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Electronic (EEGR) EGR Valve

  1. Ensure vacuum system is correctly routed and in serviceable condition. Start engine and ensure there is no vacuum to EGR valve at idle (engine at normal operating temperature). Install a tachometer.
    NOTE: The EVR control solenoid has a small constant vent leak. The vacuum signal to the EGR valve should be less than 2.5 in. Hg at idle.
  2. Disconnect ISC (Air By-pass Valve) connector (MPFI and SEFI engines). Disconnect and plug vacuum supply hose from EGR valve nipple. Ensure engine idle speed is within specification. Using a hand pump, slowly apply 5-10 in. Hg vacuum to EGR valve nipple.
  3. Apply vacuum to the EGR valve. Replace EGR valve if any of the following conditions exist: Engine does not stall. Idle speed does not drop 100 RPM (minimum). Idle speed does not return to normal when vacuum is removed.
  4. Reconnect the ISC connector. Reconnect EGR valve vacuum supply.
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