14 what is the reason for the delayed misfire of Santana engine?

Too much carbon deposit on the throttle. Santana is a brand car produced by Volkswagen in California, USA. According to relevant data, too much carbon deposit in the engine throttle will lead to too large opening and closing angle, which will make the throttle flap stroke not smooth, and then Santana will delay the engine flameout at 14. The maintenance technician can open the engine compartment, remove the air inlet hose and the throttle valve, and check whether there is carbon deposit in the throttle valve.