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1994-96 All Except 2.5L (VIN B)

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  1. Ensure all vacuum hoses are correctly routed and securely attached. Replace any crimped or broken hoses. Ensure less than one in. Hg vacuum to EGR valve exists at idle with engine at normal operating temperature.
    NOTE: EVR solenoid has a continuous internal leak which produces a vacuum signal of less than one in. Hg at idle.
  2. Install tachometer. Disconnect idle air by-pass valve electrical connector (if equipped). Remove and plug vacuum hose at EGR valve. Ensure transmission is in Neutral. Start and operate engine at idle. Note idle speed. Using vacuum pump, apply 5-10 in. Hg to EGR valve. When vacuum is fully applied to EGR, one or more of following should occur:
    • Engine should stall.
    • Idle speed should drop greater than 100 RPM.
    • Idle speed should return to normal when vacuum is released.
  3. Repair or replace EGR valve if engine does not respond as specified. Reconnect idle air by-pass valve electrical connector. Unplug and reconnect vacuum hose at EGR valve.
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