Hi !!
I have a nissan d21 with the z24s 4 spark plug engine , carburetor , point ignition.
My problem is weak spark on the plugs and definitely bad/faulty ground somehow/somewhere.
I keep burning condensers and points twice a month.
I replaced ignition coil , condenser , points, all cables , all new.
New ground cable from battery to chassis/engine , engine to chassis , new ground cable from transmission to chassis .
When i hold one hand on the High tension wire from ignition coil to distributor ,(engine running),and the other hand on some point on the chassis i can feel weak current ,(not strong but it is there).
Replaced that wire with new 2 times and the same happens.
Dont know what else to do,, and the worst thing is that there is no diagram for my model on the internet...only for electronic ignition and TBI...it realy sucks.