Porsche 928 Workshop Manual page 386

928
LH-Jetronic
24
Start engine. If injection timing is working correctly, the oscilloscope will display the
following oscillographs.
STARTER SPEED
IDLE SPEED
ACCELERATION
DECELERATION
Note:
If engine does not start or the idle speed drops, exchange test connections on adapter
line and check tester adjustment.
a
Printed in Germany VIII, 1984
Troubleshooting LH-Jetronic
24-117