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Electronic EGR Valve

  1. Connect vacuum gauge to valve. Start engine. Apply 6-10 in. Hg to EGR valve and hold. Engine speed should drop at least 100 RPM or stall. Vacuum should not drop more than 1 in. Hg in 30 seconds.
  2. Check vacuum lines for correct routing. Disconnect vacuum hose at EGR valve and connect vacuum gauge to hose. Disconnect idle air by-pass valve (1.9L EFI only). Accelerate engine to 2000-2500 RPM and release throttle. Repeat 8-10 times and check for consistent response.
    NOTE: EGR Vent Solenoid (EVRV) allows a small vacuum signal (less than 2.5 in. Hg) at idle.
  3. If vacuum rises above zero with cold engine, EGR valve diaphragm is leaking and valve should be replaced. With engine warm, vacuum should rise above 15 in. Hg and return to zero when throttle is released.
  4. If system does not respond as indicated, test EGR control system. If testing is required, see appropriate COMPONENT TESTING article in the EMISSION section.
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