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Discovery/Defender Rover V8 - 14cux Chip Upgrade

  • Discovery/Defender Rover V8 - 14cux Chip Upgrade
  • Discovery/Defender Rover V8 - 14cux Chip Upgrade
  • Discovery/Defender Rover V8 - 14cux Chip Upgrade
  • Discovery/Defender Rover V8 - 14cux Chip Upgrade
1.00 LBS
Usually ships within 1-2 days
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Product Description

This is a high performance computer chip for the Lucas 14 CUX engine management system as shown in the first photo. This system was used from ~1989 to ~1995 Range Rover Classic, Discovery I, Defender and Morgan+8 cars is the USA. The 14CUX system has also been installed on countless other Rover V8 power vehicles. 

Included in the kit:

This computer chip is designed to cause the engine to run better under all circumstances. This chip is oriented around increasing performance for a sensibly modified 4.6L engine, but will run any size Rover V8 engine from 3.5L to 5.0L. 

If you feel uncomfortable about installing the chip in your computer then we will be happy to install it for you. Just send us your 14CUX computer and we will install the chip and return it the same day. This service costs $24.99. Send your ECU to The Wedge Shop 111 Dean St (Rear) Taunton, MA 02780.


Your vehicle may have a tune resistor. We will not know if your vehicle has a tune resistor or not. You should look for it, and test for it by probing the fuel injection wiring harness. In the 5th picture you can see the tune resistor is on a blue two pin connector. In the 6th photo you can see that the tune resistor connector(if your harness has one) is right beside the FI relays. If your wiring harness has a 3900ohm resistor, then you must change it to a ~500ohms in order to switch on this fuel map. You can buy a 1/4watt ~500ohm resistor (ex: Radio Shack) for less than a dollar. The effort required to find and maybe change a resistor is no consequence compared to the benefit of this chip. You can see an example of changing the resistor in the 5th photo. Nothing to worry about.

International shipping is $30USD and will be invoiced after the sale. 


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