I have a THDP with high 18psi actuator. At the moment I have it cranked tight so it can't open. I have a standard HKS wastegate in the crossover pipe with 14psi spring. I am using the grainer bleeder valve going into the side port of HKS and the top port of HKS is open to atmoshphere. Is mabey the sping in the HKS being forced open do to exhaust pressure in the headers? Should I get a 20psi spring.