14CUX NAS Spec chip upgrade 3.9

This software is intended for the 3.9 Lt engine, where the car is still using the standard Lucas 5AM airflow meter and standard Land Rover ERR722 fuel injectors.

What do I get? 

• Updated software to install into a Lucas 14CUX “Hotwire” Fuel Injection computer
• An EPROM chip with the necessary decoder board, all packed in an anti-static shipping box

What do we recommend?

• For best results the fuel pressure should be set to the standard 2.5 Bar (36psi)
• We recommend upgrading your fuel injectors 
• Upgrading your MAF to the GEMS 2AM unit is recommended

What are the benefits? 

• 10-15 BHP power increases with
• Improvements in fuel economy of 10-15%
• Better response above 4500RPM and removal of the "flat spot" on full load between 1750 and 3250RPM
• Improved idle speed, idle stability, shift patterns, cold starting, crank fuelling, rev limit (6500rpm), etc.
• Improved engine acceleration via the ECU configuration, to make it more responsive
• Service and fault diagnosis procedures are unaltered, and the upgrade is undetectable to Land Rover TestBook, Autologic, Rovacom or Lucas/Sun PDL test equipment
• Removal of speed limiters if applicable (except TVR)
• “Check Engine” (or MIL) lamp is disabled in the software for all territories except North American Specification (NAS) vehicles.

Important Notes There are two families of Lucas 14CUX ECUs. Before you place your order we need to check which type you have, so please contact us first. All original TVR supplied ECUs have “plug-in” chips, with the appropriate socket fitted. If the ECU is not original (e.g. replaced by a Land Rover standard version to fix a fault) then it may not have a socket, so in this case it will be necessary to have a socket fitted to receive the new chip. We can arrange this for you at a small cost, but again it is essential that you contact us first.

We recommend checking your fuel injectors and MAF are performing as expected prior to installing this chip.