What if the fuel correction system is too rich?

Check the cleanliness of the throttle. If the throttle is too dirty and there is carbon deposit, it is necessary to carefully clean the carbon deposit in the throttle and air intake.

Check whether the three-way catalytic converter is blocked. If it is blocked, clean it with special cleaning agent first. If the effect is not good, a new three-way catalytic converter needs to be replaced.

Remove the spark plug and check whether there is too much carbon deposit. If there is too much carbon deposit, clean the spark plug. After cleaning, check whether the spark plug works normally. If the spark plug is abnormal, replace it.

Extended data:

Precautions:

When the fuel pressure regulating valve N276 doesn't work, the electronic accelerator (EPC) light will light up, and the vehicle will slowly accelerate during the road test. Even if the accelerator pedal is pressed to the end, the engine speed is only about 3000 r/min. Installed on the fuel high-pressure pump, because the fuel pressure regulating valve N276 is a high-frequency solenoid valve, it can't be energized, otherwise it will cause N276 to burn out.

When disassembling and assembling the high-pressure injector, the tetrafluoroethylene sealing ring must be replaced. When installing the tetrafluoroethylene sealing ring, the tetrafluoroethylene sealing ring should expand when pushed onto the high-pressure injector. The sealing ring must shrink after being pushed into the sealing groove of the high-pressure injector, otherwise the tetrafluoroethylene sealing ring is unqualified. Special tools T 10 133/7 are needed to assemble and disassemble the first sealing ring, and T 10 133/8 is needed to assemble and disassemble the second sealing ring.

Baidu encyclopedia-fuel system