{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"TC","section_name":"Turbocharger System","page":5,"pages_in_section":18,"title":"Troubleshooting","section_header":"Turbocharger System — Troubleshooting","ocr_text":"TURBOCHARGER SYSTEM — Troubleshooting\n\nTROUBLESHOOTING\n\nHINT: Before troubleshooting the turbocharger, first check the engine itself. (Valve clearance, engine compression, ignition timing etc.)\n\nINSUFFICIENT ACCELERATION, LACK OF POWER OR EXCESSIVE FUEL CONSUMPTION\n\n(Possible Cause)\n\n1. TURBOCHARGING PRESSURE TOO LOW\n\n2. RESTRICTED INTAKE AIR SYSTEM\n\n3. LEAK IN INTAKE AIR SYSTEM\n\n4. RESTRICTED EXHAUST SYSTEM\n\n5. LEAK IN EXHAUST SYSTEM\n\n6. ERRATIC TURBOCHARGER OPERATION\n\n(Check Procedure and Correction Method)\n\nCheck turbocharging pressure. (See page TC-8)\nTurbocharging pressure:\nM/T 0.39 — 0.53 kg/cm²\n(5.5 — 7.5 psi, 38 — 52 kPa)\nA/T 0.34 — 0.42 kg/cm²\n(4.8 — 6.0 psi, 33 — 41 kPa)\n\nIf the pressure is below specification, begin diagnosis from item 2.\n\nCheck intake air system, and repair or replace parts as necessary. (See page TC-7)\n\nCheck intake air system, and repair or replace parts as necessary. (See page TC-7)\n\nCheck exhaust system, and repair or replace parts as necessary. (See page TC-7)\n\nCheck exhaust system, and repair or replace parts as necessary. (See page TC-7)\n\nCheck rotation of impeller wheel. If it does not turn or turns with a heavy drag, replace the turbocharger assembly.\n\nCheck plays of turbine shaft. (See page TC-14)\nAxial play: 0.13 mm (0.0051 in.) or less\nRadial play: 0.18 mm (0.0071 in.) or less\n\nIf not within specification, replace the turbocharger assembly.","image":"https://tsrm.sasquatchvc.com/images/mk3/TC/TC_005.png","url":"https://tsrm.sasquatchvc.com/mk3/tsrm/TC/5","prev":{"page":4,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/TC/4","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/4"},"next":{"page":6,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/TC/6","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/6"},"section_url":"https://tsrm.sasquatchvc.com/mk3/tsrm/TC","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/1","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/2","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/3","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/4","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/5","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/6","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/7","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/8","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/9","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/10","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/11","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/12","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/13","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/14","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/15","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/16","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/17","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/TC/18"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}