Xr3i to Rs Turbo
Discussion
Hi all converting my escort cabby xr3i to rs turbo and the looms giving me a bit hassle.
Sure it was off a track car so theres no lights etc only the connectors for the engine/turbo then upto the ECUs.
The problem is this is my first time and im not sure on how all this works i have got the old xr3i one upto the fuse box and took the black tape off so i can take the wires i need out the loom and leave with the car but how do i get around the fuse box not to sure what im doing.
Thanks
Sure it was off a track car so theres no lights etc only the connectors for the engine/turbo then upto the ECUs.
The problem is this is my first time and im not sure on how all this works i have got the old xr3i one upto the fuse box and took the black tape off so i can take the wires i need out the loom and leave with the car but how do i get around the fuse box not to sure what im doing.
Thanks
Yea i agree you are no help , im sure thats what these forums are for and some kind person will let me know.
The Rst engine and xr3 are the same engine , just modified for a turbo etc and had my loom not have been a track one im sure id would have been alot easier.
See the difference is id rather learn this instead of paying someone else to do it - wheres the fun or sense of self achievement in that?
The Rst engine and xr3 are the same engine , just modified for a turbo etc and had my loom not have been a track one im sure id would have been alot easier.
See the difference is id rather learn this instead of paying someone else to do it - wheres the fun or sense of self achievement in that?
Well, I learnt by helping a man who knew what he was doing.
Just because the engine is basically the same, doesn't mean it's a simple fix. There will be all sorts of different wiring for the turbo, not something someone on a forum will be able to help with. Certainly not in the detail you require.
And just so you know, I'm not being obstructive, just letting you know forums are for discussion not just 'dig me out of this big hole I'm in' help.
Best of luck, but I suspect you're going to need an auto electrician and deep pockets.
Just because the engine is basically the same, doesn't mean it's a simple fix. There will be all sorts of different wiring for the turbo, not something someone on a forum will be able to help with. Certainly not in the detail you require.
And just so you know, I'm not being obstructive, just letting you know forums are for discussion not just 'dig me out of this big hole I'm in' help.
Best of luck, but I suspect you're going to need an auto electrician and deep pockets.
Your not being obstructive - your a waste of time - a non helper. You have no idea of my situation dig me out of what hole. A prject to learn on is hardly a hole moron. You should keep your opinions to yourself if they are non helpful.
Folk like you turn forums useless.
Why even chime in if you have no experience of the job?
Folk like you turn forums useless.
Why even chime in if you have no experience of the job?
Well, I've had to mess around with a few looms like this that are in a bad old way, and it's very much "if you need to eat an elephant, chop it up into burgers". Do one bit at a time and you'll work your way through it.
Get a wiring loom diagram for both cars, maybe photocopy them blown up larger, and a nice big sheet of thin hardboard or MDF, a pack of zip ties, and a marker pen.
Then lay out the looms on the board, and identify what a given individual wire is, then if possible try and lay things out how they're arranged on the wiring diagram.
Use the zip ties to attach the wires on (put holes through the board), and label what each wire and multiplug etc is for.
Once you get it all laid out, you'll be able to see where things are missing from the loom being chopped about etc and figure what you need to do to integrate the two together.
Get a wiring loom diagram for both cars, maybe photocopy them blown up larger, and a nice big sheet of thin hardboard or MDF, a pack of zip ties, and a marker pen.
Then lay out the looms on the board, and identify what a given individual wire is, then if possible try and lay things out how they're arranged on the wiring diagram.
Use the zip ties to attach the wires on (put holes through the board), and label what each wire and multiplug etc is for.
Once you get it all laid out, you'll be able to see where things are missing from the loom being chopped about etc and figure what you need to do to integrate the two together.
If both are EFI cars then you can use the original 3i loom. Some earlier EFi looms will need a quick pin swap at the ECU, check the that the CO signal wire goes to pin 27 and the MAP signal wire to pin 45 on the ECU connector.
If they are MFI or some odd track day combination then the track car loom is a bit of a curve ball as who knows what was done with that but If the loom you have with the RST motor was modified for a proper track car then it will have a main power feed into it which would have originally come from the master switch along with probably a fuel pump relay drive wire.
Link the main power wire to anything ignition switched in the fuse box (Haynes has the wiring diagrams for Mk4 3i or the fusebox lid has the fuse functions). Fuel pump wire needs to go to the fuel pump relay in the original box to pull the relay down when the engine is running. If it has no fuel pump wire (may have been on a switch in a track car) you'll need to trigger the fuel pump off a switch (worry about pinning it back to the ECU once the car runs).
Assuming you have an earth in place then it should run at this - although keep in mind you probably won't have a dash so stick a mechanical oil pressure gauge on it to make sure it actually has oil pressure.
If it is MFI then this link has wiring diagrams at the end of the PDF for 3i. https://www.leschroniquesdegoliath.com/wp-content/...
Worth noting AutoDynamix do replacement MFI and EFI RST looms - https://shop-autodynamix.co.uk/c/rs-ford/rs-turbo-...
Also there is a load of info from the early 2000's on Passion Ford still, probably a full MFI to EFI guide
If they are MFI or some odd track day combination then the track car loom is a bit of a curve ball as who knows what was done with that but If the loom you have with the RST motor was modified for a proper track car then it will have a main power feed into it which would have originally come from the master switch along with probably a fuel pump relay drive wire.
Link the main power wire to anything ignition switched in the fuse box (Haynes has the wiring diagrams for Mk4 3i or the fusebox lid has the fuse functions). Fuel pump wire needs to go to the fuel pump relay in the original box to pull the relay down when the engine is running. If it has no fuel pump wire (may have been on a switch in a track car) you'll need to trigger the fuel pump off a switch (worry about pinning it back to the ECU once the car runs).
Assuming you have an earth in place then it should run at this - although keep in mind you probably won't have a dash so stick a mechanical oil pressure gauge on it to make sure it actually has oil pressure.
If it is MFI then this link has wiring diagrams at the end of the PDF for 3i. https://www.leschroniquesdegoliath.com/wp-content/...
Worth noting AutoDynamix do replacement MFI and EFI RST looms - https://shop-autodynamix.co.uk/c/rs-ford/rs-turbo-...
Also there is a load of info from the early 2000's on Passion Ford still, probably a full MFI to EFI guide
Tyre Smoke said:
They are two very different cars that share a badge.
They are pretty much identical cars to the point that some years shared the same engine harness! Back in the late 90's it wasn't unusual to turn a crashed RST and a good 3i into one good RS Turbo over the course of a lazy weekend.
InitialDave said:
There's another kind of RST?
Rumour has it that there are still some RSTs out there which didn't start life as 3i's Of course, as we all know, the most fun was achieved by RST'ing an Orion (usually in maroon or beige and acquired from the local paper for circa £500) and leaving the popular plus badges on it
poppopbangbang said:
Tyre Smoke said:
They are two very different cars that share a badge.
They are pretty much identical cars to the point that some years shared the same engine harness! Back in the late 90's it wasn't unusual to turn a crashed RST and a good 3i into one good RS Turbo over the course of a lazy weekend.
But you carry on petal.
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