How to solve the slow speed increase of Nissan Sylphy Classic?

1. Check whether the intake pipe leaks oil. Start the engine at low speed or idle speed, and then spray it with carburetor cleaner. If the intake pipe leaks air, the engine speed will automatically increase at the moment of injection. 2. Need to check whether the ignition time is too late. If it is too late, the mixture can not be fully burned, which will also affect the normal play of engine power, increase fuel consumption and overheat the engine. 3. Check the fuel injection system. In addition, the working conditions of throttle position sensor, EFI circuit and fuel injection pipe, valve clearance, spark plug and other components also need to be checked one by one.

1. Check whether the intake pipe leaks oil. Start the engine at low speed or idle speed, and then spray it with carburetor cleaner. If the intake pipe leaks air, the engine speed will automatically increase at the moment of injection.

2. Need to check whether the ignition time is too late. If it is too late, the mixture can not be fully burned, which will also affect the normal play of engine power, increase fuel consumption and overheat the engine.

3. Check the fuel injection system. In addition, the working conditions of throttle position sensor, EFI circuit and fuel injection pipe, valve clearance, spark plug and other components also need to be checked one by one.