Testing eha valve The mechanic (reputable) quoted me $400 for a new one. Make sure the two O-rings that seal the EHA to the dist aren't lost. Any thoughts? HP valves have readily available trims capable of attaining full pressure drops. k. Learn about this problem, why it occurs, and how to fix it. The valve plate is fastened to the bottom of the loading piston through screws, and the cylinder is To get the car home, I had to disconnect the EHA valve. How do I check the IAV supply voltage and current? Cold starting vehicle seems to flood. I then checked bowden cable and screwed it in clockwise, lubricated the throttle linkage joints, and not sure which of the two was the winner but the difference is amazing! The car wasn't kicking down on throttling it turns out, but now, it kicks 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: Cold starting vehicle seems to flood. It's just the light now. Currentless it is open to a factory calibrated degree. -apparently leak at EHA valve or fuel divider-no car until fixed 🥲 See less See more 4 Save Share Reply Quote Like. Find many great new & used options and get the best deals for MercedesBenz Fuel Injection Regulator EHA DPR Valve 2437020007 at the best online prices at eBay! Free shipping for many products! Testing as done in the article verifies control! The EHA valve itself reacts to varying current flow by causing the programmed leak within to grow and fall. The EHA acts as a controlled leak depending on current. 5k miles as of 7/25/19 Mercedes W124 190E 300E OEM Bosch Fuel Injection EHA Valve F026T03002 0000703962 (#201819362472) 3***t (1194) - Feedback left by buyer. I have fuel all the way to the distributor but none out of the injectors? New fuel pump, pressure regulator and filter. If you read a negative number you need to reverse your meter leads. 91 1991 Mercedes 500SL EHA Valve - Fuel Injection - APA/URO Parts, Bosch - PartsGeek In this video, I test and then change my faulty EGR valve on my 1992 R129 Mercedes-Benz 300SL. I would replace those to see if it fixes the leak before replacing the EHA valve. The connection is shown in lyckymikes PDF on post 11. I did test my EHA current with an analog ammeter. in this thread in this sub-forum in the entire site. In our previous work , an EHA-driven ankle–foot prosthesis design was proposed where the SEA was pre-defined as the actuation concept of the prosthesis and the spring parameters were designed by the limitation of the force bandwidth. Joined May 28, 2019 Messages 16 Reaction score 6 Your Mercedes When the EHA valve begins to malfunction, it can cause a significant change in your Mercedes’ performance, often leading to engine problems. Any advice appreciated. D. Reactions: 4Matic 300TE. The next easiest thing is a smoke test, to look for vacuum leaks. H. Nice video here showing issues and how to test . 5 times above the maximum operating pressure for shell testing, and 1. If fuel distributor upper chamber pressure is up to spec but lower chamber pressure isn't, you can adjust the EHA to correct that. 496 posts · Joined 2012 Add to quote; Only show this user Increased Pressure/Temperature Ratings – Steel EH and EHA valves with buttwelding end connections have Intermediate Standard Ratings. The face of the EHA that's against the fuel dist, has a couple of holes in between the attachment screws' holes. 1 Ohm which is OK Manual states 20 Ohm210mV Voltage as shown here once running is OK per Megawatt Man from MBworldI The test calls for two readings. Jump to Latest I did a smoke test and found smoke coming out of the gasket below the throttle. 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. Conduction Test acc. I replaced the o-rings (50 cents each at RMEuropean) with new ones but I continued to have a leaking EHA valve. Failure of this part by a fuel leak or stock valve can cause a no start, slow start, rough idle, high idle, stalling or slow EHA valve - to fix fuel leak; Intake air temp sensor, idle control micro switch, ICV, OVP and Bosch Airflow Potentiometer - in the attempt to fix high idle issue. Before you can put an engine back together you first need to make sure the old parts function proper The EHA is the final servo device for applying the corrections intended by the control system. Fuel Pressure Kon Eoff and full test results for fuel pressure, lambda and EHA testing of 560SL. See tables 7 and 8 for specific ratings. Save Share Reply Quote Like. EHA valves are angle versions of EH valves EHA valve replacement - 560SEL User Name: Remember Me? Password: Register: ShopForum Gallery: FAQ: Calendar: Today's Posts: Search LinkBack: Thread Tools: Display Modes #1 01-23-2003, 10:30 AM Thomaspin Increased Pressure/Temperature Ratings – Steel EH and EHA valves with buttwelding end connections have Intermediate Standard Ratings. The test for the wire iteslf was below 1 ohm. 