Dacia Logan cars with 8-valve K7J and K7M gasoline engines (1.4 and 1.6 liters) have a signature disease – jerking, misfiring at low speeds, especially when shifting from 1st to 2nd gear. Many drivers change sensors, corrugations, and clean the throttle assembly to no avail, but the jerking problem persists. However, the solution to the issue of jerking during acceleration on K7J and K7M engines is quite simple.
