04 cobra w/ 2.8H Low on boost

[sickass50]

I'm running a stock lower and 3.5" upper pulley, Car usually made about 19lbs of boost. The other day i noticed the car only made 14-15 lbs. I've tried a new belt and checked all vacuum lines and line running to boost gauge. I'm picking up a new tensioner tomorrow and trying to see if anyone has any other ideas. Thanks

 

[03ChvyEtr]

With a 3.5 upper stocl lower you should be around 17-18 i have a 3.5 with 2lb lower and i see 19-20

 

[61mmstang94]

Seal leaking somewhere?

I don't see why, if nothing was changed, that it would suddenly lose boost and show no other effects unless pressure was leaking out somewhere?

 

[01yellercobra]

What about weather change?