Testing eha valve. See here for why adjustment of the EHA would be a bad idea.

Testing eha valve May 9, 2024 · Fuel Pressure Test After I had created post #1 here, I proceeded to do a fuel pressure test. 4 bar differential, seems fine Deceleration shut-off test 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. Reading the duty cycle from a digital meter (DMM) is straightforward. May 27, 2010 · Engine Problems Due to Distributor Cap and Rotor, Bad Ignition Wires, or Valve Cover Gasket Leaks; Wear in Climate Control Unit Buttons May Cause Climate Control System Failure; Repair Leaks From Head Gasket/Timing Cover Gasket Before Oil and Coolant Intermix; Failure of EHA valve may cause fuel/engine problems Apr 23, 2018 · 1. I tested the oxygen sensor and it generates 800 MV, so it passes the test. Disconnect EHA connector and install harness adapter for current testing, Harness adapter is available from Mercedes Benz. The equipment is useful for hydraulic valves with integrated electronics, i. Nov 22, 2024 · To get the car home, I had to disconnect the EHA valve. With nondestructive testing, these valves can conform to ASME Intermediate Special Ratings, which allow even higher pressure/temperature applications. To check that the EHA works efficiently, please connect the cable connection to the multi meter correct Nov 20, 2019 · Testing fuel pressures to fix the lean running condition of my 560SEC ECE. Mar 22, 2010 · The amp test for the EHA valve is like this. 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: Optimize your fuel delivery with the Bosch Fuel Injection Electro Hydraulic Actuator/EHA Valve F026T03002. The test box kit has an internal supply for 24V, which can supply one valve. 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. With the EHA disconnected, the car ran again, allowing me to get home safely. With everything in order and zero EHA current (EHA electrically disconnected), LCP is about 0. 1. On my test bench, these are the typical lower chamber pressures I get when applying current to the EHA. I just replaced that, with the rubber boot and the idle control valve hoses. KB-valves and AxisPro valves . Coolant Temperature Sensor (CTS): Tested and appears to be functioning correctly. 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 HP valves have readily available trims capable of attaining full pressure drops. Jan 12, 2019 · During all this testing the EHA valve started to leak in the body. I know some people have adjusted it due to modifications on the engine, but 99. To solve the problem, I had to perform a KE Jetronic EHA Adjustment. It's the result of using a very Aug 30, 2012 · The settings on the EHA valve have to be fine-tuned for each car and Distributor. 8bar. 4 bar lower than the “System Pressure“ (SP). 4. Mar 20, 2005 · This is from a February 2001 article by Steve Brotherton, an MB tech at Continental Imports from ImportCar online magazine. An EHA current measurement loom-insert will be made. It sets the difference in fuel pressure between upper and lower chambers. It's sounds like the mix is now lean, you need a MB test cable and a Fluke meter to perform this procedure. You need to make a wire connector to go from one terminal on the wiring plug to it’s connector on 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. Despite all these efforts, the duty cycle remains high. I will change that first and if there are still problems, I will check into testing the fuel pressure. The face of the EHA that's against the fuel dist, has a couple of holes in between the attachment screws' holes. Jan 2, 2018 · I'm not an expert, but in my experience with a bad EHA valve they usually leak gas at a seep hole on the the valve itself, I've read on adjusting them and tried it on my 300SE with no success, $600 for the new one seems high if thats just the part, I bought a new one and it did clear things up, I got mine from here. 6bar. Jun 19, 2021 · Depending on the EHA‘s opening degree the “Lower Chamber Pressure“ (LCP) varies. 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. I’m running out of ideas! Oct 29, 2021 · EHA (Electro-Hydrualic Actuator): Please see page 3 of this thread for EHA testing. The EHA valve is only used on vehicles with the KE-JETRONIC fuel injection system. K-Jet Fuel Pressure Testing 2. This video is about Electric actuator adjustmentsEvery Tuesday and Saturday, we strive to provide you the best in the business. 9% of the time, you are masking the issue by adjusting it. Therefore, it is important to find a reputable and trustworthy Mercedes specialist who can properly assess and diagnose EHA valve problems. In by far most cases of deviated Jul 30, 2018 · I can have one probably in two or three days. EHA Valve electrical tests 5. . 2 bar; Lower Chamber Pressure: 5. EH/HP and EHA/HPA valves with buttwelding end connections have Intermediate Standard Ratings. This fuel distributor pressure regulator fits a wide range of Mercedes models, including 560SL, 190E, 300E, 560SEL, 420SEL, and more. 40mA – 4. Make sure the two O-rings that seal the EHA to the dist aren't lost. Mar 17, 2018 · W124 300E EHA valve problems Jump to Latest 11K views 26 replies 7 participants last post by Jayare Mar 20, 2018 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. 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. The duty cycle of the EHA valve is determined by the O2 sensor. See here for why adjustment of the EHA would be a bad idea. “The EHA is the final servo device for applying the corrections intended by the control syste May 24, 2018 · Testing for problems with the EHA valve requires specialized knowledge and equipment for working with Mercedes vehicles. Did not make a change in any of the other operations. The only vacuum leak I had according to my mechanics smoke test was the gasket at the throttle body. Oct 24, 2011 · A new fuel-test pressure kit is on the way from the States. I replaced the valve and O rings (all cleaned first!). 0bar. Fuel System Output tests 4. If you have a leak Jul 25, 2015 · Check the EHA valve 2-pin electrical connector, next from FD below air cleaner. 20mA – 5. Miscellaneous tests for getting the Air Mixture screw set enough to get the car running, but not "dialed in". For the love of god, do not adjust the EHA. Moving toward our YouTube cha Feb 6, 2018 · Hi bsclifton: The EHA (Electro-Hydraulic-Actuator) is an electrical valve that controls the pressure on the CIS fuel distributor. 5bar. I’m puzzled as to what could be wrong. General Description: The test box kit is designed to test proportional valves and their electronics. Nov 2, 2024 · Today I tested for a gasket leak using the testing method with testing fluid on the coolant expansion tank and it didn’t test positive for a bad gasket (no color change in testing fluid). I have not yet measured continuity between the switches in the engine and the CIS. Always refer to the FSM for the true "dialed in" specs and not just what is written on the pdf! 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. Check the EHA valve operation and influence. EHA is operatinal when the engine/Lambda sensor have been warmed up. It doesn’t seam to be using up coolant by the looks of how much is in the tank. 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. There should be significant idle speed change when the connector is opened. At cold engine start the EHA valve enriches the fuel. Plus - EHA valve adjustment (under the blanking plug, on rear of removed item) is easy to do. 60mA – 4. Several potential causes can increase/decrease this basic pressure difference. Testing current at the EHA. System pressure of 5. There are several things that can go wrong with the EHA valve, and depending on what Sep 27, 2008 · You have to check the lambda reading (mixture) now, will change after replacing EHA. : System Pressure: 6. KE-Jet Fuel Pressure testing 3. e. Ignore that. Jul 13, 2024 · 🚗 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 Industrial Valve Test Box Kit EHA-TEQ-470-A-10 . With the EHA valve disconnected as suggested, the results are as follows: At operating temp. Remove the connector on the EHA. 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. As a rough, you could use fuel pressure gauges and get the pressure difference referenced in the manual. 8 bar; 0. fwrzibit bumo mbhyhcv dvyaao ftl vgcq xnybprg xhbrfii xhxfat osefrg