Testing eha valve. May 15, 2010 · The EHA valve on my '91 500SL is leaking.


  • Testing eha valve Apr 23, 2018 · 1. Mar 2, 2017 · The important thing to ensure is that there are no leaks in the rubber piping that goes to and from the air idle control valve, the crankcase and the air flow / mixture sensor (plate) assembly. It's the result of using a very Nov 20, 2019 · Testing fuel pressures to fix the lean running condition of my 560SEC ECE. There are several things that can go wrong with the EHA valve, and depending on what Mar 20, 2005 · This is from a February 2001 article by Steve Brotherton, an MB tech at Continental Imports from ImportCar online magazine. General Description: The test box kit is designed to test proportional valves and their electronics. 1ma current at the EHA at operating temp. Industrial Valve Test Box Kit EHA-TEQ-470-A-10 . In this 13-minute CIS training video, Kent will walk you through the steps recommended by Mercedes Benz to fully test the operation of the EHA valve on 1984 to 1993 4, 6, and 8-cylinder engines with KE-jetronic fuel injection. I will change that first and if there are still problems, I will check into testing the fuel pressure. 4 bar lower than the “System Pressure“ (SP). If fuel distributor upper chamber pressure is up to spec but lower chamber pressure isn't, you can adjust the EHA to correct that. . Several potential causes can increase/decrease this basic pressure difference. As a rough, you could use fuel pressure gauges and get the pressure difference referenced in the manual. Make sure the two O-rings that seal the EHA to the dist aren't lost. KE-Jetronic system pressure is usually around 5. e. Miscellaneous tests for getting the Air Mixture screw set enough to get the car running, but not "dialed in". Kent believes this is the best tester for the buck. KE-Jet Fuel Pressure testing 3. 2) pressure testing using a two port gauge. I’m running out of ideas! At cold engine start the EHA valve enriches the fuel. I replaced the o-rings (50 cents each at RMEuropean) with new ones but I continued to have a leaking EHA valve. Naturally, automotive-related tools will be used. It sets the difference in fuel pressure between upper and lower chambers. “The EHA is the final servo device for applying the corrections intended by the control syste Aug 27, 2020 · The indie shop I went to, doesn't know how to adjust the EHA valve itself, so they left it alone and tried adjusting the air/fuel ratio on the fuel distributor instead. Coolant Temperature Sensor (CTS): Tested and appears to be functioning correctly. As the field changes, (when the plate on the airflow sensor opens) the reed will move back and forth, changing the size of the valve opening. Sep 27, 2008 · You have to check the lambda reading (mixture) now, will change after replacing EHA. com/fix_your_m Feb 6, 2018 · Hi bsclifton: The EHA (Electro-Hydraulic-Actuator) is an electrical valve that controls the pressure on the CIS fuel distributor. instagram. 1. The EHA valve is only used on vehicles with the KE-JETRONIC fuel injection system. We weren't able to adjust it properly, so I ended up using the old EHA valve, until I find someone competent who knows how to adjust the EHA properly. I'm nervous to tighten the torx bolts too much to strip the threads on the fuel distributor. Reading the duty cycle from a digital meter (DMM) is straightforward. The duty cycle of the EHA valve is determined by the O2 sensor. K-Jet Fuel Pressure Testing 2. Despite all these efforts, the duty cycle remains high. 0ma -0. Nov 8, 2021 · Mercedes Ke-Jetronic - The EHA/about the adjusting screw#fixyourmercedes##mercdeskejetronic##ehaadjustingscrew#Instagram:https://www. Sep 28, 2004 · Once you undo the electrical connector and remove the two screws holding the EHA to the dist (watch for the fuel spritz) you can pull it off. Ignore that. I just replaced that, with the rubber boot and the idle control valve hoses. Plus - EHA valve adjustment (under the blanking plug, on rear of removed item) is easy to do. KB-valves and AxisPro valves . Aug 30, 2012 · The settings on the EHA valve have to be fine-tuned for each car and Distributor. Fuel System Output tests 4. The test box kit has an internal supply for 24V, which can supply one valve. Since portions of the test involve a running engine, you must exercise extreme caution when working near moving parts. The valve plate is fastened to the bottom of the loading piston through screws, and the cylinder is connected to the top of the integrated cylinder shaft. The control pressure varies according to the current going to the EHA (Electro-Hydraulic Actuator) which is the small black box screwed to the side of the Fuel