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Your car stumbles and you don't know what to do! The channel fix your Mercedes confutes the statement of a certain channel that if your car starts stumbling you should check your EHA. In this video I want to explain that the KE-Jetronic is a mechanical injection system with electronic upgrade and as such its mechanical part of the system must be in an excellent shape for it to work properly. As the fuel pump and the fuel pressure regulator are 2 key components of the system then they should be working properly. The moment it's achieved a HUGE part of the job on the system is done. As the EHA does just what the ECU orders then the problem for an stumbling engine can not be solved on that part. KE-Jetronic can fully be operational without the ECU and thus without the EHA operating. The problem can be solved but with a pressure gauge hooked up at the fuel distributor in order for you to see if you have the ideal differential pressure(0.4bar). If the fuel pressure regulator failed there is no way that the EHA can solve this problem. If not then you can get this ideal pressure difference by decreasing the secondary pressure but this isn't then the permanent solution. This way you are just going to make the car sluggish. There is a big possibility that soon the same problem is about to happen again. Do it by replacing your fuel pump and the fuel pressure regulator in order to have a healthy running engine. The KE-Jetronic system works the way that the secondary pressure mustn't drop for more than 0.1bar no matter if the car accelerates or if it idles. The stumbling is going to appear just because the fuel pressure regulator doesn't hold the pressure firm but it drops for 1bar or more so there is no way that the EHA can make this compensation in order for the proper pressure difference to be achieved.
How it's done - watch the video for Ivica FyM will give you the actual solution for the stumbling car issue.
Happy Mercedesing
#fixyourmercedes##mercedeskejetronic##stumblingbecauseoftheeha#
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"