I'm having the same problem as Spooly....If removing the vac line from the housing enables you to get more boost, then it's a solenoid problem, huh? Is this solenoid an easy to get part from Napa, or will I be ordering this from freakin' Beijing?forzfed:
Check the headers for any major cracks. Check to see if you have a plugged cat. Check the boost seloniod on the passenger valve cover. For a quick test you could pull the vac line off the compressor housing of the turbo. But be cautious because boost can hit 30psi so just step into it slowly to see if if boosts more and do not floor it. One more thing, you do have a proper boost gauge and not the led one, right?