Exhaust Gas RECIRCULATION (EGR) Vacuum Control Valve (VCV)
Remove EGR VCV. Connect a vacuum pump to EGR VCV port "S" See Fig 1. Plug EGR VCV port "Z". Pump vacuum pump 3 times. On each pump of vacuum pump, vacuum should increase to about 11.8 in. Hg and decrease to about 8.6 in. Hg. After the third pump, vacuum should stabilize at 4.4-7.1 in. Hg. If vacuum is not as specified, replace EGR VCV.