The exhaust gas recirculation system consists of an EGR valve, a modulator, a switching vacuum valve (VSV) (it is located next to the exhaust manifold) and vacuum hoses. The EGR valve is controlled by vacuum based on signals from the engine control unit.
EGR valve replacement produce as follows:
- remove the throttle assembly;
- disconnect the vacuum hose from the EGR valve;
Pic. 7.26. Location of the EGR valve (EGR)
- disconnect the EGR hose, remove the bolts and remove the EGR valve from the intake manifold (pic. 7.26). If the EGR valve is clogged, replace it, but do not flush in solvent.
Install in the reverse order of removal.
Replacing the EGR vacuum modulator and filter produce as follows:
- mark and disconnect the vacuum hoses from the EGR vacuum modulator. Remove the EGR vacuum modulator from the bracket;
Pic. 7.27. Removing the filter from the EGR modulator
- if the modulator is to be installed again, remove the cover and check the condition of its filters (pic. 7.27);
- clean the filters by blowing them with compressed air. If the filters cannot be cleaned, replace them or the modulator.
Install in the reverse order of removal.
Vacuum valve replacement (VSV) produce as follows:
- disconnect the electrical connector from the VSV valve;
- mark and disconnect vacuum hoses from the VSV valve;
- remove the valve from the bracket.
Install in the reverse order of removal.