HEI Install Problems

Thank you. A lot of people are using the 8 PIN and don't seem to be having problems. However, I am having some issues and I'm wondering if this could be the problem.
Do you have a thread? If not start one many here are very willing to help.
8 pin from what I’ve read seems to be preferred, more tolerant of voltage variations and I like the connectors a little better. First thing most will ask is check for full voltage and check or try switching wires to distributor (polarity).
Also need a good ground, one other thing is electronic noise be sure wires from module to distributor are twisted and routed away from any other wires best you can. Or you can also add shielding.