M50 manifold issue?

[boosteddirty]

Is it normal when the manifold squeaks as I apply some pressure on it. Could it be a torn gasket? It misfires at idle and it get smooth over 3k at highway speeds.

[justin_l_]

Squeek could be the manifold support bars underneath loose or it rubbing on something. Either do a smoke test or spray some carb cleaner around the seals. If the idle changes or you see smoke getting sucked in you have an intake leak.

[boosteddirty]

Thanks a lot for the tip. I might have a small vacuum leak around the wastegate area and boost gauge.