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All Models (Ported EGR Valve)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1979 Opel Opel, 1978 Opel Opel, 1977 Opel Opel, 1976 Opel Opel, and 1974 Opel Manta. However, it is still accessible from the selected car via links, so may be relevant.

Check vacuum hose for correct routing. Warm engine to normal operating temperature. Disconnect vacuum hose from base of carburetor. Connect vacuum hose directly to intake manifold vacuum. Ensure engine runs rough. Reconnect vacuum hose. If system operates as indicated, system is functioning properly.

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