Haltech E8 - Manual (Page 40)

Haltech E11/E8 Instruction Manual
Fuel Setup
Figure 35 - Fuel Setup Page
Decel Cut Parameter Group
Deceleration cut is a feature that stops the fuel injectors from injecting fuel when the throttle position is
zero and the engine speed is above the Decel Cut RPM. To ensure that the transition to fuel cut is
smooth, the ignition timing is retarded slightly before the fuel is cut. Likewise, when the fuel is restored,
the injectors resume normal injection and the ignition timing advances back to normal.
• Decel Cut Enable - This check box enables deceleration fuel cut. This feature is primarily used to
save fuel when on a deceleration condition.
• Decel Cut RPM - Fuel is not cut when the engine speed falls below this RPM. Set this RPM to be
above your idle RPM otherwise your engine will stall at idle.
• Decel Cut Temp - Fuel is not cut when the coolant temperature is below this temperature value.
This is useful for cars with an idle up mechanism based on coolant temp that sets the idle speed
above the RPM used for decel fuel cut. This is common in early EFI vehicles with ‘wax pellet’ style
cold idle up.
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