Distributor. With the EHA disconnected, the car ran again, allowing me to get home safely. The only vacuum leak I had according to my mechanics smoke test was the gasket at the throttle body. The equipment is useful for hydraulic valves with integrated electronics, i. 0 bar. 5-6. May 24, 2018 · Testing for problems with the EHA valve requires specialized knowledge and equipment for working with Mercedes vehicles. To solve the problem, I had to perform a KE Jetronic EHA Adjustment. It's sounds like the mix is now lean, you need a MB test cable and a Fluke meter to perform this procedure. An EHA current measurement loom-insert will be made. This video is about Electric actuator adjustmentsEvery Tuesday and Saturday, we strive to provide you the best in the business. As explained above the air flow plate is just a mechanical balance that is connected to a plunger that allows more fuel into the fuel distributor. Oct 22, 2012 · I adjusted the EHA valve 1/4 of a turn clockwise and leaned out the mixture at the tower till I got +- 0. Disconnect EHA connector and install harness adapter for current testing, Harness adapter is available from Mercedes Benz. Jan 3, 2018 · Im an electrician by trade and know there is a way to check lamda control by the second smaller diagnostic port by front driver side. May 12, 2024 · As I have original pumps/check valves maybe need new pumps or may be the EHA but the EHA current 0+/- at idle and the current moves correctly with load or deceleration so ? IF you have a spare minute be great if you just test supply pressure at the CSV with Kon/Eoff and tell me what you get with ONE key motionI can compare to mine and maybe Dec 16, 2009 · The electrohydraulic actuator consist of a valve placed on a reed in between magnets. Always refer to the FSM for the true "dialed in" specs and not just what is written on the pdf! Oct 24, 2011 · A new fuel-test pressure kit is on the way from the States. Mar 7, 2009 · For the test procedure you will need (and know how to use) a decent multimeter with voltage, resistance, and amperage measuring functions. Jul 30, 2018 · I can have one probably in two or three days. Mar 22, 2010 · The amp test for the EHA valve is like this. Jan 3, 2012 · AFAIK there are two ways to test an EHA: 1) is it leaking? Any seeping of fuel at the little holes on the EHA is immediate cause for trashing it and getting a new one. Therefore, it is important to find a reputable and trustworthy Mercedes specialist who can properly assess and diagnose EHA valve problems. This high-quality meter can test all types of automotive electrical circuits, but Kent has discovered it is particularly well suited for testing Bosch KE jetronic fuel injection components on those CIS models from 1984 to 1993. In by far most cases of deviated Two corrections:At 8:32 into the video I said: cuts off the airflowCorrect: cuts off the fuel flow (because of lack of vacuum)At 18:21 into the videoI said: This is off our 1992 W124 300E, during the 80's and 90's many european cars had one of these expensive parts, when they fail they start leaking fuel and can Nov 22, 2024 · To get the car home, I had to disconnect the EHA valve. This in turn controls the amount of fuel in the lower chambers of the fuel mercedessource Product - Free on-demand video included on testing the EHA valve and related circuits. May 15, 2010 · The EHA valve on my '91 500SL is leaking. To check that the EHA works efficiently, please connect the cable connection to the multi meter correct 🚗 To-Do List #1: EHA-Valve Investigations [1991 Mercedes 300TE 24V] 🚗Welcome back to the channel! In this first episode of my “To-Do List” series, I dive i Sep 24, 2022 · The testing device is processed and manufactured according to the size of the cylinder block/valve plate interface in EHA piston pump. Is this a way to test EHA? Nov 28, 2020 · Now if you use a digital type multimeter to measure the voltage output from the computer with the EHA disconnected you may read as much as 4 volts. There is an electromagnet placed inside that either decreases or increases the magnetic field. EHA Valve electrical tests 5. With everything in order and zero EHA current (EHA electrically disconnected), LCP is about 0. Moving toward our YouTube cha Mar 17, 2018 · W124 300E EHA valve problems Jump to Latest 11K views 26 replies 7 participants last post by Jayare Mar 20, 2018 Jun 19, 2021 · Depending on the EHA‘s opening degree the “Lower Chamber Pressure“ (LCP) varies. Will be doing valve stems in december if all goes well. The face of the EHA that's against the fuel dist, has a couple of holes in between the attachment screws' holes. idml dtho suqdte bkft lult vmhaht ggix macc rgqxh fmymniufn