Fast 30400-KIT-EZ-EF, Инструкция по эксплуатации

Страница: 37 / 70

37
Engine Parameters
To adjust a setting, touch the Engine Cubic Inches, Idle RPM or Rev Limit textbox. Then enter
desired numbers on the keypad and press Ent. The value will be sent to the selected textbox.

Number of cylinders – Choose from 4, 6, or 8. The button’s LED will indicate selection.

Engine Cubic Inches – To convert from liters to cubic inches use the following formula:
61.0237
.

Idle RPM – The target idle speed maintained by the IAC motor, and by idle timing trim if the
EZ-EFI
®
is controlling ignition timing and the idle timing trim feature is enabled.
Some engines like to idle higher than others. This setting allows you to easily try different idle
speeds to see what works best for yours. Keep in mind that this is setting the idle speed for a
fully warmed-up engine. If the engine is cold, the ECU will try to maintain a slightly higher
idle than called for here. If you return to this setting from the Advanced menu and make large
changes, you may want to use the IAC Calibration option (also accessed through the Advanced
menu). This will help you adjust the resting position of the throttle blades so that the idle motor
is operating in the preferred range.
Keep in mind that once the idle motor is in its fully closed position (the Live Dashes show IAC
at 5), it cannot bring the idle speed down any further no matter what setting is entered here. If
this happens, you will need to adjust the idle screw on the throttle body to close the blades
more. (Again, you’ll want to use the IAC Calibration option afterwards.) The other extreme is
if the Live Dashes show IAC at 180. At that point, the idle motor is fully open and is unable to
let any more air into the engine to raise the idle speed.
If for some reason an IAC is not being used in a custom application, the Idle RPM setting is
still important. Besides serving as a target for the IAC (and idle timing trim if applicable) to
maintain, this setting also helps the ECU determine when the engine is idling. For an
application without an IAC, set
Idle RPM to match the engine’s actual idle speed.