aaddpp

In this previous thread - https://rennlist.com/forums/928-foru...testing-2.html - the need to ground the coils was discussed when doing compression testing. My understanding is that on my car, whenever you spin the starter - whether it be via the ignition key or the 14 pin connector, the coils will charge and without a path for dissipation of the charge, damage could occur.

Right now I have removed the plug cables, distributor rotor / cap and TB covers...so I have no way to ground through the spark plugs. I want to spin the engine on the starter per Kens instructions as part of the Prokensioner install. It will also allow me to remove a "?" proposed in dealing with an engine timing disagreement (https://rennlist.com/forums/928-foru...agreement.html).

One method called for grounding the coil wires (aka???: ignition lead - 928 602 039 00), but I am not sure how to do this. As a guess, I would ask if you can use a wire of sufficient gauge, and alligator clip it to the coil-wire-lead tip, and then to a ground point on the car - but that's just a guess. Any precaution necessary to ensure safety. Photo would be excellent if someone had one handy.

Sorry for the need to be spoon fed here, but I don't know electrics very well, and I know even less about automotive ignition systems. If it was just the coils, I would take a chance and get a new set if they failed, but it sounds like I could do damage further upstream.

Thanks,
Dave

dr bob

Pull the EZK fuse before cranking on the starter. No primary power to the ignition system makes the coil grounding issue moot.

aaddpp

Thanks Dr. Bob. This approach is so simple and quick.

Why such a different approach here vs. the need to provide an outlet for the charge when performing a compression test (as per the thread accessible via the first link).

Thanks,
Dave