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Home >> Mazda >> 1989 >> B2600i Base >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests - CARBURETED >> Emission Systems & Sub-Systems >> EGR System >> EGR Control Valve
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EGR Control Valve

  1. Warm engine to normal operating temperature. Run engine at idle. Disconnect EGR control valve vacuum hose and plug hose. If engine does not idle smoothly, clean exhaust gas passage in EGR valve or replace EGR valve as necessary. Before replacing EGR valve, check intake air and control systems.
  2. Connect vacuum pump and apply 1.6-2.4 in. Hg to EGR valve. If engine does not run rough or stall, check EGR passage for blockage or replace EGR valve as necessary.
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