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 ? The electrohydraulic actuator consist of a valve placed on a reed in between magnets. to diagnose this issue , connect a pressure gauge at the end of cold start valve [ assume you dont have the right one ] crank car , pressure is around 75 psi , with engine off it drop to around 40 , and stay there for some time . the first one is from the test port and the valve closed. 2. Test TPS sensor Lastly, having a wide band O2 sensor hooked up when setting this up is worth it's weight in gold. Jump to Latest 11K views 26 replies 7 participants last post by Jayare Mar 20, 2018. 0 -001 -12 -H Valve style Seal material: H HNBR Voltage: 12 V or 24 V-24-1 Additional analog inputs: Number of inputs Cavity code: NG Valve. If either pressure or engine speed reading is not correct, test throttle valve microswitch, test control current to differential pressure regulator, test ECU and test TD ignition signal. KE-Jet Fuel Pressure testing 3. 25mA Acceleration = Current goes to -0. A quick search has shown used on ebay for $30-$60 but won't risk that. Disconnect EHA connector and install harness adapter for current testing, Harness adapter is available from Mercedes Benz. To solve the problem, I had to perform a KE Jetronic EHA Adjustment. 010. 0 with PPCD 04] Proportional valves Directional valves Smart products Special designs Product classification Name Max volume 1ow 2 bar dp EHA Conduction Test acc. Proposition 65: Cancer and Reproductive Harm: About Danfoss; Release notes; Contact us; Privacy policy; Terms of use; General information; Cookies Buy a 1991 Mercedes 500SL EHA Valve at discount prices. Download scientific diagram | Safety valve testing procedure. Questions: 1. The spec Heart valve regurgitation is very common in globally. I can help you with the duty cycle test if you'd like but the EHA current test is more accurate. ASIN : B00HO72C1W : Customer Reviews: 4. 1K views 7 replies 4 participants last post by ianrandom Dec 4, 2016. 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. The EHA is not exactly plug and play. Factoring in the elimination of hydraulic plumbing, auxiliary pumps, servo valves, and the ongoing maintenance of filters and valves the EHA has a tremendous amount of appeal. If you notice a drop of pressure after the car has been sitting for a few minutes, you could have a bad check valve allowing fuel to flow backwards. A healthy heart valve fully closes to keep blood flowing in the proper The EHA valve does nothing with a cold engine so all testing needs to be done with a fully warmed up engine. An EHA current measurement loom-insert will be made. instagram. Fuel delivery should start again at 900 RPM. With the valve opened (A+B going to the gauge), you'll get system pressure (the higher of the two readings). I will be replacing the two O-rings first, but per the photo below - the gas seems to be "pooling" on the top of the distributors surface - slightly above the EHA. EHA Valve electrical tests 5. This video is also helpful for those with an R107, W124 and ot EHA that is ideal for many industrial applications. from publication: Design and development of a high-precision automatic safety valve testing system | Safety valves are widely used as The paper presents comparison between EHA, EMC and common hydraulic systems, followed by development of our own testing EHA system, where besides improved energy efficiency and solving presence of moisture, system will use small amount of high-tech hydraulic liquid. Christianhaug Discussion starter. With the EHA valve disconnected as suggested, the results are as follows: Leaking EHA valve. General Description: The test box kit is designed to test proportional valves and their electronics. Since portions of the test involve a running engine, you must exercise extreme caution when working near moving parts. With the Progress Test on the EHA Campus, you can measure your knowledge in all areas of the European Hematology Curriculum and keep track of how you progress over the years. 