A FEW OF YOU MIGHT REMEMBER MY LAST POST;I HAVE AN 84 NO VACUMN TO THE HVAC CONTROL;I WAS LOOKING FOR A VACUMN DIAGRAHM.THANKS TO ALL OF YOU THAT RESPONDED.NEVER FOUND A DIAGRAM,BUT FOUND THE PROBLEM.HOPEFULLY THIS MIGHT HELP SOME OF YOU.GETTING FRUSTRATED TRYING TO FIND THE PROBLEM,I'M IN THE GARAGE HAVING A STIFF WHISKEY AND WATER,MY NEIGHBOR WALKED IN,TO SEE WHAT I WAS DOING.AND IT HIT ME.INSTEAD OF TELLING HIM TO TAKE HIS CIGAR OUTSIDE(I DON'T SMOKE). I INVITED HIM IN WITH HIS CIGAR(SHOCKED HIM). and i ask him to take a big puff and blow on this,I PULLED THE MAIN VACUMN LINE OFF THE MOTOR,AND ASK HIM TO BLOW THE SMOKE INTO THE VACUMN LINE.HE'S BLOWING AND I'M LOOKING.LOW AND BEHOLD FINALLY SMOKE SIGNALS. WHY WOULD THERE BE SMOKE COMING UP FROM THE STARTER. JACKED UP THE CAR,CRAWLED UNDER ,ITS COMING FROM THE WIRING HARNESS.OPENED THE HARNESS,AND THERE IT WAS ,A VACUMN LINE BROKE IN HALF.TURNED OUT THIS IS THE ROUTING OF THE MAIN VACUMN TO THE INSIDE OF THE CAR.G.M.'S BRILLIANT ROUTING PLAN,USED 3 FOOT OF LINE RATHER THEN 10 INCHES THROUGH THE FIREWALL. ANY WAY,OPENED THE HARNESS ROUTED NEW VACUMN LINE,REPAIRED THE HARNESS,FIRED IT UP,NOW EVERYTHING WORKS GREAT. MORAL OF THE STORY. THIS IS THE FIRST TIME SMOKING SAVED A LIFECAUSE I WAS ABOUT READY TO KILL SOMETHING,BUT NOWHAPPY AS HELL