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.
Exhaust Emission Systems: Description
Control of emissions is accomplished through modification of engine components. The intake manifold has been modified to recirculate exhaust gases to the intake manifold where they mix with the air/fuel mixture and are burned in the combustion chambers. A system is also provided to eliminate vacuum advance in the lower speed ranges, during idling, and during deceleration. A speed sensitive relay is used in conjunction with a magnetic switch to cut off vacuum to the vacuum advance unit of the distributor.
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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