HELP boost Problems

[lastdaze04]

I have a Trilogy system that I have had for a year and 1/2, and till now has been trouble free (and fun). It currantly has a 3.2 pulley, JLT intake and a 'canned' tune from Lidio. I have cleaned the filter, put a new belt on, checked for leaks (found none). I should be running 9-10lbs boost or was running that till today best I could do was 6.5-7.0lbs. I've also changed to some NGK-TR6 spark plugs. The car runs flawlessly no misses, pops, or sputters, in fact if I just hadn't got a wild hair today I would not have noticed that I was not getting full boost. I don't street race much and have only taken it to the track one time and went down the 1/4 once to post a time here (a year and 1/2 ago). What am I missing????
All help will be appreciated.
Thanks in advance
Rick

[KillJoy]

Loose / Slipping Belt?

KillJoy

[Adam12]

try checking the watsegate diaphram on the blower with a vaccum tester. if u pull a vaccum and it holds than its ok, if not than thats causing the low boost allowing it not to build. also check the vaccum lines to the diaphram for swollen end or crackes which will not let the diaphram to open and close correctly.

[lastdaze04]

Loose / Slipping Belt?

KillJoy

I have a new one on, However I will go get another new one a size smalller and put on Tomorrow
Thanks

[Zack]

Prolly a bad boost gauge, how does the car feel?

Same thing happened on my last Trilogy car.

[lastdaze04]

try checking the watsegate diaphram on the blower with a vaccum tester. if u pull a vaccum and it holds than its ok, if not than thats causing the low boost allowing it not to build. also check the vaccum lines to the diaphram for swollen end or crackes which will not let the diaphram to open and close correctly.

10.4 roger that, will go and check it out.
Thanks
Rick

[lastdaze04]

Prolly a bad boost gauge, how does the car feel?

Same thing happened on my last Trilogy car.

Like I said in my post everything seems to be working fine, I don't seem to notice any lack of boost. I would think that if I was down 3 to 3 and1/2lbs of boost I would notice it. I have a friend who has is a stangbanger with a boost guage will try his and see what happens
Adam 12 also has a good point will try his out if the boost guage thing does not pan out.
Thanks
Rick

[Adam12]

netime let me know what u find