Please help me friends. At my with end. Have torn this engine down and rebuilt with all new seals and had cylinder head machined. I finally have the engine firing on all cylinders. Sounds smooth as butter. Only problem is. My idle won’t go below 1800.
here is what I have tried.
adjust idle screw all the way in(closed). Blocked off cold start valve(1600 rpm), Adjusted cas. Pinched each hose leading to the intake manifold to see if there is a change in idle(no changes). Cannot hear any vacuum leaks.
known problems are that the manifold gasket that is between the upper and lower parts of the manifold has a tear in it(not very big, definitely not enough to idle at 1800rpm). No o2 sensor connected right now(don’t think it would change idle a lot, maybe I’m wrong?)
