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the red one following the switchover. In order to facilitate the task, the assistant window
displays the rpm as well as the manifold pressure values saved while running on petrol
(marked with blue colour on the dials). In the event the saved rpm and manifold pressure
values are exceeded, the dials will become backlit in yellow. Lower the multiplier in the
calibrated point, in the event the green injection time indicator, following the switchover,
is situated on the left-hand side of the red indicator (the mixture too rich). Similarly, in
the event the mixture is too weak, the green indicator is situated on the right-hand side.
Increase the multiplier value in such a case. STFT and STFT (red colour) correction values
are frozen in the assistant window following the switchover in order to facilitate the task.
This represents the correction value, which applied in the calibration point just prior to
switchover to LPG. Additionally, following switchover to LPG, on the left-hand side of the
assistant window, an arrow is displayed, which informs the user about the recommended
multiplier correction direction. Following the switchover to LPG by the assistant,
depending on which map is being configured (
LM
or
2D
), the nearest calibration area
point is activated. Pressing “↑” or “↓” causes immediate correction of the same. In order
to verify the multiplier, switchover to petrol and move back to the calibration point.
If necessary, it is possible to add calibration points by clicking the right mouse button on
the multiplier line. The second point along the multiplier line is calculated during the
auto-calibration procedure, while the engine is working at idle run. Having set all the
points in road conditions, also check the point calculated during calibration. Once the
vehicle has stopped, verify its settings and make adjustments, if necessary.
When setting the vehicle based on the injection times, it is a good practice to observe
STFT and LTFT correction indications using the
OBD Monitor
and
Calibration assistant
windows or SXC 1011 diagnostic scanner, in order to verify correctness of the setting.
Press STOP button to discontinue operation of the assistant.
•
Adjustment based on observation of STFT correction
– while driving, when conditions
are stable and the cursor is on the selected point of the map, switchover to LPG and
observe STFT correction indications (using
OBD Monitor
window or SXC 1011 diagnostic
scanner). Set the multiplier point in such a manner as to make sure the correction
oscillates around 0%. In the case of a positive STFT value, elevate the multiplier point,
otherwise lower it. Continue until the required correction is achieved. Once the selected
map point has been set, increase the load to move to the next point (without switching
over) and repeat the above-mentioned actions.
Having initially set up the multiplier map, verify nozzle selection at the maximum load. Check
STFT correction at the maximum petrol injection times recorded, when pulling out with the full
load (the accelerator pedal pushed to the floor). Usually, the correction value should oscillate
around zero. In the event changing the multiplier has no effect and STFT correction remains
positive at all times or the lambda probe works in the weak mixture range, it means that the size
of LPG injector nozzles is too small and larger nozzles should be installed instead. Repeat the
calibration procedure, once the nozzles have been replaced.
Verify additional injections settings once the vehicle has been set up. In
Parameters – Advanced
settings – Extra inj. correction
tab, there is a slide control, which is used to set LPG injectors'
correction in the event additional injections occur. Additional injections are signalled with a
yellow backlit of the
Gas Inj. Dose
window in the
Monitor
window.
