Hyundai Coupes/Sedans 1986-1993 Repair Guide

EGR Valve

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TESTING



See Figure 1

  1. Remove the EGR valve and check it for sticking or carbon deposits. Clean the valve with solvent and ensure that the valve is fully seated on the contact surface.
  2.  
  3. Connect a hand vacuum pump to the valve and apply 19.4 in. HG of vacuum. Check that vacuum is held.
  4.  
  5. Release the vacuum and apply 1.7 in. Hg of vacuum. Blow air into one passage of the valve. Air should not blow through.
  6.  
  7. Increase the vacuum to 7.5 in. Hg and blow air into the passage again. Air should blow through.
  8.  
  9. Replace the EGR valve if it fails to function properly.
  10.  
  11. Install the EGR valve using a new gasket. Tighten the bolts to 11-16 ft. lbs. (15-22 Nm) on 4 cylinder engines or 14-20 ft. lbs. (19-28 Nm) on V6 engines.
  12.  



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Fig. Fig. 1: EGR valve test on fuel injected models

 
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