Skoda OCTAVIA MK1 Service Manual page 171

xxx rpm xxx mg/s
1 2
Engine speed
Note
As soon as knocking effects are detected, the knock control of the ignition angle must be
deactivated, in order to avoid engine damage.
Note
t Regarding display fields 3 and 4:
t At idling 0.0 °CA is displayed.
Analysis of display groups 015 and 016, display fields 3 and 4 - ignition angle relief
Readout on -V.A.G 1552 -
all of the cylinders between:
8.0...12.0 °CA and of the same
value
one cylinder clearly deviates
from the others
x.x x.
°CA x
°C
A
3 4 ← Display fields
Ignition angle relief cylinder 4 through
knock control
Ignition angle relief cylinder 3 through knock
control
drawn in air mass
Possible cause of fault
Knock sensor
t
defective
Plug connection
t
corroded
Knock sensor not
t
correctly tightened
Component parts
t
on engine loose
t poor fuel quality
t Plug connection
– Testing knock sensor
Slacken knock sensor and tighten
–
again to 20 Nm
– Attach component parts
– Change type of fuel
– Testing knock sensor
171
Specificatio
n
0.0...12.0
°KW
0.0...12.0
°KW
-
760...6350
rpm
Rectifying fault
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→ Chapter
Analysi
s
→ Anch
or
→ Anch
or
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