FixVault

Fuel Shut-Off

During deceleration, with a closed throttle, fuel delivery will be shut-off by electronic injection control unit. Fuel shut-off is dependent on coolant temperature. Both engine speed cut-off as well as cut-in points are variable. They will be at a higher RPM with low coolant temperature and at a lower RPM with high coolant temperature.

Fig 1: VACUUM SYSTEM SCHEMATIC
G09309360Courtesy of MERCEDES-BENZ USA