The Magotan idling meter shows that the fuel consumption was 0.9 before, and now it is 1. 1?

According to the description, the fuel consumption of vehicles is higher now than in the past. Check whether the spark plug of the ignition system is ablated, then check whether the throttle valve of the intake system is too dirty to cause the intake air to exceed the specified range, finally check the oil pressure of the fuel injection system and the working effect of the injector, check whether the lubricating performance of the lubricating system oil is degraded, and finally check whether the engine fuel consumption is increased due to excessive carbon deposition.