Hi, I have been having issues with a poor running 89 that is very sluggish. acts likeit is on 3 cylinders much of the time. I have rebuilt the carbs, synced them with a tool, and installed new plug wires, caps and plugs, checked the pickup connectors, and cleaned up the TCI connectors. All cylindars fire but many seem weak and for 1 cylinder in particular I can remove the plug wire while idling and it barely changes the idle.
Due to another issue I was able to get to my coils & TCI. Upon inspecting the coils I found that 3 of them have cracks in the housing at the top of the body on the mold parting line. Does this indicate that they are bad or weak? Would the cracks affect the delivered spark?
Thanks in advance!