A car tune-up is a maintenance service designed to restore your engine's performance and efficiency. It typically involves replacing worn-out parts like spark plugs and filters, inspecting key systems, and making adjustments to ensure the engine runs smoothly. While modern cars with electronic ignition and fuel injection require fewer traditional tune-ups, this service remains crucial for addressing rough idling, poor acceleration, and decreased gas mileage.
The core components of a standard tune-up include:
- Spark Plugs: Worn plugs cause misfires, reducing power and fuel economy.
- Air Filter: A clogged filter restricts airflow, forcing the engine to work harder.
- Fuel Filter: A dirty filter can limit fuel flow, leading to performance issues.
- Ignition System: Wires and coils are checked for proper voltage delivery.
- Fluid Levels: Engine oil, coolant, and other fluids are inspected and topped off.
Mechanics also often perform a computer diagnostic scan to check for error codes and assess the engine's vital signs. The benefits are immediate: you'll notice a smoother ride, more responsive acceleration, and often better fuel efficiency. For older vehicles, a tune-up might be needed every 30,000 miles, but always consult your owner's manual for the manufacturer's specific schedule.
| Common Tune-Up Components | Purpose & Impact when Worn |
|---|
| Spark Plugs | Ignites the air-fuel mixture. Misfires, poor acceleration, reduced MPG. |
| Air Filter | Cleans air entering the engine. Reduced power, poor efficiency. |
| Fuel Filter | Screens contaminants from fuel. Engine hesitation, stalling. |
| PCV Valve | Manages engine crankcase pressure. Sludge buildup, rough idle. |
| Ignition Wires/Coils | Delivers voltage to spark plugs. Engine misfires, hard starting. |
