EGR Control Valve Tests

Remove EGR valve and check that vacuum line is not deformed, replace if necessary. Apply 6 in. (152 mm) of vacuum to EGR control valve. Valve should move to full up position. With vacuum pinched off, control valve should remain in up position for more than 30 seconds. Visually check control valve and if necessary clean valve and valve seat with a soft wire brush. Check for good seal between valve and valve seat. If valve does not perform as indicated above, replace valve as unit cannot be disassembled.