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Home >> Mazda >> 1995 >> 929 >> Repair and Diagnosis >> Engine Performance >> System >> EGR Function Testing >> Testing >> EGR Valve - Piston Engines (W/Single Or Dual Valves) >> Notes

EGR Valve - Piston Engines (W/Single Or Dual Valves): Notes

  1. Check vacuum lines for correct routing. Disconnect vacuum hose at EGR valve, and plug hose end. Connect vacuum pump to valve. Start engine. Apply 6-10 in. Hg to valve and hold.
  2. Engine speed should drop at least 100 RPM or engine should stall. Vacuum should not drop more than one in. Hg in 30 seconds. Reconnect EGR vacuum hose.
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