Thread: 911SC no spark
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Join Date: Apr 2009
Location: Radcliff, Kentucky
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Quote:
Originally Posted by ischmitz View Post
I can only speed for a Bosch CDI box. I assume it makes its distinct whine when powered.

With a spark plug hooked up directly to the coil output and grounded it needs to produce a spark assuming your trigger signal is present during cranking. If not the CDI box needs repair or the coil is no good.
Ingo,

The CDI+ does a nifty tach sweep to let you know it has power. No loud whine, though. I kind of miss it, but enjoy the reliability.

Regarding the trigger signal, Jonny at Classic Retrofit has been going through this with me and he pointed out the CDI+ has a green LED beneath the top mounting bolt that flashes with signal. I have signal.
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1980 911SC Targa • Petrol Blue Metallic • Cork special leather • Sport Seats • Limited Slip • 964 Cams • SSIs • Rennshifter
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Old 08-15-2025, 09:28 AM
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