Lova Engine Jerking Acceleration

I recall a similar issue with my Chevrolet Lova. Your symptoms resemble a faulty oxygen sensor downstream from the catalytic converter. Have you checked the sensor's output voltage for irregularities? An aberrant signal could induce engine misfire and jerking. Does the issue correlate with engine load or temperature? Are the spark plugs in good condition?

Thanks for the quick reply. I haven't thoroughly examined the oxygen sensor's output voltage under varying engine loads and temperatures yet, but I'll prioritize that. What specific parameters or ranges should I observe to check the sensor's integrity? The spark plugs were last replaced about 20,000 km ago.

Check the oxygen sensor voltage fluctuations; they should oscillate rapidly between 0.1V and 0.9V. A sluggish or static signal often indicates a malfunction. Inspect the spark plugs for wear since they have 20,000 km on them. However, the exhaust leak remains a strong suspect, potentially skewing the oxygen sensor readings. If the error code points to the exhaust system, get the car inspected by a workshop.

Thanks for the guidance. A technician confirmed a minor exhaust leak near the catalytic converter. Repairing it, including welding and replacing a gasket, cost 265€. The car now operates without issue. Your insights helped speed up the diagnosis and prevent complications.