my question is that in San Diego CA my vaccum read 20 and now that I'm in Denver CO my vaccum reads 14. Can atmostphere or high altitude affect vaccum readings by 6. I really hope so.

 

i dont think that is normal, Where in denver do you live.

 

Yes altitude does affect vacuum (makes it go down) so that is normal. 6mmHG is a lot, didn't think it was that bad but i guess so.

 

If I had a vaccum leak somwhere would vaccum go up or down. Is this a sign of bad motor if vaccum is at 14.

 

I understand that vacuum usually is reduced about 1" Hg for each 1000 ft in altitude. Really interesting when you consider that weather reports show barometric pressure at 29.96" Hg for the "standard value" even at 10000 ft. elevation. It's not, but apparently they "correct" the numbers to sea level, whatever that means!

---- Bill

 

I live at sea level, and when I go to Palmdale I get a low 15 inches of vacuum.