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.
Air Suction System: Description
Air suction system uses exhaust gas pulses to draw air into the exhaust manifold or catalytic converter to help complete oxidation of emissions. See Figure- Figure. The air suction system on California Pickup (Carbureted) models is computer controlled and therefore is closely tied with the carburetor/fuel feedback control system. See Figure- Figure . See appropriate CEC article in the COMPUTERIZED ENGINE CONTROLS section. for information and testing of vehicle speed sensor, temperature switches, and oxygen sensor.
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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.