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The fuel system quietly does a lot of work. When it starts to struggle, you notice hard starts, stalling or poor fuel economy, and sometimes a check engine light. Some fuel problems are cheap fixes, while others, like a fuel smell, should not wait. This page explains the common repairs and what they typically cost.
Last updated: October 2026
The pump moves fuel from the tank to the engine. A weak one causes hard starting, stalling or loss of power under load.
Keeps dirt and water out of the injectors. Some vehicles have a serviceable filter, others build it into the pump.
Dirty or failing injectors cause rough idle and poor economy. Cleaning can help in early stages.
Fuel line leaks and vapour system faults. A loose or worn gas cap is a very common cause of a check engine light.
Typical ranges only. The fuel pump is often inside the tank, which adds labour.
Engine cranks but is slow to fire, often a pump or pressure issue.
Can come from a clogged filter or a weak pump.
Dirty injectors or a faulty sensor can waste fuel.
A pump that is starting to wear out.
Treat it seriously. A leak is a fire risk, so stop driving and get it checked.
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Yes. A loose or damaged cap can cause an EVAP system code. Tighten it until it clicks and the light often clears after a few drives.
Some cleaners can help mild deposits, but they will not fix a failing pump or a clogged filter. If you have symptoms, get it diagnosed rather than guessing.
Many last 150,000 km or more, but running the tank very low often can shorten their life since the fuel helps cool the pump.
Keep the tank at least half full to reduce condensation, and buy fuel from busy stations. A shop can advise on additives if you have had water issues.