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 MANUALSSUBARU1998LEGACY OUTBACK SPORT AWD F4-2.2L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSAIR FLOW METER/SENSORDESCRIPTION AND OPERATION
1998 Subaru Legacy Outback Sport AWD F4-2.2L SOHC
Air Flow Meter/Sensor: Description and Operation
1998 Subaru Legacy Outback Sport AWD F4-2.2L SOHCSECTION Description and Operation
PURPOSE/OPERATION
- The Multipoint Fuel Injection (MFI) system employs a hot-film type mass air flow sensor. This mass air flow sensor converts the amount of air taken into the engine into an electric signal by utilizing the heat transfer phenomenon between the incoming air and a heating resistor (hot film) located in the air intake.
- The features of this flow sensor type are as follows:
1. High-altitude compensation is made automatically.
2. Quick response.
3. These are no moving parts.
4. They are compact.
- The Multipoint Fuel Injection (MFI) system employs a hot-film type mass air flow sensor. This mass air flow sensor converts the amount of air taken into the engine into an electric signal by utilizing the heat transfer phenomenon between the incoming air and a heating resistor (hot film) located in the air intake.
- The features of this flow sensor type are as follows:
1. High-altitude compensation is made automatically.
2. Quick response.
3. These are no moving parts.
4. They are compact.
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.