{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"IG","section_name":"Ignition System","page":3,"pages_in_section":26,"title":"Troubleshooting","section_header":"Ignition System — Troubleshooting","ocr_text":"TROUBLESHOOTING\n\nProblem | Possible causes | Remedy | Page\n\nEngine will not start/hard to start (cranks OK) | Incorrect ignition timing\nIgnition problems\n• Ignition coil\n(7M-GTE)\n• Igniter\n(7M-GE)\n• Distributor\n(7M-GTE)\n• Cam position sensor\n• High-tension cords\nIgnition wiring disconnected or broken | Reset timing\nInspect coil\nInspect igniter\nInspect distributor\nInspect cam position sensor\nInspect high-tension cords\nInspect wiring | IG-20\nIG-9 or 12\nIG-15\nIG-9\nIG-16\nIG-6 or 11\n\nRough idle or stalls | Spark plugs faulty\nIgnition wiring faulty\nIncorrect ignition timing\nIgnition problems\n• Ignition coil\n(7M-GTE)\n• Igniter\n(7M-GE)\n• Distributor\n(7M-GTE)\n• Cam position sensor\n• High-tension cords | Inspect plugs\nInspect wiring\nReset timing\nInspect coil\nInspect igniter\nInspect distributor\nInspect cam position sensor\nInspect high-tension cords | IG-7\nIG-20\nIG-9 or 12\nIG-15\nIG-9\nIG-16\nIG-6 or 11\n\nEngine hesitates/poor acceleration | Spark plugs faulty\nIgnition wiring faulty\nIncorrect ignition timing | Inspect plugs\nInspect wiring\nReset timing | IG-7\nIG-20\n\nMuffler explosion (after fires all the time | Incorrect ignition timing | Reset timing | IG-20\n\nEngine backfires | Incorrect ignition timing | Reset timing | IG-20\n\nPoor fuel economy | Spark plugs faulty\nIncorrect ignition timing | Inspect plugs\nReset timing | IG-7\nIG-20\n\nEngine overheats | Incorrect ignition timing | Reset timing | IG-20","image":"https://tsrm.sasquatchvc.com/images/mk3/IG/IG_003.png","url":"https://tsrm.sasquatchvc.com/mk3/tsrm/IG/3","prev":{"page":2,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/IG/2","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/2"},"next":{"page":4,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/IG/4","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/4"},"section_url":"https://tsrm.sasquatchvc.com/mk3/tsrm/IG","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/1","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/2","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/3","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/4","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/5","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/6","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/7","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/8","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/9","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/10","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/11","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/12","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/13","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/14","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/15","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/16","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/17","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/18","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/19","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/20","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/21","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/22","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/23","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/24","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/25","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/IG/26"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}