I was readin on a few forums that you can have a week rubber spot in vaccum lines on the SC which would limit your boost? Still have a boost issue some what if you all remember...

Issue now..running a 2.8 pulley,catless DP,Area tune,60's inject,air box mod

Sometimes it will pull up to 16-17 pounds
Others it will hold that 15 range
In 4th gear prolongin boost it wants to dip down to and hold at 13-14 range

Could i maybe have week rubber? LOL