The MAP sensor gets vacuum from small lines in intake manifold for example.
Something has clogged a line somewhere, old gasket pieces etc.
I have seen this same symptom, where there is a LARGE sucking sound when you remove the oil cap.
But this guy coated both sides of the gasket with RTV. In this case the intake manifold had to be replaced, because the RTV had clogged up the passages so bad I could not get it out.
I would remove the manifold and blow out ALL the passages with compressed air. Make sure feel the air come out the other end.
Thursday, January 29th, 2009 AT 11:30 AM