ignition coil longevity...?
Drifting
Joined: May 2001
Posts: 2,747
Likes: 3
From: Owasso, OK
Bob,
Agreed, there is less voltage due to starter draw but it is still more than the run voltage. At least it is on the early 928's. It's possible they go from years of vibration and the over cranking (more than 10 seconds) finishes them off.
Telling my age here, but when US cars were switching over from 6 to 12 volts they used the same coil.
BTW there are two ballast resistors on the early 928's (one for crank and two for run).
Dennis
Agreed, there is less voltage due to starter draw but it is still more than the run voltage. At least it is on the early 928's. It's possible they go from years of vibration and the over cranking (more than 10 seconds) finishes them off.
Telling my age here, but when US cars were switching over from 6 to 12 volts they used the same coil.
BTW there are two ballast resistors on the early 928's (one for crank and two for run).
Dennis
Drifting
Joined: Nov 2001
Posts: 2,233
Likes: 1
From: zürich, switzerland
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Testing for spark while holding a plug wire an inch from ground is another way.
Marton
Three Wheelin'
Joined: Dec 2005
Posts: 1,822
Likes: 1
From: In the boatyard installing the mast and engine, we don't need a crane, we harness the mesquito's! Yeah!
I remember holding the spark lead just off the plug on the Rambler once...
Seems the insulation on the plug wire was a bit weak...
I lit up!
Ya better be tough if'n your gonna be stupid
BTW - I just burned out a coil - I left the ignition turned on while I walked to the house for a volt meter (and forgot about it for 15 minutes)- you could smell that baby when I got back.....
