[bobcowan]

Originally Posted by Luce

I would advise against soldering unless you make some heroic efforts to strain relieve all of your connections or the constant vibration will work harden and break the copper conductors at the solder boundary.

Weather packs are available through many sources on the web. Just be sure you have the correct and a high quality crimping tool.

I really like these guys... Weather Pack Connector Kits Megasquirt Kits / Assembled Engine Management Systems, Wideband o2 Sensor Systems and tuning products - DIYAutoTune.com

I've heard that before about soldering. But I don't really believe it. I'v been doing it for decades and I'v never had a joint failure due to that. I cover them with liquid electrical tape, and then shrink wrap. Maybe that's enough to provide strain relief.

I purchased a Weather Pack kit from DIY. Has all the parts needed for some pretty big jobs. Be sure and get their crimper, too. You get a perfect crimp every time. It's not cheap, but good tools never are.

DIY also built my Megasquirt ECU.