Checking the spark plugs

WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Ignition Switch OFF Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Remove the spark plugs from all cylinders. Keep them in order.
Compare the spark plug from the poor cylinder with the rest of the spark plugs.

Check if this spark plug shows signs of wear and if it is of a lighter color than the others.

Alternative:
1. The spark plug is OK.
  Refer to Checking spark
2. The spark plug is worn.
  Refer to Replacing all spark plugs
3. The spark plug is of a lighter color.
  Refer to Replacing a fuel injector
Fig 2: Identifying Spark Plug
Courtesy of VOLVO CARS OF NORTH AMERICA.

Select alternative according to above.