I threw a 15g kit on my 98 Civic EX. I am having problems with it holding boost. With the rod at stock length, it will boost up about 4 psi and then drop down to 3psi. Ive tightened it up several rounds, and it will boost up to about 5-6psi and then drop to 4. Is this a common problem with the stock greddy actuator? I am running a FMIC and 2.5" piping, and the wastegate is connected directly to the compressor housing nipple.