1995 m73 5.4 v12 ecu needed for countach replica !!!!!!!!!!

[jamesuk]

Hi guys n girls , new here and in desperate need of help , im not to clued up on ecus but am near the end of my countach build and need to get this running , its a 1995 m73 5.4 v12 .

is there a " basic set up " ecu i can buy or a list of questions than i need to know ?

im totally lost and need some guidance

thanks

[AndreyB]

I am working on a plug & play solution for M73

What transmission do you have? Can you please post pictures of what parts of harness your have or not have?

As is it's unclear if you have engine which was on file, engine with all electronics or something in between. Please post a couple of relevant pictures to help us understand the state of your build in terms of engine and transmission control.

[Simon@FutureProof]

You lucky that you are using an M73 so we have a fair bit of knowledge on these between a few people on the forum.
I gather your install is relatively unique but that should not matter too much.

For general information then the wiki is the best place to go. https://github.com/rusefi/rusefi/wiki

If your looking at running an M73 then we only have 1 board that can run them so far and that is the Proteus board. This board is still quite new but the hardware is proven.

Your best option is to join the slack Chanel (details in the wiki).

Regards, Simon.

[jamesuk]

hi guys , its got a Renault un1 manual gearbox, its a fresh build so no electrics as yet , i do have the full wiring loom/engine loom from the original bmw in my workshop.

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[bill]

welcome!
i have a 1995 BMW also-- check this thread out....
https://rusefi.com/forum/viewtopic.php?f=3&t=1749&sid=9899f6add561ee87bb81cafe0bf37f4f&start=90

its just for V-12's

where are you located?
in the UK somewhere?

[bill]

also, how did you connect your v-12 to the transmission? adapter plate?
please share details!

[jamesuk]

great thanks , yes mad my own adaption plate

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[AndreyB]

Do you have two sets of these on your harness? twice 134 total?



please take a pic of this or similar on your harness to confirm that we have same or different wiring.

[jamesuk]

would they be on the engine harness or the car harness ?

[AndreyB]

engine harness, those are inside large fuse box where original ecus are

[jamesuk]

Do you have two sets of these on your harness? twice 134 total?



please take a pic of this or similar on your harness to confirm that we have same or different wiring.

not sure , i can get better pics tomorrow as home a bit earlier

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[AndreyB]

These pictures are a bit inconclusive. Please confirm exactly if you have two sets of exactly what's on my picture - one set black another set grey.

These could be two ETB controllers and transmission control unit but maybe not.

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[AndreyB]

a list of questions than i need to know?

Q1: Do you have injectors on the engine?
Q1.2: if yes, do you have wires plugged into injectors?
Q2.3: if yes, do you know where for example injector #1 wires currently go to - where do they terminate?

Q2: Do you have 12 spark plug wires going into two distributors or do you plan to run something else for spark?
Q2.2: do you have two ignition coils hanging on engine sides?

Q3: what's the deal with your ETBs facing the wrong way? Did you have clearance issues or what? What exactly is flipped how?

[jamesuk]

Q1.. YES ALL THERE

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Q1 . 2.. NO THERE STILL ON THE ENGINE LOOM

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Q1.3 .. IT WILL TAKE ME A WHILE TO SEE WHERE THEY GO BUT CAN DO THIS ON THE WEEKEND IF NEEDED,THEY TERMINATE HERE SOMEWHERE ....

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Q2 .. YES HAVE 12 PLUGS GOING TO 2 DISTRIDUTORS , IT WOULD BE EASIER TO KEEP IT HOW IT IS IF THATS POSSIBLE BUT CAN CHANGE IF NEED BE
Q2.2 .. YES 2 COILS ON ENGINE LOOM

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Q3.. YES HAD TO JUST SWAP THEM FROM FRONT OF ENGINE TO BACK DUE TO CLEARANCE WHEN AIR FILTERS FITTED

[jamesuk]

Do you have two sets of these on your harness? twice 134 total?



please take a pic of this or similar on your harness to confirm that we have same or different wiring.

i can not find these on the engine loom , this is all i could find on engine loom

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Andrey says these four round things are cute CAN bus connectors, not useful for this engine.

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had a quick look at car loom and found this, will dig deeper on the weekend

Andrey says this plastic white control unit is body electronics, totally not useful for this project.

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[AndreyB]

I am now very confident that we can fire this engine up Please subscribe to https://rusefi.com/forum/viewtopic.php?f=3&t=1632 there will be relevant updates in the next few days hopefully.

[jamesuk]

I am now very confident that we can fire this engine up Please subscribe to https://rusefi.com/forum/viewtopic.php?f=3&t=1632 there will be relevant updates in the next few days hopefully.

I LIKE THE SOUND OF THAT !!!!!! LOL

[AndreyB]

I LIKE THE SOUND OF THAT !!!!!! LOL

Please notice my email where I am asking if you have WhatsApp/Hangouts/Skype or any other way for us to voice talk without international phone call.

[AndreyB]

Since James has complete donor bmw 750 car in pieces including gauge cluster and everything, my recommendation is to see how well it would run on everything stock.

I assume it would be running good enough since that's not really a track time attack vehicle anyway? rusEFI would only make sense if there is a good reason not to go with OEM electronics.

[AndreyB]

PS: I was not able to find 1995 wiring diagram My source has 1997 and 1998 but not 1995 which seems to be a bit different.

[Simon@FutureProof]

by the look of it this is an M73 rather than the M73tu so it is using 3x 88pin connectors.

This one is the reason I was sure Andrey's was 88pin but turned out to be 134pin.

There is a change on the M62 V8 and M73 V12 sometime in the 90s from the 88 pin to the 134.

[Snugg1981]

Hi Jamesuk.

I am doing the same conversion with v12 m70 bmw to un1 Renault gearbox. I could do with some help on the adaptor plate and what flywheel clutch etc u used. Would you make another one or have the template you made?
Kind regards

David.

[Snugg1981]

I am also interested in your plug and play system for bmw v12. Mine is a M70 v12 . Not sure if the connections differ or not. Kind regards

[AndreyB]

I am also interested in your plug and play system for bmw v12. Mine is a M70 v12 . Not sure if the connections differ or not. Kind regards

M70 and even early M73 connectors are different, I am not aware of anyone planning to make a PnP harness for M70.

Your best bet is soldering https://www.ebay.com/itm/333811680319 to match your connectors. Many breakout boards are listed on the bottom of www.rusefi.com yours is probably 88 pin?