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EGR Vacuum Line: Testing and Inspection

This article has been updated per manufacturer's TSB #06-13-012


EGR Port Vacuum Check











1. Disconnect the vacuum hose from the throttle body EGR vacuum nipple and connect a hand vacuum pump to the nipple.

2. Start the engine.

3. Measure engine vacuum at 2500 r/min.
Standard value: 51 kPa (15 in. Hg) or more

4. Reset the vacuum pump to "0" (release vacuum).

5. Using a stop watch, measure how long it takes for the vacuum gauge to reach 51 kPa (15 in. Hg) or more.
Standard value: 1.0 second or less

6. If it takes more than 1.0 second for the gauge to reach 51 kPa (15 in. Hg), the EGR vacuum port may be restricted and should be cleaned.
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