Porsche 928 Workshop Manual page 549

28
Ignition System 928
TESTING
CONDTIONS
Engine in perfect mechanical
condition.
Battery charged.
Starter turning.
See Test Point
Engine does not start
Engine hard to start
Erratic idling
Poor engine pickup
Engine misfiring
High fuel consumption
Poor engine output
Engine hesitation
Engine knocks when accelerating
POSSIBLE CAUSES OF DEFECTS
1 2 3 4 5 6 7 8 9 10
X x x X X
X X X X
X X
X
X x x x
x x x
x x
X
X
x x x
X
xxxxxxx
x x x x X
x x
X
x x X
X = Check with suitable tester
28 - 52
Troubleshooting Electronic Ignition System hinted in Germany