What are the symptoms of a faulty exhaust valve in the BYD F3?

2 Answers
AmeliaDella
07/28/25 10:50pm
Symptoms of a faulty exhaust valve in the BYD F3 include: 1. Unstable idle; 2. Poor acceleration; 3. Increased fuel consumption; 4. Insufficient power. Taking the 2020 BYD F3 as an example, it belongs to the compact car category, with body dimensions of: length 4533mm, width 1705mm, height 1490mm, wheelbase 2600mm, and a fuel tank capacity of 50 liters. The 2020 BYD F3 features a front MacPherson independent suspension and a rear torsion beam non-independent suspension. It is equipped with a 1.5L naturally aspirated engine, delivering a maximum horsepower of 109 PS, maximum power of 80 kW, and maximum torque of 148 Nm, paired with a 5-speed manual transmission.
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VonLevi
08/12/25 3:18am
I've been driving a BYD F3 for several years, and when the exhaust gas recirculation (EGR) valve fails, the most obvious symptom is unstable idling. When parked, the engine shakes like a massage chair. When accelerating, it always feels like stepping on the gas pedal has no power, and the performance drops significantly. Fuel consumption inexplicably increases—previously, a full tank could last 500 kilometers, but now it might only go 450, wasting extra money. Sometimes the dashboard lights up with a warning indicator, and you can even smell burning oil inside the car, as if untreated exhaust fumes are leaking in. If not repaired promptly, the engine oil consumption becomes abnormally high, requiring top-ups every few thousand kilometers, and it’s prone to carbon buildup clogging engine components. Last time I encountered this issue, I quickly replaced the valve, saving hundreds in repair costs. In short, don’t ignore these symptoms—get them checked by a professional shop as soon as you notice them. Spending a little to fix a minor issue can prevent major damage.
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