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.
Description & Operation
Toyota carburetor models use a Feedback Control (FBC) System. By means of a signal from Oxygen (O2) sensor, carburetor primary side main air bleed and slow air bleed volume are controlled to maintain optimum air-fuel mixture. This reduces HC, CO, and NOx in addition to providing better driveability and fuel economy.
All models use an Electronic Air Bleed Control Valve (EBCV). Two vacuum switches are used on Tercel Wagon models. See Figure and Figure .
NO RELATED
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.