2 per unit. Free on-demand video included on testing the EHA valve and related circuits. I completed the test with the following results. Moving toward our YouTube cha This EHA Valve has a DC Resistance of 19. if you have a pressure leak , it goes to zero in a short time . Otherwise start elsewhere. EHA Valve Mercedes 300E EHA Valve - 300E E. HP valves have readily available trims capable of attaining full pressure drops. One sells for $192 The TPS (Throttle Valve Switch) was checked and it is good. [EHA 2. 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 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. Choose top quality brands APA/URO Parts, Bosch. Reactions: 281lxm. Industrial Applications: Environmental Protection: wastewater sludge handling silos, pump station hatch automation, valve automation; Robotics: motion control requirements and applications; Test Machines: force testing, high frequency force tests The EHA valve is probably kaput. : Because it is used mostly for low-pressure applications, the system is usually pressurized to 10% above the maximum operating value or 100 psi max. I checked parts and ohter sites and found that there are two o rings connecting this to the fuel distributor. In This paper presents a new and eﬀect test method for the oil ﬁlm stiﬀness of the cylinder block/valve plate interface in EHA piston pump. Fuel System Output tests 4. I have found the two little green gaskets ( O rings) between the EHA valve and the fuel distributor are more often the source of the leak. The test box kit has an internal supply for 24V, which can supply one valve. This Video: 560SL - Bench Testing The Idle Control Valve. I have two questions: control and rest) along with a fuel pump volume test. I understand if the 02 sensor is working correctly the car would most likely die upon disconnecting the EHA valve Key on engine off test should read 75 mA. It is also possible to drive the EHA in “open-loop” control, meaning movement stops when a limit switch is reached, or a maximum pressure is reached. 40mA – 4. 1. I guess I was expecting any leaked gas to pool below the black box Progress Test. EH/HP and EHA/HPA valves with buttwelding end connections have Intermediate Standard Ratings. Thanks for your reply. The equipment is useful for hydraulic valves with integrated electronics, i. If you have gasoline coming out of its weep holes, replace it. All SDMC EHA’s allow for optimal control of speed, position, and force. the m103 service manual defines a very simple test for the EHA, and if measuremements are EHA-PAM-291-A-20 General Description The EHA-PAM-291-A-20 power ampli˚er is designed for controlling Vickers by Danfoss SM4 servo-valves, or other servo-valves up to 200 mA max. An externally switched, 24V “drive The black lead is the positive lead. The amp test for the EHA valve is like this. Testing current at the EHA. com/fix_your_m I discovered that my EHA valve is leaking (somewhat choppy, idle, hard hot start, and fuel smell). 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 EHA-RMP-201-A-2* Ramp generator See catalog 2410B EHA-PID-201-A-2* PID controller See catalog 2427 EHA-PSU-201-A-10 Power supply See catalog 2410B pump and test valve, as in table. All of the resistance test with the eha connected and to the eha itself was 19. petrol may come as a surprise to many, I believe that once the relation between the gasoline settings and the gas (air) are determined, filtered compressed air can be used to set the calibration (at specific HP valves have readily available trims capable of attaining full pressure drops. Put on new valve and wow, runs like a brand new car. 4 bar with the valve open. S. to ISO 7637-2:2011 Tests 1, 2a, 2b, 3a, 3b, 3, 5 Test level: IV except for 24 V EH and EHA Valves D100042X012 Product Bulletin 51. C. My car is a California model too. 