automatic transmission without overdrive (Dieselpartsworld) 2016-02-28    

automatic transmission without overdrive
fault analysis
About 100000km of the vehicle suddenly found no high-speed, automatic transmission without overdrive.
Do not rush to repair the engine and automatic transmission. In the long-term urban low-speed vehicles, easy to appear in the 100000km around three waycatalytic jam.
automatic transmission without overdrive
fault diagnosis
1) the hand test was significantly lower than the normal engine exhaust gas.
2) open air cleaner, remove the filter, such as speeding up the poor exhaust, there will be obvious exhaust gas reflux.
3) read the fault code, blocking the exhaust system exhaust emissions will cause the increase of EGR EGR into the valve, the valve does not work, light failure lights, and leave EGR valve does not work the fault code. Read data stream can be found in the large amount of waste gas discharged into the.
4) in determining the existing poor exhaust failure after further testing, rapid acceleration of exhaust tail tube as metal impact sound that inside of muffler insulation board welding, resulting in poor exhaust.
Rapid acceleration of the exhaust pipe is not clang is three waycatalytic jam.