Lucas 4CU ECU remanufactured and upgraded with tornado software
Tornado
$999.99
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Tornado
Lucas 4CU ECU remanufactured and upgraded with tornado software
LUCAS 4CU. TWS remanufactured and upgraded ECU w/ tornado software. Individually calibrated and tested for 24 hours.
Offers 10-15bhp and 10-15% fuel economy with a healthy engine
These can be reconfigured to suit 3.9 4.0 4.2 4.6 4.8 5.0 liter and to run the larger Jaguar air flow meter
Quality unit with a 3 year parts and labor warranty transferable if you sell your vehicle. This product is one of over 2000 units sold (0.002% failure rate under warranty).
You will need to increase your total timing as well, to run 28-30° at 4000 rpms.
Includes 4 wire o2 sensors Bosch 0258986505
o2 Sensor Wiring
- O2 sensor has four wires, black, grey, and two white ones. The two white ones are the heater, which is not polarity conscious. Grey is the sensing element ground, and black is the sensor signal.
- Black sensor signal connects straight to the existing sensor connection. The grey and one of the whites need to be taken individually all the way to the 4CU system common earth on the back of the cylinder head. They must not be joined anywhere before that common earth, so the will be two separate earth's for each sensor, giving a total of four new wires at the earth.
- The other white heater wire is used to supply +12V whilst the fuel pump is running. The fuel pump relay has two terminal 87, one is in the center contact which is vacant. You can insert a receptacle into the center position of the fuel pump relay, and use that to feed both heaters.
- The reason the sensor and heater grounds have to be separated is that there is a significant current flowing down the heater ground, which will produce a variable voltage gradient according to how much power they need (constantly varies), which is enough to mess up the sensor reading.
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