mightysisley
New member
mmm clean - that looks like a more modern system.
at idle, if i plug the hole, the engine seems to bog down a bit
If you are referring to blocking the hole in the manifold where we have learned that mystery pipe is meant to go is slowing the engine, that is because when the hole is left open the engine is drawing too much air basically acting as if you were to press the accellerator pedal slightly.