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19-01-2021, 05:38   #1
Noelie13
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1980 Porsche 924 no spark

Hi everyone. I'm stuck with getting my 924 (2.0ltr) to start. It turns over perfectly, but I have no spark. There is very weak power at the live connection on the ignition coil. If I run a direct live from the battery it will start and run for a few seconds then cuts out. I've checked all fuses and they are good. Just wondering has anyone come across this before?
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19-01-2021, 08:56   #2
Redriddick
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Quote:
Originally Posted by Noelie13 View Post
Hi everyone. I'm stuck with getting my 924 (2.0ltr) to start. It turns over perfectly, but I have no spark. There is very weak power at the live connection on the ignition coil. If I run a direct live from the battery it will start and run for a few seconds then cuts out. I've checked all fuses and they are good. Just wondering has anyone come across this before?
Bad earth??
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19-01-2021, 09:11   #3
kadman
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Ditto.

Bad earth at battery, engine to gearbox or engine /gearbox to chassis if fitted.
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19-01-2021, 10:59   #4
T5180
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By weak power at the coil do you mean less than 12volts? Is there is a ballast resistor on the supply to the coil ? if so ,that would explain why .
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19-01-2021, 14:58   #5
Noelie13
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From what I can see it does not have a balist resistor. I have a wiring diagram in a Haynes manual. It has a transistor ignition unit (ignition module) I have 12v and good ground at it but only about 3v at the live terminal at the coil. I am thinking of getting a second hand one off eBay and seeing does that cure it.
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