Quote:
Originally Posted by Fred Winterburn
I would like to know the absolute reason why CDI is not used in a COP system anymore (other than Saabs older system).
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Fred
It is not used mainly due to cost and service interval. There is another not well understood problem with COP/Pencil coils when used with cdi ignition due to their less than ideal magnetic properties (simplified) although we have noticed recently the changes to Bosch pencil coils which should reduce/eliminate the problem.
SAAB used cdi originally as it allowed them to more easily implement spark plug ion current monitoring for knock detection however now there are a number of inductive ignition coils with this feature built in such as those used by Haley Davidson.