- 40 -
Maintenance
B
Adjustment of carbon oxide rate (CO)
CO ADJUSTMENT IS NOT REQUIRED.
The system can correct its (stoichiometric) carburetion
through the Lambda probe control. This does not hap-
pen straightaway but depends on the Lambda probe
switching speed for a water temperature of 85 to 105 °C.
You will notice that, when the Lambda probe % con-
troller work slightly ABOVE ZERO, the GAINADATTI-
VO setting WILL INCREASE and will bring the Lambda
% channel back to about 0 ±3%.
You will notice that, when the Lambda probe % con-
troller work slightly BELOW ZERO, the GAINADATTI-
VO setting WILL DECREASE and will bring the
Lambda % channel back to about 0 ±3%.
The number of engine revs at idling should be kept at
the following values:
IDEAL 1150 rpm (min 1100 - max 1200)
The system is able to balance engine running around
the target speed 1150 rpm - 50 rpm acting automati-
cally on the ignition advance.
It is however necessary to adjust the air flow as outli-
ned below without unbalancing the throttle body pai-
ring just carried out:
If the "Advance Correction" channel is NEGATIVE,
remove air by closing the by-pass
, maintaining pairing
until the "Advance Correction" parameter positions for
work in a field between -4° and + 4° (the optimal con-
dition is reached when the working parameter is close
to zero).
If the "Advance Correction" channel is POSITIVE, add
air by opening the by-pass, maintaining pairing until
the "Advance Correction" parameter positions for work
in a field between -4° and +4° (the optimal condition is
reached when the working parameter is close to zero).
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