Howdy i could fix your car But you can probably fix it too,
from your report you have a vacuum leak,
you might need to replace some old hoses or cracked plastic junctions.
and or tighten clamps,
If the clamps are bottomed out remove them ,
get heat shrink and put it where the clamp was, shrink it ,
put the clamp back on,
this should allow the clamp the be able
to apply pressure.