EGR 2 - Check EGR Vacuum at Idle

^ Run engine until normal operating temperature is reached.

^ With engine running at idle, disconnect EGR vacuum supply at the EGR valve and check for a vacuum signal.

NOTE: The EVR solenoid has a constant internal leak. You may notice a small vacuum signal. This signal should be less than 3.4 kPa (1.0 in Hg) at idle.

^ Is EGR vacuum signal less than 3.4 kPa (1.0 in Hg) at Idle?

YES -- Go to EGR3. Pinpoint Tests

NO -- Reconnect EGR vacuum hose. Inspect EVR solenoid for leakage. Run quick test.