Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA1991SUPRA L6-3.0L DOHC TURBO (7M-GTE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDESCRIPTION AND OPERATIONAIR/FUEL RATIO (EFI)
1991 Toyota Supra L6-3.0L DOHC Turbo (7M-GTE)
Air/Fuel Ratio (EFI)
1991 Toyota Supra L6-3.0L DOHC Turbo (7M-GTE)SECTION Air/Fuel Ratio (EFI)
Data received by the ECU from the following sensors is used to control injection pulse width:
1. Water Temperature Sensor
2. Engine and Vehicle Speed Sensors
3. Intake Air Volume (Airflow Meter)
4. Throttle Position Sensor
5. Oxygen Sensor
6. Intake Air Temperature Sensor
The duration of the injection pulse width determines the precise air/fuel ratio for the engine under all operating conditions. The extremely fast reaction time of fuel control by the ECU enables the emissions to stay within a very narrow range. This in turn, allows for the use of a three-way catalytic converter on most vehicles.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.