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I'm trying to figure out how the fuel tank breather valve works.
There doesn't seem to be any consistency when its open, although I'm not getting any manifold pressure warning codes. It seems that when its closed the engine runs with lower HC's, i.e. when more air is being drawn through the engine breather hose. Breather hose is brand new.
Any help in understanding how its controlled is much appreciated.
There doesn't seem to be any consistency when its open, although I'm not getting any manifold pressure warning codes. It seems that when its closed the engine runs with lower HC's, i.e. when more air is being drawn through the engine breather hose. Breather hose is brand new.
Any help in understanding how its controlled is much appreciated.
