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1974-79 (Ported EGR Valve)

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 1979 Triumph TR8, 1979 Triumph TR7, 1979 Triumph Spitfire, 1978 Triumph TR7, and 1978 Triumph Spitfire. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check vacuum hose for correct routing. Disconnect vacuum hose from base of carburetor. Connect a hand-held vacuum pump to hose. With engine at idle, apply vacuum to EGR valve. If vacuum holds and idle becomes unstable or engine stalls, EGR valve is functioning properly.
  2. With engine at normal operating temperature, connect a vacuum gauge to EGR hose. Increase engine speed to about 2500 RPM. If vacuum is present, system is functioning properly.
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