01+ coil connector and 99 coil receptacle source?
 

I'm putting an 05 engine into my 99 running a hydra, looking to splice 01+ coil connectors into my stock 99 harness. I'm having a hard time finding anyone willing to sell just pigtails for these (if anyone has a pair please pm me) does anyone know the brand/part number connector these are?

The plugs that goes here
https://www.miataturbo.net/attachmen...ine=1332540263

so far found this, http://www.mouser.com/ProductDetail/...Gqmh2A2acsdbe4

and this, http://www.bmotorsports.com/shop/pro...oducts_id/2075

has anyone used these?

Second part, it would be great if I could make a pnp harness so I can go back without cutting and soldering. Has anyone found a source for the receptacle end of the 99 coils?

If no one knows I'll post up what I end up with in two weeks.

Let me look this weekend and see if I still have those on my old 01 wiring harness. If so I would let them go for cheap.

Why do you want the 01 coils? My impression is that the 99-00 coils are stronger than the 01-05.

--Ian

Shuiend above, or PartsGroup or Panic Motorsports? I got mine, plus a VVT connector from Panic.
I believe the 99/00 coil pack won't bolt up with the VVT oil tube in the way, so it simplifies installation of a VVT head? I've not checked to see if the 99/00 plug boots will even fit down the holes on a VVT head, but they look like they would be pretty tight.

I had to cut the factory harness when I put Toyota COPs on my '00, so I used a 6 position weatherpack connector. You can get them as pigtails from Whites so you don't have to buy the crimpers. I built a little "back to stock" harness with another weatherpack and the stock 99/00 coil connectors just in case I had to go back (and I did, for emissions testing.) I had originally got a set of burned up 99/00 coils and cut the connectors off to try and build a PNP harness, but it turned out to be a huge pain in the ass.

Humm... anyone know if 99/00 ECU can/will drive 01+ COPs?

The boots needs to be trimmed down slightly to fit into the VVT head. You just take a razor blade and slowly cut of small slices of the boot until it fits down the hole.

Thanks guys, I'll give parts group and panic motorsports a call/email tomorrow.

My logic in this is that I'm taking an entire turbo setup, engine, fuel system, intake, exhaust, sensors and hydra out of a friends 05 (minor collision) that has been running perfect for a while now and swapping it into my car. I'm keeping the setup as close as possible to cut down on dyno time and troubleshooting variables. Once it's together and running perfect then I'll change the little things here and there to my liking, but when we pulled everything it worked awesome so I want to f with it as little as possible until then.

From what I read, the ms crowd says that the 99/00 coils and 01-05 coils have the same dwell, but they build and release different amounts of energy. I don't know what else the ecu would need to run them or what changes that would make to the ignition map, but I would guess they'd work.

Eh, just for connecting the coils I elongated the connectors to the 99 coils, nothing special at all.
But I converted the 01 injector/coil harness to the identical function of the 99 to fit the rest of the harness (need to swap between 01 and 99 engines for inspection).
Be aware that the coil harness connector at the front of the engine contains very different signals between the 99 and the 01-05 (I assume the MSM is the same). 99 have coil power and trigger in the square 4 pin connector, the 01-05 have coil grounds in the identical connector.
Just make sure instead of just connecting where it fits.

Thanks Niklas,

Your rebuild looks awesome, very close to what I had set out with my engine builder. Unfortunately this deal came up and I couldn't pass up this offer from the dark side.

I think there might be some differences between our 99s (usdm vs your model eudm?) or I'm misunderstanding your post. On mine, the 99 coil connector is a 4 position connector with one unused pin and on the 01+ coils use 3 position connectors.

I do like the idea of a whole adapter injection/coil harness, I might do that in the future. Thanks for the heads up of the differences. I've got both wiring diagrams, I'll be sure to carefully digest them before making that switch.

Niklas, did your stock coil connectors look like this?

https://www.miataturbo.net/attachmen...ine=1332605786

Notice in the above pic, the 99/00 coil has space for 4 pins, but only 3 are populated. My snipped off VVT coil harness has 6 exposed wires on the cut end. IIRC COPs thread lists the wiring pin out for all cars 96+ to be the same, but the connectors and coils are physically different... but don't quote me on that.

I believe euro spec NB1 cars have different coil connectors and pinouts from the US spec version? I think I also read something about this in the über COPs thread, so be careful what you plug into where :rofl:

The brain have been used for too many things since I played with the harness last spring.
Since I have two engines with their own injector/coil-harness I used the 01 coil connectors (from a 01 harness) for the creation of the frankenharness.
So the two engines I have hook up to the same unmodified main harness (with a DIYPNP on the other end).

Sorry for the confusion, there might very well be a difference between the connectors, I just remember the headache of making the cable to 1-4 longer than the one to 2-3 (or was it the other way around :facepalm:), and not cross the signals on the way to the coils, so I did not look that hard at the connectors (the 99 coils and connectors follows the 99 engine).

It ran on the first attempt so I'm not color blind at least (or just lucky). :)

The build is going slowly due to slow delivery of parts (and manufacturing of parts delivered with too low quality). But I'm still hoping for a start-up in May.

Actually, I love your frankenharness idea. Your right, it really shouldn't matter with the Megasquirt. I've seen complete engine harnesses sell for around $45 previously, so I may look into this. I've even got a complete NB engine harness floating around here somewhere, but I'm not sure it its for a 99/00 or an 01+. Humm...

Subscribed. I knew this 99-01 swap was going to give me a headache.

EO2K, does your harness stilll have the part number on it? If the internet can't tell you, you could call up mazda with the part number and they'll tell you. That's what I did with mine.