Vacuum Amplifier, EGR

EGR VACUUM AMPLIFIER
Vacuum gauge between the vacuum amplifier and the red hose from the throttle port, engine at normal operating temperature and at idle, vacuum should be 7 - 20 mbar (.25 - 1.0 in. Hg).
Vacuum gauge between the EGR valve and the yellow hose from the vacuum amplifier, engine at idle, gauge must read 67 - 160 mbar (1.6 - 4.5 in. Hg).