Itching to try it out I'll bet.

Nice work. I'm doing the exact same swap and I was wondering how you wired up the three relays under the seat next to the ecu? With the original system the flapper has a switch in it to turn on the fuel pump, but I guess with the 14CUX this is done by the ecu and may need some wiring mods? Cheers.

@tuopeeks

Жыл бұрын

Going from memory, there are a few different connections in the wiring harness connecting a CUX ECU instead of the Lucas ‘flapper’ type. You definitely need the CUX wiring harness with the engine management. This will include under seat relays. I also changed the main car wiring harness to accommodate this change, otherwise some extra wires may be required. You’re right regarding the fuel pump. This is through a switch in the flapper air flow meter, where as it is a relay controlled from the ECU in the CUX ECU. The ECU main car harness has an inertia switch to disconnect the pump in an impact. This isn’t on the ECU harness and was part of the function the flapper air meter provided. There are also a few other differences including the lambda sensors, if fitted, a road speed indicator also feeds the CUX ECU and this is derived from a sensor on the transfer box on later vehicles with electronic speedometers and ABS. The engine will run without this signal but may have a different response. There is also an indicator resistor added to the ECU harness indicating if automatic or manual transmission. So, there are a few differences that need addressing to replace the injection system. Hope that is of help.

@TheNight-Rider

Жыл бұрын

@@tuopeeks Thank you, it's a great help. I'm only changing the ECU/engine harness so I guess there will be a bit of splicing required for fuel pump relays etc. As for the road speed signal, I've read it's to help the 14CUX adjust idle properly and people seem to have omitted this in swaps and it's fine... but will have to test it all out to know for sure. Thanks again.

Do the flapper airflow meters wear out on those? I know it's a problem with some old VW cars.

@tuopeeks

4 жыл бұрын

Yup, they can wear and develop poor contacts and non-linear tracking.

@T2D.SteveArcs

4 жыл бұрын

@@tuopeeks I imagine anything that relies on a moving physical contact especially on a carbon track would be problematic in the long term, bad contact, noise, flat spots and so on,, also having a re-mapable ecu is a real bonus Good upgrade thanks for sharing

@tuopeeks

4 жыл бұрын

@@T2D.SteveArcs Thanks, yeah you got it, these printed carbon on ceramic variable resistors are well made but they see a lot of wear and degrade.

Tengo un RRC 3.5. Podrías darme todos los números de partes que necesito para pasarlo al sistema 14CUX??

@tuopeeks

3 жыл бұрын

Es un gran trabajo, pero el sistema es exactamente el mismo que el 3.9, excepto que usa el número de ECU PRC9235

@alcideslazomolina3286

3 жыл бұрын

@@tuopeeks Me imagino que tenes que desmontar absolutamente todo para meter todos los cables. No tenes video del proceso? Tengo mucho problema con mi sistema y poner un sistema que pueda escanear seria excelentisimo.

@tuopeeks

3 жыл бұрын

@@alcideslazomolina3286 Supongo que tienes un sistema "Jettronic" de 3.5 V8. Para adaptarse al "CUX14", debe considerar algunas entradas adicionales. Estos incluyen el sensor de velocidad no instalado en los sistemas "Jettronic". También debe decidir si se utilizarán sensores de O2. Comenzaría con el diagrama del circuito del sistema CUX14 y vería cómo conectarlo a su cableado en su Range Rover. Lo siento, no hice un video sobre todos los cambios y conexiones que hice.