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.
1990 Plymouth Laser Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Airflow Sensor
- Airflow sensor is located inside air cleaner assembly. Disconnect airflow sensor electrical connector. Using an ohmmeter, measure resistance between airflow sensor terminals No. 4 and 6 (non-turbo models) or No. 6 and 8 (turbo models). See Fig 1 .
- Resistance should be approximately 6000 ohms at 32°F (0°C), 2700 ohms at 68°F (20°C) and 400 ohms at 176°F (80°C). Note that as temperature increases resistance decreases.
- If airflow sensor resistance is not as specified, or if resistance remains unchanged, replace airflow sensor.
Factory Service Tools
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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.
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