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Bit of help on M/S coil packs and Lambda wiring please


Boothy

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Just smack bang in the middle of wiring M/S thanks to Fridge Freezer and Bull Bar Cowboy and not wanting to annoy anyone on the phone Sunday a.m. but here goes 2 simple questions

1,

Am I right in thinking that to wire a 4 wire Lambda sensor of an Escort, that the 2 white wires are the heater that should/could be supplied via the main relay switched live and his mate to earth (making the heater live all the time the ecu is powered up),

Black wire is the sensor wire to pin 23 ECU

Grey wire (possibly with red trace) is earthed out ?

Common sense would have told me grey and black would be opposite way around, but thats where help is sought.

2,

S'cuse me for being thick and blind but somewhere along the vast amounts of information I've tried to absord I've missed when wiring the 2 coil packs (which I've mounted directly above the water pump) and will call one "left bank" and one "right bank" do I distinguish from the EDIS8 pins 8&9 and 11&12 which is which,

and further more of said coil packs with connection plugs facing rear of engine (or bulkhead) which plug leads go to what or where?

It looks to me as there are 4 coils total, and it must be required to fire the correct coil pack and plugs to suit?

There's a dead easy answer to that one I know but I dammed if I can find it.

Thanks guys, just wait for the questions when it doesn't start.

Boothy :blink:

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Common sense would have told me grey and black would be opposite way around, but thats where help is sought.

They can vary, but the black is usually grounded to the ECU ground. You'll probably only find out if it's the other way round when you fire it up ;) it's not critical to getting the engine started anyway.

EDIS Coil pack wiring as follows:

coil_wiring.jpg

The A/B/C/D refer to the pins on the connector - the centre pin takes +12v switched from the fuel pump relay, then you have a pin either side that fires that side of the coil pack.

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Thanks again Fridge Freezer, that sorts my immeadiate problems out perfectly,

I didn't fancy playing with the plug leads when its firing, I believe the name Megajolt was a good description of what happens, and Megahurt springs to mind.

Cheers

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Ask Nige, he's done it, I think he nearly had to change his underwear :lol:

if you want even biggerer sparks, Summit Racing sell uprated Accel & MSD coil packs for not too many pennies :blink:

acc-140018_w.jpg

p/n ACC-140018

Bigger ? :blink:

Kin hell,

I used to with bare hands just pull plugs off Rover V8s to identify which plug was maybe cuasing a misfire, just a little pulse was all you got.

I did it to the Megasquirted V8 on tickover to pop a timing light on - with the big Ford Packs on there it was not so much of a "Pulse"

more of a "FfffffArrrghhhhJeez" type feeling, and holding the lead about 1" away while trying to work out if I had had a heart attack saw

a big blue F off spark jump across the gap and a few of these later I decided to drop the lead

Feeling very weird and still wondering if I was going to chuck, or even pass out, a 15 mins sit down in the silly corner

and hearing my neighbour PHSL for the same length of time as he was there saw me almost right....

Basically NEVER gain, and you say a "Bigger Spark" ??????????? :blink:

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Chris,

Its easy to remember how the plug leads go…………..

The coils are two coils in one box ……….. so A & B ……….. as you have two coil packs we call the other two C & D

The firing order is …………..1-8-4-3-6-5-7-2

There fore the lead pairs are,

1 & 6 go to A

8 & 5 go to B

4 & 7 go to C

3 & 2 go to D

With each ‘coil’ (ABCD) it doesn’t matter which way round the leads go …… as one is always ‘fire’ on a compression stroke & the other is ‘wasted’ on an exhaust stroke.

Did you get my email OK ?

:)

Ian

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Nige, I cannot imagine how that must of hurt, it hurt me reading about it, I have a fear of plug lead belts from finding out the hard way on my first car a 1969 Escort Van with a missfire, and can still remember thirty years on, and thats candle power really compared to todays coils.

Ian, seeing that makes it a clear as Gin, it was the realationship from the EDIS 8 to the ECU where I was struggling, but were on a roll now. And yes I did get your email OK, many thanks again, I'm going to have a hell of a bar bill one day when we all meet up.

Hopefully a couple of evenings of soldering and extending and trying to keep em neat, they're above me head in the back of the Kingcab on show, so I'm trying like mad to loom them as much as possible neatly.

Before anyone adds "if you roll in water your ECU will get wet", if that happens and I'm sat in it then the last thing I'm gonna be concerned about is a wet ECU, where's the nearest bar will be more important.

Thanks again lads, I'm still smilling about Nige :P

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