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indicates that changing over can be
possible at RPM lower than 4000
and with a MAP value close to the
idle speed one.
- "Changing over in deceleration"
indicates that changing over can be
possible in deceleration conditions,
that is to say with RPM ranging
between 2000 and 4000 and a
MAP value close to the idle speed
one. In these conditions the torque
required to the engine is practically
null; this obviously allows avoiding
jerks during this phase. (This chan-
ging over is very similar to the
Flying Injection system). Changing
over in deceleration is suitable for
vehicles whose OBD detects miss-
fires. On these vehicles, petrol-gas
changing over and gas-petrol chan-
ging back are particularly delicate
and they are therefore recommen-
ded only in deceleration conditions.
(NOTE: the manual action on the
changeover switch has anyway
priority on the software; by forcing
the changeover switch on its petrol
mode the gas-petrol changing over
is therefore immediate even if the
changing over in deceleration is
configured in the software).
- "Always changing over" indicates
that changing over is possible in all
conditions and therefore at any
RPM and engine load values.
The standard configurations are:
- Petrol-Gas changing over (Box 1
of Pict. 11): changing over in dece-
leration
- Gas-Petrol changing over (Box 2
of Pict. 11): always changing over
In the "Changing back to petrol for
lack of gas" Box there are all the
parameters controlling this function.
They are the same parameters
already seen for the Standard
Sequent and Sequent FAST. Every
time a new mapping is created,
some given values are already con-
figured; normally they do not need
any modification.
Pict. 11
Pict. 12
The "Changing back to petrol at the
idle speed" Box allows changing
back to petrol every time the engine
is below certain revs; this function
is identical with the Sequent one
and is only used on vehicles whose
return to idle speed is so critical
that it can provoke the engine stall
as a consequence.
4.2 SELF-MAPPING
The self-mapping can be carried
out from the tune-up function too.
The procedure is the same as the
assisted personalised one. The
only novelty is the initial question
9
(Pict. 12) asking the installer to
decide whether self-mapping from
the CURRENT MAP, that is the one
already existing in the ECU or from
the BASIC MAP, that is by using
the standard maps existing on the
PC.
WARNING: It is necessary to
connect the manifold pressu-
re.
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