Hi,
I had a knocking noise coming from the inlet manifold, so I removed the manifold and stripped out the butterfly valves in the manifold, resealed the manifold and refitted. I am pretty sure the manifold is air tight. Now I have a problem in which I didn't have before(but the knocking noise has now gone
), the car will idle at about 2krpm, and drives quite rough, the car still seems to pull and rev when you don't have your foot on the accelerator. I have made sure that the throttle cable is routed correctly.
One thing I have done, is remove the valve(flap) out from the top left of the manifold where the other VIS motor is situated. Could this cause the problem? What exactly does this thing do? Do the cars normally run ok with the VIS valves disconnected?
Thanks.