Porsche 928 Workshop Manual page 449

25
Fuel System
928
0
CHECKING SYSTEM PRESSURE
CHECKING CONTROL PRESSURE "WARM"
1. Connect and bleed pressure tester VW 1318.
Engine could be cold or warm for this test
2. Bridge safety circuit.
1. Connect and bleed pressure tester VW 1318.
3. Set lever to closed valve position.
2. Electric wire plug remains connected on control
pressure regulator.
3. Bridge safety circuit.
4. Set lever to opened valve position. Control
pressure will now rise slowly and reach the
specified value when control pressure regulator
has been operated. Operating time will vary
depending on ambient temperature.
4. System pressure should now agree with
specifications.
a
25.12f
Checking System Pressure
Printed in Germany
Checking Control Pressure 'Warm"