Many face this problem: the warm-up revolutions are 1400 RPM. Instead of 1,600, idle speed is 600 instead of 750. At the same time, during the warm-up revolutions, can suddenly start to "swim" in the range of ± 400 revolutions. When the gas pedal is pressed, the speed shall normally be stabilized.
The first thing to do is to check if the vacuum tubes that are going to the throttle node are not damaged. Next, check that the mass flow sensor is fit.
To open a box with an air filter, you will need a 10 with an extension cord and a cracked key. The cover is bolted by two bolts. After the bolts are removed, the three tie-down handles will have to be loosened and the vacuum tubes removed from the air filter cover. After removal of the air filter cover, access to the throttle control shall be affixed to the four bolts. They need to be untailed, and you have to be prepared to make the throttle gaskets fall out. It's important not to lose it. After washing, the throttle control needs to be put in place. In 100 to 200 kilometres, the mileage shall be stabilized. During this period, the electronic throttle control will be re-educated, so the car can behave a little bit strange
