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DSM DSM is offline
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1977 Porsche 930 CDI, Power with key off?

With the key off I'm getting battery voltage between pin 8 & 6 at the connector. Any idea why?

Also, can anyone recommend a good CDI rebuild vendor? Thank you!



Last edited by DSM; 04-18-2016 at 09:49 AM..
Old 04-18-2016, 09:43 AM
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PermaTune makes CDI copies , give them a call they are very good people to work with.
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Old 04-18-2016, 11:19 AM
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Pelican has a CDI repair through Bob Ashlock. $200 includes free return shipping. I had my 8 pin box done last year, and just received my 2 6 pin boxes back. Turnaround was a few weeks.
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Old 04-18-2016, 11:25 AM
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Ok, so it must be the condenser providing the voltage. With the key off after 12 hours it was down to 10.8 volts. Turn the key on and 13+ volts. Wanted to make sure all was working properly. That explains the voltage with key off but no high pitch sound from CDI. Maybe it just needs to be rebuilt?

Thanks for the replies!
Old 04-18-2016, 03:26 PM
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Quote:
Originally Posted by DSM View Post
With the key off I'm getting battery voltage between pin 8 & 6 at the connector. Any idea why?
I would suspect trouble in the Delayed Action Relay department. Pull it and see if the voltage at pin 8 goes off with the key off.
Old 04-18-2016, 03:50 PM
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Anyone ever used one of these refitted cdi units? Any good?

https://www.************.com/p-1799-bosch-8-pin-cdi-refitted.aspx
Old 04-18-2016, 04:42 PM
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Yep, if it is less than batt volts, it must be the external capacitor voltage.

Quote:
Originally Posted by DSM View Post
Ok, so it must be the condenser providing the voltage. With the key off after 12 hours it was down to 10.8 volts. Turn the key on and 13+ volts. Wanted to make sure all was working properly. That explains the voltage with key off but no high pitch sound from CDI. Maybe it just needs to be rebuilt?

Thanks for the replies!

Old 04-18-2016, 06:05 PM
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