Mercedes Ke Jetronic- CO/mixture screw adjustment(air-fuel ratio adjustment) Sensor plate adjustment

Mercedes Ke Jetronic- CO/mixture screw adjustment(air-fuel ratio adjustment) Sensor plate adjustment

In this video we are going to talk again about the mechanical part of the system. Along the fuel pump, distributor, pressure accumulator and the injectors one of the precondition for a healthy mechanical KE-Jetronic system is also the air flow sensor. Among its sensor plate which mustn't rub the edges of its housing the second precondition for its healthy operation is also the CO- or the mixture screw adjustment. These things normally never have to be touched but if there was some idiot mechanic who knew "very much" about the KE-Jetronic system, then you can experience this issue. The sensor plate by deflecting normally has a gap before it starts moving harder. This gap has to be 1-3mm, the ideal one is 1,9mm.
In this video you will see how the CO/mixture screw is regularly being adjusted. If out of any reason someone messes up with this adjustment he is going to either make the the sensor plate become tight or very loose. In any case of these two the car will not be able to start. These adjustments will have the effect on the mixture as well. In any case, don't panic because in order to do this job you won't have to disassemble everything, you can do it on your car and you will need an allen 3mm wrench and a caliper from the tools. Just be gentle, this operation can take a while but it's a precise and a slow job but nothing hard indeed. I would recommend you to check your mixture with a duty cycle capable multimeter to make sure that your engine is running smooth and ideally.
#fixyourmercedes##mercedeskejetronic##mixturescrewadjustment#

Timecode
0:00 Intro
0:05 - 0:53 Thanking some dear people
0:54 - 1:09 Link in the description for those who want to donate the channel
1:10 - 1:24 About the video
1:25 - 1:49 The preconditions for the happy system
1:50 - 10:53 About the airflow meter and the CO-screw
10:54 - 11:09 Ending the video - comment, like, share, subscribe

What am I talking about?
My topic is the KE-Jetronic injection system which I try to demystify as much as I can.
For all of you to understand the system in brief - Developed in 1973 and being mounted into cars up to 1993 as it went in history. But why these to letters!?(KE) K(from German "kontinuierlich" meaning continuos, without interruption) the MECHANICAL injection system on which the fuel starts flowing from the fuel tank sucked by the FUEL PUMP and delivered to the FUEL DISTRIBUTOR which sends fuel to the INJECTORS while the majority of it flows through the FUEL PRESSURE REGULATOR through its return line back to the fuel tank again. The letter E(electronic) has to mark the electronic sensors (the developement starting from early eighties) which had to inform the ECU about the current state of the engine so that the ECU(Electronic Control Unit) then could create current signal in mAmp(miliampers) and send it to four crucial components for the system - the EHA(the electro-hydraulic actuator,a unit consisting of a magnet, an electromagnet and a baffle plate) which had to fine tune the engine in each of its phases, the ICV(the idle control valve), the unit which was predicted for the engines perfect idle, the X11(the diagnostic socket) where the duty cycle(the ideal mixture) was adjusted and the X11/4(the code reader) - the socket which from any codes were read if present using an OBD1 scanner.
An extraordinary injection system which could be fully repaired in your own garage using a multimeter and a pressure gauge only for its fine tuning, together with some common tools.
"Happy Mercedesing"