NO-NO screwdriver etc!..............................
That will do harm to the 'puter. There was, at one time an AMC notice about do'n just this.
Use an inductive timing light to check for spark.
The coil should be a little hotter to the touch, than you can hold is all.
By following my procedure while watching the accelerator pump squirt.
LG what in the world are you talking about? Unless your really stupid, will you blow up anything computer related. And that involves removing the coil wire from the coil and turning over the engine and having a spark jump out of the coil center and zap the green wire on the coil.
There was a TSB sent to NOT do this with the direct fire to block as it could damage a sensor/'puter/etc . THAT'S WHAT I'M TALK'N ABOUT!
I'm also talking about intermittent ground arcing("leaking")from old spark plug wire due to high resistance from the old wires. this will cause a coil to over heat as you are 'shorting' the coil.
BTW, best to do the 'test' with an old spark plug touching the block and not a screwdriver jammed into the plug wire.
I assume "your' means, someone trying to jump a spark to the negative on the coil. Not directed to anyone in particular.
I have read about this in my Chevy Astro FSM wich has a GM HEI distributor.
At one time the procedure to check to see what cylinder is misfiring is to pull the wires on each cylinders one by one.
Unfortunately the spark can jump to various points inside the distributor because it's close to ground inside the distributor and the spark is so big.
The actual test says to ground each spark plug wire one by one so no spark can jump around inside the distributor.
It can actually burn a hole through the rotor to ground to the distributor shaft.
Not to mention jumping to various points on the ICM inside the distributor.
I'm not sure a timing light will actually show the quality of the spark being generated. Just if some energy is traveling through the wire.
I actually have used a small engine spark tester without any problem on the CJ.