EGR Vacuum Regulator Control System
This system is used on most 1.6L and 2.3L engine applications. System consists of 3 components, a vacuum regulator, EGR valve and a flow control orifice. On EFI models, control chamber pickup is in EGR tube and flow control orifice is integral with upstream EGR tube inlet connector.
On all others, control chamber pickup and orifice are integral with 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.