Working on a 97 550 cougar. Put on new track and test drove fine. Brought back in shop and cleaned carbs and started running poor. rechecked carbs and restarted, still running poor. went thru everything one more time and went to restart and had absolutely no spark. coil test good. stater good. can a CDI box quit that quickly? Checked all grounds feel like I'm missing something very simple. What have you guys run across that can wiggle loose or become disconnected? Can I test CDI box? Thanks for anything