Done a smoke test and found no leaks, breather is part of rocker cover so not easy to test, there is a dribble of oil coming through but not sure if it's normal. there is vacuum in the crankcase but I believe there should be, that's how it's designed.
Just not sure of the map sensor, it only measures 970 with ignition on and 950 at idle wheras ambient pressure was just over 1000. Am I right in thinking there is no vacuum in the manifold at idle on these engines?
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