S4 Quattro Wagon V8-4.2L (BHF) (2008)
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Air Injection Control Valve: Testing and Inspection
Secondary Air Injection Combination Valve, Checking for Function and Leaks
Secondary Air Injection Combination Valve, Checking for Function and Leaks
Special tools, testers and auxiliary items required
‹› Hand vacuum pump (VAS 6213)
Test Conditions
‹› Vacuum lines and hose connections free of leaks.
‹› Vacuum lines not plugged.
Test Sequence
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Remove rear engine cover - arrows -.
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Remove cover - 1 - in engine compartment (right side).
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Disengage Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) - 1 - from air guide.
