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Home >> Chrysler >> 1983 >> E Class 2.2 C >> Repair and Diagnosis >> Engine Performance >> System >> EGR System >> Trouble Shooting >> EGR Valve Stem Does Not Move On System Test, But Operates Normally On External Vacuum Source

EGR Valve Stem Does Not Move On System Test, But Operates Normally On External Vacuum Source

  1. Disconnect CCEGR valve and by-pass valve with a short length of 3/16" tubing. If normal movement of EGR valve is restored, replace CCEGR valve.
  2. On venturi vacuum type systems, disconnect Orange and Blue (or unstriped) hoses at time delay solenoid valve and by-pass valve with at short piece of tubing.
  3. If normal EGR valve stem movement is restored, reconnect hoses to valve and disconnect electrical plug from solenoid. If EGR valve stem does not move, solenoid should be replaced.
  4. If solenoid does move, timer should be further tested as previously described.
  5. If plugged passages are suspected with the ported vacuum type system, carburetor should be removed and slots inspected and cleaned as necessary. Recheck for normal EGR operation.
  6. If plugged passages are suspected with the venturi vacuum system, carburetor cleaner should be used to clean deposits from venturi passage. Use light air pressure to verify that passage is clean.
  7. To check for defective vacuum amplifier (venturi vacuum systems), remove venturi vacuum signal hose from carburetor. With engine at idle, apply approximately 2 in. Hg vacuum to the signal hose.
  8. Engine speed should drop at least 150 RPM and EGR valve stem should move 1/8" (3 mm) or more. If not, replace vacuum amplifier.
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