2 parts covered
The fuel system stores, filters, and delivers fuel from the tank to the engine. Components include the fuel pump, fuel filter, fuel injectors, and fuel pressure regulator. Clean fuel delivery is essential for engine performance.
The fuel pump delivers fuel from the tank to the engine at the correct pressure. Most modern cars use an electric fuel pump mounted inside the fuel tank. When it fails, the engine won't start or will stall while driving.
Total Cost
$400 – $1,000
Lifespan
100,000 – 200,000 miles
DIY Difficulty
If It Fails
Spark plug wires (also called ignition cables or HT leads) carry high-voltage electricity from the distributor or ignition coil to the spark plugs. Modern cars with coil-on-plug ignition don't have traditional spark plug wires.
Total Cost
$50 – $200 (set)
Lifespan
60,000 – 100,000 miles
DIY Difficulty
If It Fails