cristiano_iglésias

I will be eternally grateful if you help me find this blessed kkkkkk

RSmark84

Have you tried on the XROC forum using the link i gave you?

Also try the RSOC forum in the S2 section. Sign up to them, the wider the search the better change of finding it.

http://www.rsownersclub.co.uk/rsocbb...play.php?f=173

cristiano_iglésias

thank you, I'll try for it and any news you speak.
then I'll ask for some help to upload photos and such and introduce me there all right forum

woody8045

Hi everyone

I thought I would stick this post in here regarding the 'Retro Fit' of the Mk4 Escort / Mk2 Orion Fuel Computer on the Mk4 EFI XR3's.

I've noticed that it's quite hard to find out any info on these, and on a couple of occasions i've been told not to bother lol. When I get told that it's 'not worth it' or 'not to bother', it makes me want to do it even more.

So if you're like me and you're determined to get it fitted and wired up, here's all you need to know

Firstly you don't have to have the original plug for the fuel computer. If you haven't got this, pop down to your local car radio shop and buy the tiny female spade connectors for fitting speakers (PIC TO FOLLOW).

Next, you will need some wire. The longest run will be to the fuel sender wiring under the rear seat, so make sure you get enough.

Once you have your wire and connectiors, you will need to remove the speedometer unit & surround, which is just a case of removing 6 phillips screws and unplugging one White & one Blue plug on the rear of the speedo. Oh and you will need to unclip the speedo cable aswell

Now the speedo unit is out of the way, you will notice a small yellow 'D' shaped plug taped to the main loom on the right hand side. This is a 5 pin plug, but only 4 are used. The wire colours are as follows:

Red ------------ +12v DC
Grey/Yellow --- Illumination
Brown x2 ------ Fuel Flow Circuits
Black/Yellow -- +12v DC Ignition Live

I chose to remove the plug and extend the wires to my fuel computer. There are however some wires that aren't on the plug. You will have to wire in 4 additional wires :

Ground x2
Fuel Sender
VSS (Vehicle Speed Sensor)

It should be noted at this point that the wire for the Fuel Sender should NOT be wired to the gauge, and instead should be run to the spare unconnected 2 pin plug which is situated under the car carpet which is under the rear seat.

Okay, now time for a little diagram and all the details...



Pin 1 should be connected to the RED wire located on the Yellow 'D' shaped plug.

Pin 2 should be wired to the GREY/YELLOW wire on the Yellow 'D' shaped plug.

Pin 3 should be wired to the BROWN/RED wire on the unconnected 2 pin plug situated under the rear seat. The other pin on this plug should be connected to Earth.

Pin 4 isn't used.

Pin 5 should be connected to Ground along with Pin 8.

Pin 6 has to be spliced or soldered into PIN 4 of the ECU. NOTE: the VSS wire has to remain connected.

Pin 7 has to be connected to the 2 brown wires which are located on the yellow 'D' shaped plug.

Pin 8 has to be connected to Ground along with Pin 5.

I hope this helps you out, and please note, this is for EFI cars only

Cheers Andy

AstoN_B

iTrader: (1)

I really don't think it's possible to use the fuel computer on a carbureted car. Not with any degree of accuracy at all.

I have the install information and self test procedure etc as I supplied you. But I simply can't see a way of measuring the amount of fuel being used in a way the computer would find useful.

cristiano_iglésias

hello again I'm very grateful for the attention that here in Brazil'm not taking on the fuel computer vi such that accurate FFS fuel flow sensor to measure the flow of fuel, this sensor I ask my colleagues to find help for me to buy

cristiano_iglésias

thank you very much my friend, the scheme had already but the problem is that my car is carbureted and I need FFS fuel flow sensor I saw that some escorts dai has carbureted and in the case of this piece is that I lack

cristiano_iglésias

hello my friends, by chance would you know someone or have a fuel flow sensor S2 escort to sell me?
thank you

LEEscortXR3i

Hi Guys. I realise this is an old thread, but finding any info on the fuel computer online is getting really tough!
I have a Mk4 XR3i EFI and I've had the fuel computer in for a couple of years. Over the past few months it's started playing up and I'm wondering if anyone can help me sort it? I'm at a loss!! Every time I start the car, the fuel computer starts beeping saying there is no fuel in the car, even though the fuel gauge says otherwise (see pic) although I'm a bit skeptical about the fuel gauge too!

The other settings don't work either such as the instant economy. My rev counter is severely under-reading too - I think the speed sensor is combined with the speedo cable isn't it? Does anyone have any idea what's wrong with it? It used to work perfectly but seems to have packed in.

Thanks for any help,
Lee

LEEscortXR3i

Hi guys. I've just ran the self-test mode on the fuel computer and I'm puzzled by the results....
TEST 1 - Speed Count
The display should increase from 0 to 255 based on the speed pulses.
The display showed zero constantly, regardless of the speed I was going.

TEST 2 - Fuel Flow Count
The display should increase from 0 to 7 based on the fuel flow pulses
The display varied between 0 and 7 but I couldn't spot any pattern - it didn't seem to be related the the speed I was going or whether the accelerator pedal was pressed.

TEST 3 - Fuel Level Average Display Count
Approx. 40 = Empty tank
Approx. 220 = Full tank
Approx. 225 = Open circuit
Display showed 50 while I was idling. Then varied between 49-51 when moving.

TEST 5 - Range
The display should show 255 or 0. 255 for Carburettor or EFi engine. 0 for four cylinder mechanical fuel injection
My display showed flickering values between 249-255.

Tests 4, 6 and 7 are OK and aren't related to the sensors anyway.

Cheers for reading. Does anyone have any ideas what the issue(s) might be?

Cheers,
Lee