The car just changed the oil filter, cleaned the air inlet and injector, and then accelerated less quickly than before, and the engine was louder. What happened?

In winter, the demolition-free effect is not good, and the temperature is not clean enough.

Besides, you should study after cleaning. At present, the fine control of cars is done by ECU, and the luxurious one is also single chip microcomputer, which makes conditional reflex according to different data streams. Conditional reflex of important conditions, such as throttle opening, can achieve good performance if dirt is 5, cleanliness is 1 and cold is 2. However, if the actual 5 is set to 1, the ECU is told that the throttle valve is opened at 5. This is the setting. Although the throttle will give an alarm to show that it is out of the adjustment range, which requires a certain degree of error, but the driver can't stand it.

Electronic throttle is different from basic throttle. The electronic throttle only needs to clean the doorway that matches the door shaft (note that some electronic throttles do not wash off the door glue); In addition to the part of the basic throttle that needs electronic throttle cleaning, there is also an idle valve that needs to be disassembled and cleaned.

Unless it is an off-site cleaning nozzle, if it is also disassembled, the effect may not be good. It is generally good to wash the nozzle externally to dissolve the carbon deposits attached to the surface, but it must not be wiped, and it can be dried after dissolution. But internal cleaning is more troublesome. It is necessary to use a specific solvent to dissolve the internal carbon deposits and flow them out. If necessary, it is necessary to open the needle valve, use a solvent with a suitable flow rate to flow through the nozzle for cleaning, and what is even more frightening is to heat it properly.

Finally, cleaning the valve also requires temperature. Rinse it with water-based foam cleaner, foam it, pump out the residual liquid and reinstall it. After waiting for the car to warm up again, make a bottle to strengthen the cleaning of non-key areas. Go out and pull a high speed to complete the cleaning.