Porsche 924 Workshop Manual page 152

25
Fuel Mixture
5. Stop by turning valve to position 3 and measure
delivery rate. T est value: 160 to 240 cc/minute.
If measured value is not same as specified value, the
cause is in the fuel distributor. Replace fuel distributor.
924
CHECKING ENTIRE FUEL SYSTEM FOR LEAKS
Note
Check on a warm engine, but not immediately after
engine was run hot.
1. Turn valve to position 2.
2. Turn on ignition. Detach plug on air flow sensor
contact. Fuel pump (s) run.
The fuel pump(s) in cars from 1979 models can be
run by supplying battery voltage to multiple-pin
plug terminal 7 (red/white) with a piece of wire.
The ignition need not be turned on.
25-8 b
Checking Fuel Delivery Rate for Control Pressure Circuit
Checking Entire Fuel System fQr Leaks
Printed in Germany