bad? Didn't do this last year, but I did perform some major porting work on the base/runners/plenum this winter. I am also sure that everything is hooked up right.

Just kind of anoying really, not sure if it is doing any harm.

 

Anyone have any ideas? Is the solenoid bad, or the little purge valve? When I just blip the throttle it quiets down. Maybe I should just leave it unplugged..