EGR Vacuum Regulator Control System
This system is used on 2.3L engine applications. The system consists of 3 components, a vacuum regulator, EGR valve and a flow control orifice. On EFI models the control chamber pick-up is in the EGR tube and the flow control orifice is integral with upstream EGR tube inlet connector.
On all other models, the control chamber pick-up and orifice are integral with the EGR valve. Regulator receives a vacuum signal to modulate EGR valve using 2 backpressure inlets. One input is standard vehicle backpressure and other is backpressure downstream of flow control orifice.