Reply To: After cleaning spark plugs, HR15 cranks but won’t start. What could be the problem?

› Forums › Car Problems & Maintenance › Nissan › After cleaning spark plugs, HR15 cranks but won’t start. What could be the problem?

May 10, 2025 at 8:20 pm #864
Dave

    If it was running before you cleaned them, my guess is either you damaged the plugs, or didn’t plug a coil pack back in.

    You should NEVER clean spark plugs. Plugs now a days are NOT thick enough to clean. If you have a misfire, normally you have a bad ignition coil. If your plugs are THAT bad, replacement is the only option.

    My guess is you ground off the end of the electrode and ruined one or more of the spark plugs.