SBD 175 BHP / Group N Fuel Injection Management System Kit
For 2.0L LN Engines Distributor Less Type
Part No. GRN 175 - D/less 967E (with optional lambda control)
Please read these instructions in full before attempting to fit your new system.

Notes:

A. Super-unleaded fuel (98 Ron) must be used, otherwise damage MAY occur to engine. do not use normal unleaded fuel or 4 Star

B. The Lambda sensor, on the outlet of the exhaust manifold (Bosch Part Number 0258 003 017) which is standard on Astra/Cavalier/Calibra -can be used for ideal mixture at idle. For an ideal mixture throughout the rev range, a wide range lambda sensor (as used on racecars) can be used. Please quote SBD part number LMBDA-11.

C. The throttle housing must be fitted with a 3 pin throttle potentiometer, Part Number 0280 122 001, no other type is suitable.

D. A digital voltmeter will be required for the set up.

E. The injectors fitted as standard are Bosch part Number. 0280 150 427 (Blue in colour) and a 3.0 BAR fuel regulator fitted.

1. Remove SFI box from under bonnet.

2. Remove old ECU from drivers kick panel & fit new ECU and adaptor loom in its place-attach new to ECU to car using velcro supplied.

3. With ignition on and throttle pot socket disconnected, probe the 3 wires on the loom socket for the throttle pot, 1 of them will be ground the other 2 approximately 5 volts. NOTE the lower voltage wire (this is the signal return to ECU) as this will be used to set the new throttle pot position.

4. The 3 pin throttle potentiometer needs checking to make sure it is giving the correct voltage to the ECU when the throttle butterfly is in the closed position with your digital volt meter connected to the ground and signal wire (and the ignition turned on but with the engine not running ) you should get a reading of 0.500V. If the reading differs from this you will need to adjust the potentiometer. Unfortunately there is only has a small amount of adjustment possible due to the fact that the 2 holes on the mounting brackets that fix it to the throttle housing are not sloted. if you cannot get sufficant adjustment you will need to remove the potentiometer and carefully slot the hole until you have enough movment to acheve 0.500V. Once the reading is correct lock the throttle pot in this position.

5. Remove old idle control valve & replace with modified one, supplied.

6. Re-fit SFIbox

7. Start engine, which may not idle correctly yet, and let engine warm up to normal operating temperature. When engine is at correct temperature, adjust engine revs to. 980 rpm. This is achieved by adjusting screw on modified idle control valve- DO NOT TOUCH THE BUTTERFLY SCREW UNDER ANY CIRCUMSTANCES. TAKE CARE AS ENGINE WILL BE HOT.

Please note that this kit is based on a racing management system. It does not have an automatic idle control valve, your engine may not idle immediatly from cold. For the first couple of minutes you may have to use the throttle pedal to maintain an idle but you may drive your car as normal from start up.

THROTTLE POTENTIOMETER AUTOMATIC SETTING

Group N 175 KIT

The THROTTLE POTENTIOMETER may be set automatically by means of the FAULT LAMP.

THROTTLE SENSOR SETTING ON THE CAR:

In order to replace the Throttle Sensor and to position it accurately on the throttle spindle it is necessary to adhere to the following procedure.

1. Ensure that the closed throttle stop is correctly adjusted, i.e. closed throttle is obtained.

2. Replace the Throttle Sensor as required and connect it to the wiring harness in the normal way.

3. Turn OFF the power to the ECU.

4. PRESS AND HOLD THE FAULT SWITCH WHILST TURNING ON the power to the ECU.

5. Release the FAULT SWITCH.

6. Carefully move the Throttle Sensor until the FAULT LIGHT is OFF. The FAULT LIGHT will remain ON until the sensor is correctly adjusted.

7. Tighten the holding screws.

The Throttle Sensor is now correctly aligned to the throttle spindle.

SB Developments

LIST OF FAULT CODES

CODES DESCRIPTION OF FAULT

2 - 1 Throttle Sensor or wiring to Throttle Sensor

2 - 2 Air Temperature Sensor or wiring to Air Temperature Sensor

2 - 3 Coolant Temperature Sensor or wiring to Coolant Temperature Sensor

2 - 4 Pressure Sensor or wiring to Pressure Sensor (if fitted)

2 - 5 Battery Voltage. This is triggered below 11.5 volts but not during cranking.

3 - 2 Crankshaft Sensor or wiring to Crankshaft Sensor.

Rapid No Faults recorded.

NOTE: After turning ON the power without the engine turning the fault system will show a 3-2 fault. THIS IS NORMAL until the engine has turned.

FAULT LIGHT FLASHING AND FAULT DIAGNOSTICS

The system incorporates a FAULT LIGHT for simple Fault Diagnosis and automatic Throttle Sensor setting.

When the ignition is turned ON and the engine is stationary the FAULT LIGHT is ON. As soon as the engine has started the light will go OFF provided there are no faults detected in the system.

Whilst a fault is detected the FAULT LAMP is ON. If a fault is intermittent then the FAULT LIGHT is only ON whilst the fault is present, i.e. the light will flicker with an intermittent fault. However, the ECU will remember the fault WHILST THE POWER REMAINS ON THE ECU. Once the power is turned off the recorded faults are erased.

Should a fault be present (fault light ON) or suspected, then the FAULT SWITCH should be pressed once and released. The ECU will then flash the codes of all faults which have occurred since the power was last turned on.

If it is wished to erase all recorded faults manually, it is necessary to press and hold the fault switch for approximately 3 seconds. All faults will then be erased, thereby ensuring that should any fault that occurring after this is a true fault.

If there are no faults within the system, or all of the faults have been erased, then a press and release of the Fault Switch will cause the fault lamp to flash rapidly. This is the NO FAULT coded flash.