Not to sure what's wrong,but probally need a new turbo.Well my primary works most of the time,but sometimes i'll smash the gas and hit about 6 lbs on primary than 10-12lbs on the secondary and 14lbs once awhile,but when I start back over in first i have zero lbs of boost and my exhaust sounds different then when booth turbos are working normal.until i hit 4500 rpms then secondary picks up.this zero lbs of boost on my primary well stay like that for awhile,then all sudden i'll have my primary work.It does this every day.Is there anything that could cause the primary to stick.