What is the slow speed of Yinglang gearbox with 2 liters and 3 gears?

Improper adjustment of throttle cable or throttle position sensor in Pacific Auto Network; The governor is faulty; The sealing ring of the oil inlet and outlet hole of the governor on the output shaft is damaged; Improper adjustment of vacuum throttle push rod in automobile maintenance; The vacuum hose or vacuum diaphragm of two kinds of vacuum throttle valves leaks air; The oil pressure of the main oil circuit of the full hydraulic vacuum throttle valve or the oil pressure of the throttle valve is too high; Forced downshift switch is short-circuited; Sensor failure.

Troubleshooting for slow upshift of automatic transmission;

(1) Automatic transmission upshifts slowly. When the car is driving, the upshift speed is fast and the engine speed is high. Before upshifting, the accelerator pedal must be released to upshift the automatic transmission.

(2) The reason why the automatic transmission upshift is slow is that the throttle cable or throttle position sensor is improperly adjusted; The governor is faulty; The sealing ring of the oil inlet and outlet hole of the governor on the output shaft is damaged; Improper adjustment of vacuum throttle push rod in automobile maintenance; The vacuum hose or vacuum diaphragm of two kinds of vacuum throttle valves leaks air; The oil pressure of the main oil circuit of the full hydraulic vacuum throttle valve or the oil pressure of the throttle valve is too high; Forced downshift switch is short-circuited; Sensor failure.

(3) Troubleshooting methods for slow upshift of automatic transmission should be fault diagnosis of electronically controlled automatic transmission. Check and adjust the throttle cable or throttle position sensor, measure the resistance of the throttle position sensor, and replace it if it does not meet the standard.

For automatic transmission with vacuum throttle, check the vacuum hose for leakage. Check the forced downshift switch for short circuit. Measure the oil pressure of the idle main oil circuit. If the oil pressure is too high, it should be adjusted by throttle cable or throttle position sensor. Automatic transmission with vacuum throttle should be adjusted by reducing the length of throttle push rod. If the above adjustment fails, remove and check the oil pressure valve or throttle valve. Measure the oil pressure of the governor. The oil pressure should increase with the increase of vehicle speed. Compare the governor oil pressure measured at different speeds with the specified value. If the oil pressure is too low, it indicates that the governor is faulty or the oil circuit of the governor is leaking. At this time, the automatic transmission should be disassembled for inspection to check whether the governor fixing screw is loose, whether the governor oil circuit sealing ring is damaged, and whether the valve core is stuck or excessively worn. If the oil pressure of the governor is normal, the reason for the slow upshift may be that the shift valve is not working properly.

The valve body should be disassembled for inspection and replaced if necessary.