Quote:
Originally Posted by Cobalt
I will say that I have seen far more CDI boxes of all eras fail then EZ69's. A common problem even today. I had 2 go on my SC's when they were only a few years old on 2 different SC's. These were actually a bigger issue but replacements were available unlike these. Many had the ability to buy Permatune units which failed even more than the CDI's and or other units which were easily swapped in unlike the EZ69 units.
Porsche was never known for its electronics and is a weak point still to this day.
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Obviously, there were many more non-turbos!
Actually, the 3 pin Bosch CDI, used until the late '70s, was very reliable and rarely failed. They typically failed because;
1. reverse battery connections
2. overcharging alternators
3. shorting the CDI coil signal while adjusting the idle.
The later CDI (6 pin) fails because of a marginal output capacitor, and the result of hotter engine compartment temperatures (200F+),
still not as hot as for turbos.