Shielding the CAS wiring
Turbo Mini Forums

Finally making some progress with the MPI.

Just got a couple of issues to sort out. The biggest problem being the CAS signal is being lost by the Emerald ECM @ low RPM, under load it's fine.

As the CAS is an inductive sensor and the faster the flywheel passes the sensor the greater the voltage - this made me think I hadn't shielded the signal and earth wires.

So I've stripped a small section of the loom (which I made myself) and low and behold - I forgot to shield the bloody wires.......

I'm gonna strip the full loom (needs a wee bit tidying up anyway), but was wondering if anyone had any thoughts on how to shield the wires?

I was gonna twist them together, run the pair though progressively thicker heatshrink or build up layers of self amalgamating tape.

BTW - the sensor is working correctly - I've checked the signal using an oscilloscope

Edited by MrOz on 21st Feb, 2010.

"se ne estas rompita, ne ripar ĝi - supercharge ĝi."

Yes i moved to the darkside

Instagram @jdm_brett

http://www.polevolt.co.uk/acatalog/Screened_Cables.html

:)

Thanx for that chaps.

I'll give the tinfoil method a shot before spending more cash.

Thanx for the excellent link Sprocket.

Would it be necessary to earth the foil at both the sensor end and the ECM or will the ECM do?

Edited by MrOz on 21st Feb, 2010.

"se ne estas rompita, ne ripar ĝi - supercharge ĝi."

Yes i moved to the darkside

Instagram @jdm_brett

Coolio.

Just need to get the IAT sorted and then it's back to the RR.

"se ne estas rompita, ne ripar ĝi - supercharge ĝi."

Tin foil is a half arsed fix, do it right mate

If you are that tight for cash, PM me your address and I will send you some screened cable that will do the job

Only ever ground one end of any screened cable in ANY aplication, that way it acts as a drain for induced voltages, rather than act as a conductor.

Edited by Sprocket on 21st Feb, 2010.

On 21st Feb, 2010 Sprocket said:
Tin foil is a half arsed fix, do it right mate

If you are that tight for cash, PM me your address and I will send you some screened cable that will do the job

Only ever ground one end of any screened cable in ANY aplication, that way it acts as a drain for induced voltages, rather than act as a conductor.

"se ne estas rompita, ne ripar ĝi - supercharge ĝi."

Seriously mate, if you want some, just ask. I use this stuff at work in reels of 100meters. I am not going to miss 2meters

Right.

As the nice chappy Sprocket is sorting me out with some shielded cable (what a nice dude!) - I made a bodged cable as a stop gap.

It's made all the difference. Getting a nice stable idle.

Once I get the proper stuff - I'll sort the loom.

Cheers Sprocket

"se ne estas rompita, ne ripar ĝi - supercharge ĝi."

it'll be in the post tomorrow :)

Nice one Sprocket.

"se ne estas rompita, ne ripar ĝi - supercharge ĝi."