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. The Rover V8 is easy to modify because it is essentially an American push rod V8. But the Rover V8 was designed to be physically smaller and as light weight of a V8 as possible. This computer chip is designed to cause the engine to run better under all circumstances. Whereas the original chip supplied in the 14CUX computers is designed to maintain exhaust emissions within a strict arbitrary standard. This involves sending unburnt fuel to the catalyst to maintain the high temperature required to meet the standards. With this chip your engine will run better from the moment you turn the key until you turn it off. This chip is oriented around a sensibly modified 4.6L engine. However it will run any size Rover V8 engine better. Doesn’t matter that much if 3.5L to 5.0L. That is one of the advantages of the Lucas 14CUX engine management systems is the it is very adaptive to different applications. Most enthusiasts opt for a modified 4.6L when hot rodding their Rover powered vehicle. So this chip is ideal in that case. But do not worry that your engine is different size or not modified, or extremely modified, etc. Your vehicle may have a tune resistor. I do 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. 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. We use only military grade EEPROM chips. The chip pins are inspected and preformed to fit the socket on the ECU circuit board to ease installation. If you feel uncomfortable about installing the chip in your computer then I will be happy to install it for you no extra charge. Just send me a 14CUX computer and I will install the chip and return it the same day. If you are worried about the chip installation or the tune resistor, then you should be able to find a technically oriented friend to help you. In a matter of minutes the installation can be done. EFI diagnostics should be unaffected by this chip. They all had a Rover V8 that they wanted a high performance chip for and that is what they received. The item “Discovery Defender Morgan Range Rover V8 14CUX High Performance Computer Chip” is in sale since Friday, July 5, 2013. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Computer, Chip, Cruise Control\Performance Chips”. The seller is “92rrrandall” and is located in Cary, North Carolina. This item can be shipped worldwide.
- Country/Region of Manufacture: United States
- Manufacturer Part Number: 14CUX4.6HP
- Brand: Plastic Tooling
- Warranty: Yes
- Country of Manufacture: United States