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.
Feedback Carburetor System: Description
The computer controlled emission system uses sensors located throughout the vehicle to collect information. This information is fed to an ECM. The ECM uses the information to correctly adjust the pulse air control, fuel-cut, idle-up and bowl vent systems, EGR system and secondary throttle system, as well as feedback system. The ECM is located behind the glove box.
The ECM receives the following inputs: engine speed, throttle position, exhaust oxygen concentration, engine coolant temperature, clutch engagement, electric load (from headlights, coolant fan, rear defogger and heater fan), altitude compensation and engine compartment air temperature. See Fig 1 .
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.
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