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B230FT wont start- part 2 900

posted by  Dave Stevens on  Fri Dec 22 23:49 CST 2023
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last visit: Sun Jan 1 02:36 CST 2012
[RELATED]

Hi Bill,
There's a good reason the CPS cable shield isn't grounded at both ends. It's a common misconception with coax applications and not necessarily intuitive. Art and I had a conversation about this here a couple of years ago where he provided a link to an excellent paper on the topic. If both ends of the shield were connected then stray currents may flow through the shield from ECU chasssis ground potential to the bell housing ground potential, thus possibly inducing current in the axial conductors, which is exactly what you're trying to avoid. Any RF hitting the cable gets dissipated by the shield to the chassis at one end of the cable and having two paths to chassis ground would make little or no difference.
--
Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now






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