Fuel injectors are more susceptible to plugging on short-trip driven vehicles. This would involve a 15 minute drive followed by a 45 minute heat soak. Fuel injectors become restricted or plugged when olefins and diolefins (substances found in gasoline) accumulate around the injector pintle valve and nozzle and are baked on by intense heat. The result is a fuel flow restriction inducing performance-related problems. The symptoms may involve a miss, rough idle, surge or high emission output. With the metered orifice in the injector nozzle the diameter of a human hair, and deposits one tenth that thickness, performance problems are inevitable even with minor