I have a 1993 Isuzu Trooper LS with a 6 cylinder. Does anyone know
where I can find a diagram for the vacuum system. I'm not sure the
vacuum is the problem, the engine surges between 2500 and 3500 rpm
once it gets warmed up and I'm headed slightly uphill. Backing off the
gas or giving it a bit more stops it, but I found some vacuum tubes
that are unattached and I can't find a place to attach them. Any help,
suggestions, would be appreciated.

Joseph