Vauxhall Workshop Service and Repair Manuals

Coasting Air Valve (Vacuum Control), Check and Adjust

Detach control vacuum hose from coasting air valve.

Connect Vacuum Pump MKM-667 and de-pressurize valve.

Switching point at approx. 630 mbar vacuum.

With a vacuum of approx. 630 mbar, switching is audible.

In case of deviation from nominal value, change adjustment of coasting air valve on adjustment screw until the above values are achieved.

Disconnect vacuum pump from vacuum connection and attach vacuum hose.