Fault phenomenon: a 2011 year Changan Ford produced Mondeo's new winning luxury sports car, loaded with Ford's new EcoBoost series 2.0L turbocharging / cylinder direct injection gasoline engine and PowerShift 6 speed double clutch transmission, configuring a touch single screen DVD entertainment and navigation system for a new 1100 km new car, The owner reflects the engine's idle speed jitter and accelerates its weakness.