Service manual

© 2002 Cannondale Corporation - All Rights Reserved
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Electrical_EFI Service Manual.fm
at the closed position.
Typical values are from 0.0 to 1.0%
•“Injector Flow Rate”
(Input range 1500 - 3000)
Typical values are from 2300-2800
The fuel injectors’ flow rate, used by the ECU to convert fuel mass in milligrams to injector pulse width in
milliseconds. The lower the flow rate, the longer the ECU has to hold the injector open to deliver a given fuel
mass. For a set of injectors, using a lower flow rate setting will deliver more fuel (richer running), and using a
higher flow rate setting will deliver less fuel (leaner running).
•“Injector Offset”
(Input range 0.3 - 1.6)
Typical values are from 0.5 to 1.5
The amount of “dead” time of the fuel injector. The fuel injector is an electro-mechanical device, and there is
a delay from the time the electrical signal to open is delivered until the mechanical parts move and allow fuel
to flow. This delay time is added to all pulse widths. In low fuel delivery situations, the injector offset can be
the majority of the pulse width, so the proper value is important to maintain the proper amount of fuel at low
throttle openings. Using a higher injector offset will deliver more fuel (richer running), and using a lower
injector offset will deliver less fuel (leaner running).
To update calibrations, start by connecting the interface cable to the computer and vehicle.
To update calibrations
1. Click the “UPDATE Calibrations” button.
2. Click in the appropriate field in the window and type in the calibration (variable) values.
3. Click “OK” and the typed-in values will display in the CDMT main window. Now, you have to send these values
to the ECU for them to take effect. Click the “SEND Calibration File (to ECU)” button.