I bought a 93 E-150 conversion last week. Great van with only 59000 miles. Every thing works except cruise and air stopped blowing from dash vents on the way home with it. I read on this site how to cut through wheel well to access check valve and vaccum canistor and bypass. Tried new check valve then made a pvc vac canistor and bypassed the old one, no luck, still no vaccum on the blue or white vac line feeding the vent actuators. Also replaced all other dryrotted vac lines on engine. Anyone have a clue where I should turn my attention next.