Checking injectors: Notes

Fig 1: Identifying Spark Plug

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Make a note of which cylinder each spark plug belongs to
• Remove all spark plugs.

  Check the color of the spark plug.

Is any spark plug lighter than the others? 

• YES 

  Refer to Replacing injector 

• NO 

  FAULT NOT FOUND:  Troubleshooting has been completed.