EG–142 ENGINE – TURBOCHARGER SYSTEM (2JZ-GTE) TROUBLESHOOTING HINT: Before troubleshooting the turbocharger, first check the engine itself. (Valve clearance, engine compression, ignition timing etc.) INSUFFICIENT ACCELERATION, LACK OF POWER OR EXCESSIVE FUEL CONSUMPTION (Possible Cause) Check Procedure and Correction Method) 1. TURBOCHARGING PRESSURE TOO LOW Check turbocharging pressure. (See page EG–144) Turbocharging pressure: 61–75 kPa (062–0.76 kgf/cm2, 8.8–10.8 psi) If the pressure is below specifications, begin diagnosis from item 2. 2. RESTRICTED INTAKE SYSTEM Check intake air system, and repair or replace parts as necessary. (See page EG–144) 3. LEAK IN INTAKE AIR SYSTEM Check intake air system, and repair or replace parts as necessary. (See page EG–144) 4. RESTRICTED EXHAUST SYSTEM Check intake air system, and repair or replace parts as necessary. (See page EG–144) 5. LEAK IN EXHAUST SYSTEM Check intake air system, and repair or replace parts as necessary. (See page EG–144) 6. ERRATIC TURBOCHARGER OPERATION Check rotation of turbine shaft. If it does not turn or turns with a heavy drag, replace the turbocharger assembly. Check axial and radial play of turbine shaft. (See page EG–158) Maximum axial play : 0.110 mm (0.0045 in.) Maximum radial play : 0.162 mm (0.0064 in.) If the play is greater than maximum, replace the turbocharger assembly.