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.
Anti-AFTERBURN Valve
On 1977-78 models, the anti-afterburn valve is located on right side of engine (near carburetor). The valve is connected by tubing to air cleaner, intake manifold and, on some models, to air pump and air control valve. Air is drawn from air cleaner, through anti-afterburn valve, into intake manifold in varying amounts depending on engine requirements. When throttle valve closes, manifold vacuum increases and draws air from anti-afterburn valve directly into intake, by-passing carburetor. This extra induction of air balances the air/fuel mixture and reduces HC emissions.
On 1979 models, the anti-afterburn valve is located between air cleaner and intake manifold, this valve adds fresh air directly to intake manifold from air cleaner to balance air/fuel mixture.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.