SSANGYONG 2004 Rexton 2.7XDi Workshop Manual page 186

DI04-19
The other big difference between the Hoover EGR and EGR controller for DI engine is that from two vacuum modulator,
one is same as being the modulator for EGR valve whereas the Hoover EGR system's the other modulator controls
ALDA of injection pump and the DI engine's the other modulator controls waist gate of the turbo charger.
This difference is in accordance with the difference in fuel injection method where the IDI engine has mechanical
injection system and DI engine is capable of making electronically controlled fuel injection.
In other word, to reduce the amount of the fuel injection in no-load rapid acceleration mode, the IDI engine's Hoover EGR
utilizes solenoid valve to disconnect the connection circuit between intake manifold and ALDA causing negative pres-
sure to occur in the vacuum modulator to reduce the amount of fuel injection. When DI engine, basing input signal from
the related sensors such as acceleration pedal sensor and engine RPM, recognizes that current mode is the no-load
rapid acceleration mode it reduces the amount of fuel injection by sending short electrical signal to the injector. Therefore,
disregarding the modulator for the EGR valve in DI engine, one must keep in mind that the other modulator is used to
control the booster pressure valve in turbo charger.
EXHAUST SYSTEM
CHANGED BY
DI ENG SM - 2004.4 EFFECTIVE DATE
AFFECTED VIN