14CUX Fuel Injection

[mstemp]

For those of you using the Land Rover fuel injection I would like to let you know of some new developments. Some very clever folks with TVR's have broken down the code and revers engineered the ECU. We now have the ability to read our ECU while running and those who have the brains can even remap the ECU for the cost of a chip burner and a few EPROM chips!

For cheap Ba... like myself this is amazing. You order a USB to TTL cable from Digikey, program the USB. Make up a simple plug to replace the Rover TTL 5 pin white diagnostics plug and you are off. I was able to see my sensors, clear my fault codes, see what map I am running, what cells I am in etc. Total costs about $37 CDN with shipping ($8) of the cable. Oh and Fed Ex from Digikey was out of this world, less than 18 hr! For the CDN folks that's unheard of.

Have a look at the links. Steve Sprint has given us all teh TVR Maps and also updated them to 6250 rpm and the last LR update "Pride" before the switched to the GEMS system. Now I already mentioned I am cheap so I wont be burning my own chips but there are folks who will burn one for us at less than $25. As I have a strange stumble under medium acceleration I plan to try out a new chip. While MS is a great alternative 90% of what we need can be gotten from our 14CUX and Rover Gauge.

http://www.pistonheads.com/gassing/topic.asp?h=0&f=9&t=1325176&i=0

http://www.stevesprint.com/remap-14cux/bins

[rficalora]

I don't have rover injection, but that is a very cool development!

[BlownMGB-V8]

Excellent! A big step in making that system a very good choice for EFI.

Jim

[donkelly23]

Mike , May I have permission to copy your first post and reprint in on the TWOA forum and Facebook page?

[mstemp]

Don,

No problem, most of its not mine anyways. Steve Sprint, Piston Heads etc are the ones who made this possible after Dan & Collin Bourassa reverse engineered the ECU. Without the TVR boys this would never have happened!

[pcmenten]

Yikes! Is the 14CUX bank-fired or sequential?

I'll admit that I got spoiled when I owned an 86 Mustang GT with SEFI. Incredibly nice technology for a mid-80's vehicle.

[DiDueColpi]

The wiring diagram would lead you to believe that the 14CUX is sequential but it is in fact a batch fire system.
With the only engine speed input coming  from the ignition coil it has no way of determining which cylinder is firing. It only knows that one of them is, and the engine on average needs X amount of fuel. A few more inputs would be needed as well as a much faster processor.
It's all very British. The engine and the fuel injection were never properly introduced. So they tolerate each other to preserve "good form"
and carry on.

Cheers
Fred