Auto Maintenance: Spark Plug Replacement

SPARK PLUG REPLACEMENT

Spark plugs ignite the fuel in your engine and create the energy to power your vehicle.  If they’re not working properly the engine might not run at all or cause serious expensive damage to your vehicle. 

HOW IS SPARK PLUG REPLACEMENT DONE?

First you need to remove covers and any other components blocking access to all the spark plugs.  Then carefully remove the wires and spark plugs from the motor, making sure the engine has cooled first.  Remove the spark plug cable from the top of the spark plug, then unscrew them from the engine and examine them. If they are no longer functioning, they will be either coated with carbon or damaged. 

WHEN IS IT TIME TO REPLACE THE SPARK PLUGS?

At the very minimum the spark plugs should be changed based on manufacturer recommendations.  Spark plugs are designed to last a certain number of miles and even though there may be no signs of fatigue they can still be incrementally damaging other components.  There are several signs that it is time to replace your spark plugs and possibly wires. One of the most common signs is your engine will start to misfire or idle roughly. Other signs include trouble starting the engine in the morning, uneven acceleration and poor fuel economy. If you are experiencing these problems, you should have it looked at right away to avoid damage to other components such as catalytic converters. 

RECOMMENDATIONS

Spark plugs are such a vital component of your vehicle it is critical to keep them well maintained. Your owner’s manual should have a recommendation as to how often your spark plugs should be replaced.

AVERAGE COST

There are several factors that might affect the cost of your spark plug replacement. Approximately $100 to $600 depending on how difficult it is to get to gain access to the plugs.