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.
Diverter Valve: Notes
Air flows from air pump into diverter valve. This valve prevents backfiring, by stopping air injection flow during periods of high increase in manifold vacuum (such as during deceleration). Diverter valve dumps air supply to atmosphere for the first few seconds of deceleration.
Most diverter valves also have built-in pressure relief valve, which bleeds off excessive air pump pressure to prevent damage to the system. Most diverter valves are similar. See Figure and Figure . Electric diverter valve is used on GM and Jeep V6 California models and is controlled by the Electronic Control Module (ECM).
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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