Question 4866
If an increase in a vehicle's fuel consumption is observed, what should be checked?
- The ignition system and the fuel supply system.
- The cooling system and the lubrication system.
- The exhaust system.
Show answer and explanation
Correct answer: The ignition system and the fuel supply system.
If you notice your car using more fuel than usual, check the ignition and fuel supply systems first, because they determine how well the air-fuel mixture burns. Worn spark plugs or a dirty air filter make the engine less efficient and increase fuel consumption.