Intake Charge Pressure Check

WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Removing the black hose from the No.1 turbocharger wastegate solenoid or the brown connector, install the pressure gauge to this hose. Cap the nipple of solenoid after removing the black hose.

Fig 1: Identifying Turbocharger Wastegate Solenoid (No.1)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Disconnect the black connector of No.2 turbocharger wastegate solenoid.

Fig 2: Identifying Turbocharger Wastegate Solenoid (No.2)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

When the engine speed reaches approximately 3000r/min or more with the throttle fully opened in the second gear, measure the boost pressure.
Standard value: 85 - 159kPa (12.4 - 23.0 psi)
If the boost pressure is lower than the standard, check the following possible causes.
1. Turbocharger wastegate actuator malfunction
2. Boost pressure leakage
3. Turbocharger malfunction
If the boost pressure is higher than the standard, check on the following areas because the boost pressure control might be abnormal.
1. Turbocharger wastegate actuator malfunction
2. Wastegate regulating valve malfunction
3. Rubber hose of turbocharger wastegate actuator disconnected or cracked
Connect the black connector of No.2 turbocharger wastegate solenoid.

Fig 3: Identifying Turbocharger Wastegate Solenoid (No.2)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
If the diagnostic trouble code is stored during the check, use scan tool MB991958 to eliminate the diagnosis code.

Fig 4: Identifying Scan Tool MB991958 And Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.