Today I summoned up courage and take out my Intake manifold on 2000 year model as I have been having same issues with the OP and there are leaks all around the upper manifold and lower manifold gasket. I remove them apart and behold both gaskets...
I changed the whole brake assy as advice by my mechanic. When I checked the faulty one, I discovered it was the motor that was faulty which I also repaired and keep as spare. It was only the brush inside the motor that was changed.
The motor...