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.
Electronic Control Carburetor: Description
Subaru models are equipped with either a Carter 1-bbl. or Hitachi 2-bbl. electronically controlled carburetor. These carburetors improve driveability while reducing emissions. An oxygen sensor in the exhaust measures the air/fuel ratio. The sensor creates a signal for the electronic control unit to operate the duty solenoid mounted on or near the carburetor. The system components include: control unit, oxygen sensor, duty solenoid(s), 2 vacuum switches, a thermal switch and a special carburetor.
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:
- • 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.