What Causes Lack of Power During Acceleration in the Regal?

2 Answers
McBrady
07/24/25 1:05am
Reasons for lack of power during acceleration in the Regal are as follows: Engine Carbon Buildup: Carbon deposits include cylinder carbon buildup, throttle valve carbon buildup, spark plug carbon buildup, and intake carbon buildup. These areas are directly related to the engine's power output. When excessive carbon accumulates inside the engine, the vehicle's ignition energy decreases, intake efficiency drops, ultimately leading to reduced engine power and symptoms like shaking and lack of acceleration power. Fuel System Malfunction: Using incompatible fuel octane ratings can cause a decrease in the vehicle's output power and reduced performance. Alternatively, if the fuel tank cap vent is blocked, it may fail to meet the required fuel supply, resulting in an overly lean air-fuel mixture and lack of engine acceleration power.
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DeEverly
08/10/25 8:46pm
I've been driving the Regal for a while, and the lack of acceleration is really frustrating. Common causes could be insufficient fuel supply to the engine, such as a weak fuel pump, dirty or clogged fuel injectors, or a need to replace the air filter, which restricts airflow and affects combustion efficiency. The ignition system is also crucial—old spark plugs or faulty ignition coils can lead to weak sparks and reduced power. Too much carbon buildup in the engine can also hinder performance; if not cleaned regularly, incomplete combustion occurs in the cylinders. A clogged exhaust system, like a dirty catalytic converter, can prevent exhaust gases from escaping. Low tire pressure or a stuck brake system are also common issues. Personally, I think you shouldn't delay addressing acceleration issues—check if the warning light is on. If it's an automatic Regal, the shift timing might be off. Regular maintenance is key; don't use low-quality fuel, as dirty gasoline can cause these problems. Safety first—if the car feels unstable, don't push it. Get a professional diagnosis.
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