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How-to » Engine » Emission Control » How to Replace a Mass Air Flow Sensor (Air Mass Meter)
 Note: This is a general guide and may not apply to your vehicle.

How to Replace a Mass Air Flow Sensor (Air Mass Meter)

for the 1980 Ford Mustang Base 8 Cyl 4.2L change
TOOLS
STEPS
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Safety Tip:
Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or closed toe shoes.

1
Open your hood and locate your air intake system.
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2
Loosen the hose clamps that tighten your air filter to the air intake boot in front of the mass air flow (MAF) sensor/air mass meter.
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3
Loosen the hose clamps that hold the mass air flow sensor (MAF) /air mass meter to the intake boot and to the engine. Remove the mass air flow sensor/air mass meter for inspection or replacement.
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4
Inspect the mass air flow sensor/air mass meter wires in a direct light source. Verify dirty build up that would obstruct the engine computer's reading of the air flow. If cleaning (only) is needed - then use a spray (aerosol) cleaner designated / formulated for mass air flow meters. Use of any other type cleaner may damage the sensor.
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Clean the air intake hose - especially on the intake side of the MAF sensor.
5
Install the new or cleaned mass air flow (MAF) sensor/air mass meter unit. Tighten the sensor bolts.
6
Tighten all hose clamps and check the entire air intake system for leaks.
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