The reason for the idle speed and the engine is not stable at idling speed may be many. If the engine idling is not stable, there are two ways:
1. Run computer diagnostics on the service
2. Try to find the cause of the unstable engine work independently
A multi-meter instrument will be required for stand-alone engine diagnostics.
The first thing to do is check the mass flow sensor (MRI). If the voltage on the sensor is higher than the applied sensor, replace the sensor. Also about the failure of the MRI may be the sign of a black sunburn on the candles. Attempts to clean up the old DMV typically do not produce results and continue to swim.
Also, check the speed sensor and the crankshaft position sensor. There is rarely a problem with the BCPR, but it makes sense to check the integrity of its chips and transactions.
The next step is to remove and clean the throttle control and idling speed (RXX) and check the throttle position sensor (PDA).
The high voltage wires can also be tested. They, like the spark plugs, need to be changed from time to time.
