With New Generation Star (NGS) Scan Tool
- Ensure engine is at normal operating temperature. Connect NGS scan tool to Data Link Connector (DLC). Turn A/C off. Using scan tool, access MGP PID from PID/DATA monitor menu. See ADDITIONAL SYSTEM FUNCTIONS in TESTS W/CODES - 7.3L DIESEL article.
- Observe PID reading and road test vehicle. Accelerate vehicle to achieve highest boost level (2500-3500 RPM). Note PID reading. Boost level will level out after 3000 RPM. If PID reading is 13 psi (90 kPa) or more, boost level is okay. If boost level is not okay, see DIAGNOSTIC AIDS.