Can a bad ground cause no spark? Absolutely! A bad ground can interrupt the electrical flow, preventing your ignition system from firing properly. Without a solid ground connection, the spark plug can’t get the voltage it needs to ignite the fuel-air mixture, leaving you with a frustrating no-spark situation. So, if you're scratching your head over a no-start issue, checking the ground might just be the simple fix you need to get back on the road!