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14CUX ECU DIAGNOSTIC CABLE SERIAL
Exploration of the 14CUX firmware has also uncovered a software protocol that can be used to communicate with the ECU and retrieve diagnostic information over its serial link. The purpose of this project is to explore and document the internal function of the 14CUX. Fuel maps can be modified to increase power at the expense of fuel economy. Engines being tuned for motorsport have different performance requirements than those that were designed for road use.Appropriate fuel maps could be used to allow retrofitting the 14CUX system to later Rover V8 configurations - these may include the 4.0L and 4.6L units, which were sold in the United States with a different engine management system after the 14CUX had been discontinued. The fuel maps are usually specific to a particular engine displacement a 3.5L fuel map will not work well with a 5.0L engine.There are at least two reasons that a person may want to design a custom fuel map: The fuel maps stored in the 14CUX each represent a two-dimensional array of fueling values, indexed by engine speed and engine load. The Rover V8 has a tuning potential that made it popular with specialist sports car builders, and it exists in a variety of configurations from 3.5L to 5.0L displacement and beyond. More information about the high-level design and applications of the 14CUX can be found in its Wikipedia article. It was used primarily in Land Rover products from its introduction in 1990 until 1995, and also by low-volume sports car manufacturers (TVR, Morgan, Marcos, Ginetta) until the engine ceased production around 2005. The Lucas 14CUX is an electronic engine management system designed to control fuel injection on the Rover V8 engine.