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Oscilloscope from the video: https://aliclick.shop/s/562x80 Idle speed is floating. What is the reason? We will find out. It happens that the car's speed starts to float. It doesn't jerk, but rather floats. It could be an air leak, or an idle speed control, or an oxygen sensor... There could be a lot of reasons for an injection car, but we will try to find out most of them. Then it will be easier for us to find the fault, because we will know where to look! The engine speed is floating - reasons: 0:0:30 Air leak in the intake system 0:1:08 Clogged or leaking injector nozzles 0:2:02 Faulty ignition system (spark plugs, wires, coils) 0:2:50 Low fuel pressure, poor fuel pump 0:3:26 Low compression in the cylinder, compression measurement 0:3:54 Faulty throttle position sensor 0:4:48 Idle speed control - does not work or works poorly 0:6:25 Air flow sensor or absolute pressure sensor 0:7:07 Dirty electronic throttle 0:7:42 Faulty oxygen sensor So press the play button and watch! How to check the oxygen sensor • How to check the lambda probe. 4 Methods... How to check the MAF • How to check the MAF signs of malfunction... How to flush the injector • Injector flushing, How to flush the nozzle... Tired of paying for diagnostics? Ask for advice in the VK group https://vk.com/club_autotema