Stop in for a cup of coffee

Finally figured out the vaccum leak ...... well, didn't solve it yet but getting closer

Its coming from the exhaust. The air pump ( which is disconnected) has fittings to exhaust. It sounds like it's coming from there very strong.

Like right behind the the point where the cab meets the bed. I got under it with it running and a helper pressing on the gas and I could hear it very strong from the exhaust