Why does my car need a tune-up?
What a Tune-Up Does
Modern tune-ups typically include replacing spark plugs, checking ignition coils and wires, replacing the air filter, and inspecting fuel and emission systems. On older cars, it also included adjusting timing and carburetor.
Worn spark plugs can cause misfires, rough idle, and poor acceleration. A dirty air filter restricts airflow, reducing power and fuel economy.
A tune-up helps your engine run efficiently, which can improve gas mileage and reduce emissions. It also helps prevent breakdowns and costly repairs.
When You Need One
Follow your owner's manual for recommended intervals, which can range from 30,000 to 100,000 miles depending on the type of spark plugs and ignition system.
Symptoms that suggest a tune-up is due include rough idle, hesitation during acceleration, decreased fuel economy, engine misfires, and difficulty starting.
Even if your car runs fine, sticking to the maintenance schedule can catch small issues before they become big problems.
- Rough idle or shaking
- Hesitation or sluggish acceleration
- Decreased fuel economy
- Engine misfire or check engine light
- Hard starting
Common mistakes
- Thinking modern cars don't need tune-ups; they still need periodic ignition and filter maintenance.
- Waiting for symptoms to appear before doing maintenance; preventive tune-ups save money and downtime.
- Confusing a tune-up with an oil change; they are different services with different intervals.
