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Home >> Toyota >> 1994 >> MR2 2.2 S, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Air Induction Systems >> Turbochargers >> Turbo Pressure Check

Turbo Pressure Check

  1. Ensure intake air hoses are connected. Install hose, 3-way connector and pressure gauge between intake manifold and Manifold Absolute Pressure (MAP) sensor. See Figure.
  2. Drive vehicle with engine at 2800 RPM or more with throttle fully open and transaxle in 3rd gear, and note turbo pressure. Turbo pressure should be 7.1-11.8 psi (.50-.83 kg/cm2).
  3. If turbo pressure is less than specified, check intake air and exhaust systems for leaks. If no leaks exist, replace turbocharger. If turbo pressure exceeds specification, check wastegate actuator hose for leaks or cracks. If no leaks or cracks exist, replace turbocharger. Remove test equipment.
NOTE: Ensure MAP sensor and vacuum switching valve are okay. For testing procedures, see ENGINE SENSORS & SWITCHES .
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