Product Name: |
FCD2 |
Product Description: |
Fuel Cut Defender |
Product Number: |
TS-0303-1002 |
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ABOUT THIS PRODUCT
Most late model cars have in-built defence mechanisms to guard against increases in boost pressure. Such systems are important but can be an obstacle when increasing boost pressure
The Turbosmart FCD2 will allow boost pressure to be increases above the factory level and prevent momentary shutdown of the fuel injection system.
IMPORTANT NOTES ON YOUR BOOST CONTROLLER
•Once the fuel cut defender has been installed, the factory over-boost fuel cut will no longer operate at the factory level. The boost can now be raised to dangerous levels which can damage your engine if it is not capable of handling higher boost pressures. Be extremely cautious when increasing the boost pressure above the factory level. Seek the advice of your local tuner or performance specialist for further information
•The FCD2 is not waterproof and should not be mounted in the engine compartment.
•The adjustment dials do not turn 360O, they start at 1 and finish at 10. Do not force them past these points as this will damage your FCD2
•Before setup the unit should be set to the following settings, Clamp=10, Release=10.
RECOMMENDATIONS
•Your FCD2 is fitted and tuned by an appropriately qualified technician.
•The Air Fuel (A/F) ratio is checked once the Fuel Cut Defender is set and/or boost pressure is increased.
•Tuning should be performed on a dynamometer
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HOW TO INSTALL YOUR FUEL CUT DEFENDER
BEFORE INSTALLING THE FCD2
It is important to determine if the vehicles electronic control unit (ECU) receives its boost reference signal from the manifold absolute pressure (MAP) sensor or air flow meter (AFM). Failure to connect the FCD2 to the correct sensor could cause severe engine damage. Turbosmart recommends consulting the manufacturer service manuals before installation.
WIRING:
RED Wire: |
Connect to 12V positive supply from ignition switch (not directly from the battery) |
BLACK Wire: |
Connect to Negative supply (earth/ground on vehicle chassis) |
WHITE Wire: |
Connect to MAP sensor or AFM meter output signal wire |
BLUE Wire: |
Connect to ECU boost reference input wire (previously connected to MAP sensor or AFM output) |
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GROUND (NEGATIVE EARTH) |
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12V POSITIVE (SWITCHED |
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BLACK WIRE |
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THROUGH IGNITION) |
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RED WIRE |
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FCD2 |
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BLUE WIRE (FCD OUTPUT) |
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WHITE WIRE (FCD INPUT) |
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ECU
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SENSOR |
CUT HERE |
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MAP sensor |
OUTPUT |
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WIRE |
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ECU INPUT WIRE |
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or AFM |
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YOU MUST CUT THE WIRE FROM THE SENSOR TO
THE ECU. THE FCD2 IS THEN INSTALLED BETWEEN
THE SENSOR AND ECU AS SHOWN
1
HOW TO INSTALL YOUR FUEL CUT DEFENDER cont.
The output wire of your MAP sensor or AFM can be easily located using a digital multimeter or consulting your service manual if not listed. When using a digital multimeter ensure the meter is set to read voltage in the 0-10V range. Place the negative probe of your multimeter on the vehicles chassis and with the car idling, slowly rev the engine. With the positive probe you should be able to read a change in output on one of the wires connected to the MAP sensor or AFM with increasing rpm. Alternatively with ignition switched and engine off, blow air through the AFM or apply pressure to the MAP sensor using a vacuum/pressure source. This should also give a change in voltage on the sensor output wire. Once you have identified the correct wire the wire should be cut and the input and output of the FCD2 should be connected to the wires as shown in the above diagram.
WIRING:
Mount the FCD2 in a suitable location within the cabin using the supplied screws.
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TUNING YOUR FUEL CUT DEFENDER
This view shows the two adjustments on the FCD2.
Green Indicator LED to show when unit is clamping voltage signal
Red Indicator LED to show when unit has released voltage signal
CLAMP DIAL
RELEASE DIAL
The Graph below illustrates the effect of each adjustment dial on the sensor output.
Voltage to |
Voltage from sensor into FCD vs. output voltage from FCD to ECU |
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ECU |
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CLAMP Setting 10 = 5.5V |
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Adjustable |
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“CLAMP” |
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Voltage |
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Clamp voltage |
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level |
CLAMP Setting 1 = 3V |
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“RELEASE” clamping |
Voltage |
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From Sensor |
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voltage adjustment |
RELEASE Setting 10 = 5.5V |
RELEASE Setting 1 = CLAMP Voltage |
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2 |
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SETTING EXAMPLES
These setting examples are to aid in understanding the various settings of the FCD2 and should not be used as a tuning guide. IMPORTANT! See following instructions for tuning your FCD2.
Voltage from sensor into FCD vs. output voltage from FCD to ECU for settings: CLAMP: 1, RELEASE: 6
Voltage to
ECU
“CLAMP” Voltage (3V)
@ Setting 1
Voltage
From
Sensor
“RELEASE” voltage 4.4V @ Setting 6
Voltage from sensor into FCD vs. output voltage from FCD to ECU for settings: CLAMP: 5, RELEASE: 8
Voltage to
ECU
“CLAMP” Voltage (4.1V) @ Setting 5
Voltage
From Sensor
“RELEASE” voltage 4.9V @ Setting 8
For most vehicles the setup is quite simple. On a dyno, bring the engine onto full boost until the factory boost cut is activated, taking note of the boost level at which this occurs. Then turn the clamp adjustment dial on the front of the FCD2 ANTI-CLOCKWISE until the indicator light just illuminates. The GREEN LED indicator light should turn on just before the factory boost cut point. Activating the boost cut defender any earlier than this could cause the engine to run “LEAN” resulting in possible engine damage.
With the clamping level set the release voltage or new cut point can be set. When the release dial is set to 10 the unit will release when the sensor signal reaches 5.5V. If you know the boost level that you want the fuel cut to return with the aid of an assistant, drive the vehicle bringing the engine onto full boost at the maximum boost level you want to run before fuel cut. Then adjust the release dial anticlockwise until the RED LED illuminates and vehicle begins to fuel cut. This dial should be set just above the maximum boost level you require. Check the A/F ratio once the FCD2 has been set.
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