[1] The system was also paired with the Rover V8 by a number of low-volume manufacturers such as TVR, Marcos, Ginetta, and Morgan.

The engine control unit (ECU) of the 14CUX system is run by a Motorola MC6803U4 8-bit microprocessor, which is an uncommon variant of the otherwise ubiquitous 6803.

When the ignition is switched off, the ECU winds the bypass valve fully open to provide enough air the next time the engine is started.

Two factors (crankshaft speed and engine load) are used to index into a two-dimensional matrix of numeric values known as the "fuel map".

This external map selection was disabled in the code for North American specification (NAS) vehicles.

The design of the 14CUX was done well in advance of the requirement (for the 1996 model year) that all passenger vehicles sold in the United States support OBD-II.

In lieu of an industry-standard diagnostic interface, the 14CUX is able to communicate over a serial link at non-standard voltage levels and baud rate.

The serial interface allows reading and writing arbitrary memory locations via a simple software protocol.

When connected to the 14CUX wiring harness, the ECU detects its presence and reconfigures the RDATA and TDATA lines to work as an I2C link to this device.

For model year 1996, Land Rover chose to discontinue use of the 14CUX in its products and instead used GEMS ("Generic Engine Management System"), which had been developed jointly by Lucas and SAGEM.

Some automakers whose products were not exported to North America (such as TVR) continued to use the 14CUX until the later discontinuation of the Rover V8 engine.