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> Need help .. Stuck on this darn MSD box
mb911
post Sep 16 2019, 07:28 AM
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Called MSD this morning.. They feel I should isolate the wiring from the pertronix along with the coil wires to ensure no mixed signals.. Thoughts on that?
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sportlicherFahrer
post Sep 16 2019, 07:33 AM
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It would be interesting to see if that makes a difference. In the manual it says to route the coil wires separate from everything else to reduce EMI to the box. May be worth rigging something up temporary to see if it works. How tied in are all the wires in the custom harness?
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mb911
post Sep 16 2019, 07:58 AM
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QUOTE(sportlicherFahrer @ Sep 16 2019, 05:33 AM) *

It would be interesting to see if that makes a difference. In the manual it says to route the coil wires separate from everything else to reduce EMI to the box. May be worth rigging something up temporary to see if it works. How tied in are all the wires in the custom harness?



They are completely integrated.. I may have to just use a different harness and make home runs and see what happens.
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Retroracer
post Sep 16 2019, 08:55 AM
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..kind of what I was suggesting? Temporarily take the Petronix out of the equation to see if MSD + 6 cylinder work.

- Tony
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mb911
post Sep 16 2019, 04:26 PM
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I suppose it is. I will report back.
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sixnotfour
post Sep 16 2019, 04:33 PM
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I dont think its a pertronix problem, its the bundled wiring..add some leads like the directions above,,all mine are that way no problem..
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mb911
post Sep 23 2019, 04:22 PM
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So made home runs with the MSD harness and everything works as it should.. Crazy.
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sportlicherFahrer
post Sep 23 2019, 04:26 PM
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Sounds like it was interference from having them all bundled together then? Makes sense with how much is running through some of those wires.
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sixnotfour
post Sep 23 2019, 04:26 PM
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mb911
post Sep 23 2019, 06:52 PM
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I guess so.. Probably is to make it look nice now.
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sportlicherFahrer
post Sep 23 2019, 07:09 PM
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Retroracer
post Sep 23 2019, 07:49 PM
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Good to know you got to root cause though.

- Tony
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