i have 93 civic with a gsr i brought a ecu from phearable.net and on the paper that i got with the ecu it says if tyou have gsr or h22 their ecus do not support the intake air butterfly systems.simple remove the vacuum source from the back of the intake manifold that runs to the IAB box and plug the vacuum port on the intake manifold. does anybody what hose thier talking about or what IAB box is or where the port is on intake thanks

 

it is under the manifold on the driver side. its a black box and it plugged in to the engine harness. only one vc is hooked up to the manifold. it is not bolted in just held their by a big clip