Check & Adjust Boost Pressure
- Connect air pressure gauge in-line between fuel limiter and intake manifold hose. Use a "T" fitting and enough hose so gauge can be carried into passenger compartment.
- Ensure engine is at normal operating temperature. On M/T models, drive vehicle in 3rd gear at about 1500 RPM. On A/T models, place selector in position "2". CAUTION: To prevent damage to brakes, DO NOT apply brakes longer than 5 seconds.
- Press accelerator pedal to floor. On A/T models, DO NOT engage kickdown. Increase engine speed to 3000 RPM, and apply brakes while keeping accelerator pedal down to obtain full load.
- Observe boost pressure on gauge. Maximum boost pressure should be 7.0-8.0 psi (.49-.56 kg/cm 2 ). If boost pressure is incorrect, adjust boost pressure. Go to next step. CAUTION: To prevent damage to wastegate actuator, ensure wastegate actuator rod does not turn when adjusting link rod.
- Remove seal and clip from wastegate actuator link rod. Turn link rod to adjust boost pressure to 7.5 psi (.52 kg/cm 2 ). (Scheme 32)
- Turning link rod one turn will change boost pressure about.5 psi (.03 kg/cm 2 ). Turning link rod clockwise will increase boost pressure; counterclockwise will decrease boost pressure.
Scheme 32
Basic Adjustment Of Pressure Regulator Push Rod
- Remove locking circlip from end of push rod. Connect Pressure Gauge (5230 ) and Pressure Tester (5496 ) to pressure regulator. (Scheme 33) Increase pressure to 7.0-7.8 psi (.49-.54 kg/cm 2 ). Press wastegate lever against turbine housing, closing wastegate valve.
- Adjust push rod length so push rod fits exactly over wastegate valve lever. Install locking circlip, and tighten push rod lock nut. Remove pressure gauge and tester.
Scheme 33
