Learning about the 3.9 14CUX ECU
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Re: Learning about the 3.9 14CUX ECU
Way I went too, Eliot. Although I do know of an SD1 with EDIS/Megajolt and Lucas flapper injection - albeit Mark Adams modified, since it's got a 4.6 RV8. There probably is someone out there who has done the same with the hotwire.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Re: Learning about the 3.9 14CUX ECU
Eliot - thanks for the interesting information but not going MS at this stage - hence the 14CUX questions.
Cheers
Garry
Cheers
Garry
Re: Learning about the 3.9 14CUX ECU
For Range Rovers of the vintage that used the 14CUX, they used a short cable coming from the gearbox into a separate transducer.
The transducer is part no. AMR3386 and the cable is PRC7979, all available from Island 4x4.
The sensor has just two wires, I think it is a reed switch, so it needs some circuitry to drive it.
If you were to find the wiring information for said Range Rover, you might well find that the signal is adapted in some way to drive the ECU.
I have just measured one, and it goes between about 120ohms and open circuit 8 times per revolution of the speedo cable.
Chris.
The transducer is part no. AMR3386 and the cable is PRC7979, all available from Island 4x4.
The sensor has just two wires, I think it is a reed switch, so it needs some circuitry to drive it.
If you were to find the wiring information for said Range Rover, you might well find that the signal is adapted in some way to drive the ECU.
I have just measured one, and it goes between about 120ohms and open circuit 8 times per revolution of the speedo cable.
Chris.
--
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Re: Learning about the 3.9 14CUX ECU
I guess there is no reason this would be a problem as long as the idle is high enough. I think the reason for this is to make gear changes a little easier. However when I didn't have mine hooked up the engine would stall now and again when coming to a stop. Could have just been my engine though.garrycol wrote: ↑Tue Apr 23, 2019 11:30 pmBack to speed input to the 14CUX (Hotwire) ECU.
I am looking at this to provide speed input to a 14CUX (Hotwire) ECU in my FC101. A friend also has a FC101 with 14CUX system and he does not have any speed input to his ECU and the vehicle runs and idles fine.
So is speed input important to the 14CUX Hotwire ECU?
Thanks
Garry
Re: Learning about the 3.9 14CUX ECU
Thanks to Chris and GD for that input - I will have look.