I believe a boost solenoid is now the issue - Re-flashed Stock Tune (was stock before) - Replaced Vacuum Hose (leading from block brake booster) Realized drastic improvement in acceleration - Replaced used updated HPFP w/ 29k miles (new since part 3) - Replaced Crankcase Vent Hose - Added Oil Catch Can - VRSF Inlets - Vargas OE Replacement w/ Upgraded Wastegate Actuator - Custom Valved Exhaust Turbos DME Codes: 2AAF - DME: Fuel pump, plausibility. 2DED - DME: Power management, closed-circuit current violation. 2F6C - DME: Exhaust-gas flap, activation. 30FF - DME: Turbocharger, charge-air pressure too low.