EGR Valve
With engine off, apply vacuum with hand vacuum pump, then pull off EGR vacuum line while vacuum is applied. The valve should be heard to knock against the insert ring. If no knock is heard, valve is probably seized and should be replaced.
With engine off, apply vacuum with hand vacuum pump, then pull off EGR vacuum line while vacuum is applied. The valve should be heard to knock against the insert ring. If no knock is heard, valve is probably seized and should be replaced.