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Mar 22, 2017 15:28:09 GMT
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Right, I'm fitting an M52 into my 110 and have arrived at the point it needs the wiring connecting up to make it all work.
Ideally I want it all to go in, connect up and it fire first try, which if I get it all right isn't an unworkable idea.
I've got the E36 workshop manual wiring diagram for the engine loom which answers most things, but I'm wondering if anyone has a specific list of wires which I need to connect to have things working, and what the minimum needed to have it running happily is.
Obviously the big red wires are battery lives, the black ones are earth's, but a definitive guide would be useful.
Also, am I correct in assuming the fuel pressure regulator is on the return side of the rail?
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Mar 22, 2017 15:52:30 GMT
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If it is anything like the M60 lump then the fuel regulator is on the return side.
Looking forward to seeing if anyone steps up with wiring clear cut info as need to get mine fired up soon.
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andyborris
Posted a lot
Freedom is just another word for nothing left to lose.
Posts: 2,158
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Mar 22, 2017 18:50:13 GMT
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Are you using the BMW ECU/DME?
I used one on my M52 into Triumph conversion, but it needed remapping to work in a strange car. The actual wiring is pretty simple, making it look tidy isn't!
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Mar 22, 2017 20:51:41 GMT
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Using a BMW ECU with the EWS disabled and the need for an ABS input removed and standard engine loom.
I reckon I could work it out from following wires on the engine and the diagram, but anything to make it easier for myself.
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andyborris
Posted a lot
Freedom is just another word for nothing left to lose.
Posts: 2,158
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Mar 23, 2017 18:58:12 GMT
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link is the standard for a M52 into E30, some of which carries across to old English cars. link has a list of the pin outs (and colours) on the big X20 plug. link has downloadable wiring diagrams, much better than a Haynes (unless Haynes has improved recently!). Took me a bit of time to understand the schematics, but very useful. Really, it's only 3 wires to connect the engine loom to the car, apart from the large live feeds and earths. If I remember correctly, the ECU needs a ignition switched 12v feed, the fuel pump needs a wire (the relay switches via earth, I think) and a feed from the X20 to a rev counter. All reds are live all the time, red/white provide 12v to sensors or components, brown is earth, brown/orange is earth for sensors or components. The only real tickle are the O2 sensors, which if I remember correctly needed a "relayed" 12v feed to the red/white live. For some reason I think the loom I used was missing this.... it was a long time ago and I no longer own the car, so can't take a look! I found the hardest part was making it neat, found the best tape was the "German" style fabric tape sold on the EBay, looked quite factory. And the auto looms have twice the wiring...... And (bragging now!), not the on first try, but on the second go, after I'd put some petrol in the tank (always helps!) it started. A good feeling.
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andyborris
Posted a lot
Freedom is just another word for nothing left to lose.
Posts: 2,158
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Mar 23, 2017 19:02:53 GMT
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The only other thing I'd suggest, is to do a continuity test on the ECU plug and the sensor plugs. There are a couple of plugs that can be put onto the wrong sensor.
And by checking against the pin out diagram, you can label each sensor plug in the comfort of your living room (the girlfiend helped me!) and check the wiring is fine at the same time!
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Mar 23, 2017 20:59:15 GMT
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Legendary sir. Just legendary.
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