Lower vac/Later spool than normal!!!

what the title says usually pushing around 20 IN’ hg" @ idle
Today : 18 IN’ hg" @ idle

Full boost @ about 4k
today : 5k…?

could be a long shot here but maybe its the weather. i did see a difference in vac reading when it was 105 and 70 degrees out

vacuum leak is showing itself because of the cold.

my guess.

my turbo went to -10 @ idle when it got cold, it was just because of the cold temp change, the leak showed itself moreso.

thanks guys i went over the ac with a blow torch… (gas only) and couldnt find the leak… but i think u guys are right as for the later spool im lost…