1978 Ford FiestaFACTORY OEM SERVICE PROCEDURE

Thermostatic Air Cleaner: Description: Notes

The air cleaner assembly, used on the Fiesta, is similar to many other units. It is designed to control the temperature of the air entering the carburetor, maintain a constant temperature of this air, and thereby assist in better combustion and lower emissions. The system consists of an air cleaner housing, a sensor inside the housing, a vacuum motor on the snorkel, a door which controls air flow, and necessary connecting tubing.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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