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Tec3r Manual Version 1.11
- Page 75 -
©2017 Electromotive, Inc.
Constant Twenty Second Starting Enrichment (ASE 1):
This enrichment adds extra fuel for a
period of 20 seconds after the engine has been started. The enrichment value entered here is added to
the “VE Absolute” value.
Fuel Pump Turn-On Time
Set Constant for the Fuel Pump Turn-On Time:
This feature is used to turn the fuel pump on
when the ignition is turned on. The fuel pump will run for the specified number of seconds, or until
engine cranking occurs. Use this value to prime your fuel system.
D.4.k. Battery Voltage Compensation
Fuel injectors generally require a longer pulse width at low battery voltage. Low battery voltages
cannot move the injector pintle as quickly as normal battery voltages, which thereby creates a lean condition
during low voltage operation. The amount of fuel enrichment that is needed for low battery voltage is
usually very small.
Parameter BT0 (Injector Pulse Width Compensation for Low Battery Voltage) sets the amount of
additional pulse width that is used for low battery voltages. BT0 does not add pulse width until battery
voltage drops below 12 volts. Once this occurs, it will add pulse width to the “TFPW” value.
Low resistance injectors do not suffer from the same low battery voltage effects as high resistance
injectors.
High resistance injectors should not need BT0 to be set higher the 360
s/volt,
while
low
resistance injectors should not need BT0 to be set higher than 180
s/volt.
Note that 1000
seconds =
1milliseconds. As such, a 360
s/volt setting on BT0 would add 0.360 milliseconds to the injector pulse
width when the battery is at 11 volts.
The battery voltage parameter allow the
Tec3r
to adjust the injector open times up or down to
compensate for low or high battery voltages. The value specifies how many microseconds to add or subtract
to calculated open time based on the current battery voltage. The compensation value is specified in
microseconds per volt. When the voltage is at 10 volts (2 volts low), and value in the software voltage
compensation specifies 65 microseconds per volt, the value added to the final injector pulse time will be 130
microseconds (65 microseconds per volt x 2 volts low).
1 ms = 1000 microseconds, so 65 microseconds = .065 ms.
If the voltage varies more than between 8 and 16 volts, an additional battery, additional alternator, or a more
powerful replacement alternator should be considered.
D.4.l. Deceleration Fuel Cut-Off
When an engine is rapidly decelerating, injected fuel will often cause backfiring through the exhaust.
This occurs because the engine is not using much air or fuel, so any excess injected fuel hits the exhaust
manifold and ignites. To eliminate this situation, the Deceleration Fuel Cut-Off allows the injectors to be
turned off when the throttle is closed quickly.
A few factors control the fuel cut-off:
Deceleration Fuel Cut-Off Activation:
This parameter defines whether or not the TEC will go into
Deceleration Fuel Cut-Off mode. Turn this ON to enable the fuel cut-off.
RPM Limits of Activation
Cold RPM Above Which DECEL Activates (DCCL0):
This is the RPM above which the
Deceleration Fuel Cut-Off mode is active when the coolant temperature is –40C. When above –40C,
the RPM above which the Fuel Cut-Off is active is determined by drawing a straight line from
