I've done the UIM twice just by sucking cleaner through the two vacuum lines, but have never taken the intake manifold off. I'm really stuck on how to get rid of this problem
I'm hoping that later this week when I pull the manifolds off that the existing gasket is in rough shape. Perhaps there is a small leak of unmetered air into the manifold when the engine is stone cold, but after a few minutes runtime it seals... Any thoughts? Almighty Ray???
