Alright 1997, Z28, LT1, cat back, ported, cam, ect...Problem is I'm tripping a P0140 code: Secondary air injection. Now what I've checked: pump turns on and pumps directly from the pump, both check valves are working, checked all the tubes and clear. The problem is between the pump and the cross over tube(which supplies both sides), there are some parts I am unfamilar with. A black plastic deal with a vac tube running to two other vac relays? I am completly new to A.I.R. Please Help I have to pass inspection and as like most of you, taking it to someone is my last resort.:confused::confused: