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Home >> Chevrolet >> 1981 >> Luv 2.2L Eng VIN S, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Gas RECIRCULATION >> Testing >> EGR Valve

EGR Valve

  1. Detach vacuum hose from EGR valve and connect an outside vacuum source, such as hand pump with gauge. Apply about 4 in. Hg and hold this level. Vacuum should not leak down.
  2. While applying vacuum, watch movement of valve stem. At 4.7 in. Hg (Federal Man. Trans.) or 3.9 in. Hg (all others), stem should move diaphragm to full up position. If valve does not respond as indicated, replace it.
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