I detailed my engine last week and since then I've only been able to get 7psi. I've got a stg2 comp and was consistently spiking 15psi. I tested the wastegate solenoid and it works, then I pulled the vacuum hose to the wastegate, took it for a drive and it boosted as expected, like mad. I let off after 14psi so I don't think it's anything mechanical. There are no codes other than 12 which I think is typical of the MP computers. I'm almost certain it's electrical but there's no real signs to suggest anything else. Anyone have any thoughts?