MSefi.com read only forum (Jan.15,2018)

This might sound like a stupid question but I want to ask it anyway. On the MSII there is the Silver Coaxial wire that goes to the Crank position sensor. There is a wire like mesh around a white wire. I need to legnthen that wire. Is there any specific way to do this?

Also I have a CPS I bought from Boost engineering and a trigger wheel from DIYAutoTune. The CPS has a blue wire and a green wire. Does anyone know which wire is power and which wire is ground?

Anyone??

You may have to lengthen the outer wire by cutting back the gray outer insulation, gather up the outer shield wire and twist into a pig tail and solder a length of regular wire to it.
Remember, only solder the shield to ground on the MegaSquirt end.
I would contact Boot Engineering to find out which wire is power and which is ground.

Skyy

In my experience it is not recommended to splice coax, I would replace it with a longer wire. The FORD EDIS is a 2 wire pickup and even though it it has a wiring diagram you can still end up switching the 2 wires to get the correct polarity. I would hook up the wires and then if required switch them, I would replace that single coax for 2 wire shielded cable http://www.DIYAutoTune.com/catalog/wire ... p-123.html this will help with any noise problems.

While splicing coax is a pain, I'd probably go about it in this manner if I had to do it.

1. Join inner wires together with a solder joint or uninsulated butt splice.
2. Cover the center wire joint with heat shrink tubing.
3. Pull the foil wraps / braids as close to each other as you can get them and solder. If necessary, use some stranded wire to extend them.
4. Cover with bigger heat shrink tubing.

Matt,

That's pretty much what I did. I twisted a bunch of the braided wire and soldered that to some regular wire and heat shrinked the connection. I then stripped the inside wire and entended that and hear shrinked that wire. I then heatshrinked them both again, and wrapped the wires in electrical tape. Then wire loom, and wrapped that also in electrical tape.... never too careful

I would have purchased that 10' long extension but that wouldn't have been long enough still.

My only issue still is that I do not know which wire is power and ground on the sensor side. Again, the sensor has a green and a blue wire coming off of it.

Any help with that is appreciated.

Hey all,

Im coming down to the wire here (pun intended)

I really need to know how I can discern which wire (green or blue) is the power/ground for this crank position sensor that I bought from www.boostengineering.com

Please help.

Peter

you can use a volt meter and a trigger wheel to detirmine the polarity. Set your trigger wheel up steady and pass your sensor over it with the wires attached to your volt meter. I have had to check a few that way and have another to check soon.

Hmmm

I guess I'll have to try that. It sure is a pain in the behind that boost engineering didn't tell me which was which- especially with their kits being as expensive as they are.