Porsche 911 TURBO - 1989 Workshop Manual page 118

Fuel Mixture
REMOVING AND INSTALLING TEMPERATURE CONTROL SWITCH
Removing
Disconnect electric wires, loosen hose clamps
and unscrew the hexagon head bolt.
CHECKING TEMPERATURE CONTROL VALVE
1. Detach vacuum hoses.
2. Blow air into vacuum hose taken off of the
t-adapter by mouth.
3. Valve must not be open when engine is
warm.
Valve must be open at an ambient tempera-
0
ture of less than 20 C.
Removing and Installing Temperature Control ValveChecking
Temperature Control Valve
25 -17
Printed in Germany -II. 1976