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Home >> Mazda >> 1984 >> 626 DX, 2D Coupe, Standard >> Repair and Diagnosis >> Engine Performance >> System >> EGR System >> Component Testing >> Vacuum Delay Valve >> A/T Vehicles
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A/T Vehicles

NOTE: Note direction of arrow on vacuum delay valve to ensure valve is installed in properly.
  1. Disconnect and remove vacuum delay valve. Connect hand-operated vacuum pump, with gauge, to inlet side of delay valve. Hold thumb over outlet side of delay valve and apply over 19.7 in. Hg vacuum to delay valve.
  2. Release thumb from delay valve and check time required for vacuum reading to decrease from 16.7 in. Hg to 3.9 in. Hg. Specified time should be 1.3-3.3 seconds.
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