What Causes the Mazda Atenza's Throttle to Be Sometimes Light and Sometimes Heavy?

1 Answers
DeElena
07/29/25 5:55pm
Here are the specific reasons why the Mazda Atenza's throttle may feel sometimes light and sometimes heavy: 1. Carbon buildup issues: Including carbon deposits in the cylinders, throttle body, spark plugs, and intake system. When there is excessive carbon buildup inside the engine, the vehicle's ignition energy decreases, intake efficiency drops, ultimately leading to reduced engine power and weak idling. 2. Fuel system: Using an incompatible fuel grade, resulting in decreased vehicle output power and reduced performance; or due to a blocked fuel tank vent, clogged fuel tank switch, fuel filter, or fuel lines between the fuel tank and carburetor, which cannot supply the required amount of fuel, leading to a lean air-fuel mixture and weak engine acceleration. 3. Intake system: If the air filter is not cleaned in time after long-term use and becomes clogged, insufficient air volume will cause an overly rich air-fuel mixture, reducing engine power; for vehicles with turbochargers, if the turbocharging device fails, it can also lead to reduced engine power or weakness. 4. Engine overheating: Insufficient engine oil, low engine coolant, or malfunctioning engine cooling system can all increase the engine's load, leading to poor engine cooling. Engine overheating can result in poor lubrication, increased mechanical wear, reduced engine power, and higher fuel consumption.
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