With the OBD- II system engine (Dieselpartsworld) 2016-02-28    

With the OBD- II system engine fault maintenance of 300 ~ 800r/min
Maintenance points:
With the OBD- II system engine, OBD- II system adopts high precision angle measurement method, to determine each cylinder ignition when the crankshaft rotation acceleration in each cylinder misfire condition monitoring engine.
At the time of starting and 1000r / min misfire rate reached 2 ~ 3% control unit will automatically close the cylinder of the injector and the spark plug (two collocated each cylinder, can close a), the engine start-up speed 200R / min, cylinder misfire rate between the 2% ~ 3% will burn out the TWC, the PCM module interrupt the cylinder fuel injection pulse signal.
The engine speed is 1000r/min, the cylinder misfire rate in 2% to 3%, will cause emissions exceed the standard, the PCM module interrupt the cylinder fuel injection pulse signal.
But will re open in the heavy load. So, with the OBD- II system of engine in idle speed and small load misfiring, high load short cylinder, the cylinder misfire.