Why is my Suzuki Cultus consuming more fuel after replacing the spark plugs?

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Why is my Suzuki Cultus consuming more fuel after replacing the spark plugs?

An increase in fuel consumption after replacing the spark plugs could indicate a few issues:

Incorrect Spark Plug Gap: If the gap on the new spark plugs is not set correctly, it can cause inefficient combustion, which might result in the engine burning more fuel to produce the same amount of power.

Dirty o r Faulty Fuel Injectors: If the fuel injectors are clogged o r malfunctioning, they may deliver too much fuel to the engine, leading to excessive fuel consumption. A faulty fuel injector may need to be cleaned o r replaced.

Improper Spark Plug Choice: Using the wrong type of spark plugs wrong heat range o r type can also affect fuel efficiency. It’s important to use the spark plugs that are recommended for your Suzuki Cultus model.

Air-Fuel Ratio Issues: Problems with the mass air flow MAF sensor o r oxygen sensors can cause the engine to run richer than necessary, leading to higher fuel consumption. These sensors help the engine control unit adjust the air-fuel mixture for optimal combustion.

To solve this issue, check the spark plug gap, inspect fuel injectors, and ensure all sensors and components related to the air-fuel mixture are functioning correctly.

Gari Specialist asked on 08 Apr 2025 17:05:25 pm

1 Answer

19 views |

Gari Master - on 08 Apr 2025 17:10:09 pm

If you notice an increase in fuel consumption after replacing the spark plugs, it could be due to the following reasons:

Incorrect Spark Plug Gap: If the spark plug gap is set incorrectly either too wide o r too narrow, the spark might not be efficient enough, leading to incomplete combustion. This inefficiency requires more fuel to achieve the same power output, resulting in increased fuel consumption.

Faulty Fuel Injectors: If the fuel injectors are clogged o r malfunctioning, they may deliver an incorrect amount of fuel to the engine, leading to higher fuel consumption. Faulty injectors may deliver too much fuel, causing the engine to burn more fuel than necessary.

Air-Fuel Ratio Imbalance: Issues with the MAF sensor, oxygen sensors, o r fuel pressure regulator can cause the air-fuel ratio to become unbalanced, leading the engine to run richer than necessary. This will increase fuel consumption.

Incorrect Spark Plug Choice: Using spark plugs with the wrong heat range o r design can affect combustion efficiency and fuel economy. It’s essential to use the manufacturer-recommended spark plugs for your specific Suzuki Cultus model to avoid performance issues and fuel inefficiency.

To solve this issue, ensure the spark plug gap is set correctly, check for fuel injector problems, and verify that all sensors related to the air-fuel mixture are functioning properly.