so, a while back, i wasnt getting spark to my engine. i then checked the grounds, and determined a grounding issue was causing my problem, as the secondary block ground was not connected to the back of the head. this solved the problem and my car started right up. after driving the car, and shutting the engine off, it would not start back up, and i further diagnosed it to not having spark. i had power to both the coil and the transistor, but no signal out of the coil. this led me to believe that my coil and or transistor were faulty. upon replacing both, i still have no spark, still having power to the coil and transistor, but not after the coil. my question is, what else could it be..?
another question that i have, and i may be just overthinking it, but is the coil base not supposed to be grounded out? as idont have the original basethat the coil was mounted on, is it supposed to be grounded?

oh, this is on a KA24DE. in an s13

 

oh, i got a code 21... could something simple like a blown fuse or a wanked relay cause this?