Chugging at low speeds in your 2002 Seat Leon 20VT could be caused by several issues. It might be related to fuel delivery problems, such as a clogged fuel filter or failing fuel pump, or ignition issues like worn spark plugs or ignition coils. Additionally, check for any vacuum leaks or problems with the throttle body. A diagnostic scan could help identify any underlying issues even if warning lights are not on.
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