FT500 SFI / FT500LITE SFI
58
Fuel tables adjust
Fuel Injection Tables Adjust
Accel fuel enrich and decay
Engine temp. compensation
Intake Air Temp. compensation
MAP TPS
/
compensation
Battery voltage fuel compensation
MAP compensation
-0,90 bar
-15
%
TPS compensation
10 %
+15
%
This table changes according to the main map configuration (MAP
or TPS). When the main fuel table is setup by MAP, this table is a
compensation by TPS. When the main fuel table is setup by TPS, this
compensation is by MAP.
17.11 Prime cranking pulse
This feature improves the engine start by injecting fuel when any crank
trigger tooth is detected, just like OEM ECUs. Usually this table uses
injection times higher than the “engine start” parameter injection times.
Select which fuel bank you want to use for prime pulse and setup its
table by engine temperature.
The injection time is related to engine temperature. The colder the
engine, the bigger the injection time.
17.10 MAP / TPS compensation
Fuel Injection Tables Adjust
MAP TPS
/
compensation
Engine start
Prime cranking pulse
Post-Start enrichment
Battery voltage fuel compensation
17.12 Engine start
This function is essential when starting the engine, as it needs a greater
injection pulse to initiate its operation, especially if the vehicle runs
on ethanol or methanol.
Whenever the RPM drops below 400rpm, the ECU applies start
injection pulses in addition to the idle speed value. This excess of
fuel prevents the engine from failing involuntarily, making it return to
idle speed. Be careful not to exaggerate on injection time, as it may
cause the engine to stall/flood easily.
The engine must always be turned off through the injection system.
Otherwise, if RPM drops below 400rpm and injection is turned on,
the system injects fuel that will not be burned and, therefore, will be
accumulated on the cylinder.
If the engine temperature sensor has not been installed, only the value
from start injection with cold engine is considered.
The bank B option will be only available if enabled on “Injection” menu
on “Engine Settings”
Engine Start 1/3
Ignition timing
on engine start
+ ,75
4
°
17.13 Post-start enrichment
This configuration is a table that relates engine temperature with time
in seconds. This parameter helps stabilizing engine RPM just after start,
improving the idle control especially under low temperature conditions.
Prime injection cranking pulse 1/2
Injectors banks for
prime pulse
Only bank A
Banks A and B
Only bank B
Prime injection cranking pulse 2/2
40 °C
10
ms
Engine Start 2/3
Injectors banks
on crank
Disable cranking fuel
injection when
is over:
TPS
50
%
Only bank A
Banks A and B
Only bank B
Engine Start 3/3
60 °C
1,550
ms
%
+
-
Post-Start enrichment
30,0
°C
60,0
6,00
+15
0
+15
3,50
s
1,00
10,0
+45
+70
+99
+83
+35
+35