fuel problem

[v-mac]

my car has started acting kinda funky since its getting cold...the thing is reading 16.5 at idle and when i first crank my car and let it sit it will idle fine but when i put it into drive and it lets its clutch out its like it wants to sputter for a second liek its not getting gas, im not sure why its doing this, i understand when its cold out the car might run a little funky but this si aggravating and i dont think it should be doing this.....also when i boost now its like 0-5psi at a certain rpm range like its sluggish and dont wanna get up and go but hit about 3krpm and right around 8psi and boom it just kicks in....my car is acting all kinds of weird sincet eh weather changed and i dont understand it!!WTF

 

[95blackGsTurbo]

First you always want to do a boost leak test. Then I would start checking your coolant temp. sensor. Could be telling the ECU its a different temp. that is actually is and that will cause the car to run rough.