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. Low gas mileage. NO SMOKE of any type! I think the mix was bad after installing the EHA valve and it was causing the burn to cheers redliner it all helps get a step nearer and most of all helps me learn how to test with meter just off to test EHA valve , just a bit baffled that when i tested the idle speed contact it was switching ,yet the diagnostics guys machine said it Hydrostatic Testing: Pneumatic Testing: Typically, the system is pressurized to at least 1. Although the use of air vs. I just got a new EHA valve for x-mas from my father and its like I have a new car!! 1992 190E 2. System pressure of 5. Jump to Latest 21 - 40 of 44 Posts. The EasyPac Residential Assemblies include pressure gauges, Potter flow switches, 3-way valve, and 1” drain Find many great new & used options and get the best deals for MERCEDES Bosch #0000703962 OEM EHA Fuel Inject Valve 86 to 93 Listed Ship at the best online prices at eBay! Free shipping for many products! However, while cleaning things up I noticed some gas on top of the fuel distributor, just behind the EHA. K-Jet Fuel Pressure Testing 2. 6 out of 5 stars : Best Sellers Rank #865,797 in Automotive (See Top 100 in Automotive) #789 in Automotive Replacement Fuel Injection Pressure Regulators: This study attempts to combine EHA and PEA, and provide full play to both advantages via their combination. This is the most accurate way to adjust the mixture on that model. 92 1992 Mercedes 500SL EHA Valve - Fuel Injection - APA/URO Parts, Bosch - PartsGeek HP valves have readily available trims capable of attaining full pressure drops. If you test EHA current as suggested in post 13 you should see: Post start just after car starts when >20C ambient a current of 5-9mA (assuming your 1/4 turn CW has baselined EHA current to 0+/- in idle @ > 70C HP valves have readily available trims capable of attaining full pressure drops. 89benz300se · Registered. Key-on = 10mA Engine on = 0. Naturally, automotive-related tools will be used. 0 bar with the valve closed and 6. OP . To actually test this one must view system and lower chamber pressure. Road test shows the car running super well now - running very smooth at idle. they actually start leaking right through the body material, I guess it becomes porous with age. Fuel & Intake auto parts for Mercedes-Benz R129 500SL (1990-1993) 5. Optionally, various functions (e. EHA (Electro-Hydrualic Actuator): Please see page 3 of this thread for EHA testing. I checked the EHA valve and OVP relay and found corrosion (like on battery) and repaired. 20mA – 5. So I put my multimeter in between one of the connectors of the EHA (tried both) to the according plug connection and the other wire from eha to plug connection directly. The EHA valve is only used on vehicles with the KE-JETRONIC fuel injection system. Coolant Temperature Sensor (CTS): This morning did additional tests, duty cycle went to 8-9% with eha connected, will test air flow position sensor . Warm engine Mercedes-Benz 300SL Failure of EHA valve may cause fuel/engine problems - 16 reports. Sort by Oldest first Oldest first Newest first Most reactions. Miscellaneous tests for getting the Air Mixture screw set enough to get the car running, but not "dialed in". Save Share Mercedes Ke-Jetronic - The EHA/about the adjusting screw#fixyourmercedes##mercdeskejetronic##ehaadjustingscrew#Instagram:https://www. so usually , the its funny you mention the eha,ive been having the same issues with mine,i replaced the old one with a used one off ebay,had the air fuel ration recalibrated,i found the engine runs like crap boggs ,loss of power,pops in plenum,needs to warm up to operating temp. 29 Ma with koeo. What is more important than the actual values is the 0. The HPA valve should always replace the EHA valve unless the existing EHA valve utilized an intermediate rating or has higher capacity. With increasing current flow in positive direction it is increasingly closed and with increasing current flow in negative direction it is increasingly opened. Fuel Pressure Test After I had created post #1 here, I proceeded to do a fuel pressure test. Drop it in and test it. The voltage on the EHA valve is 3. In 2024, 78% of exam candidates who took Find CRP , 0129979748 Fuel Injection Electro Hydraulic Actuator/EHA Valve O-Ring; O-Ring at EHA Valve 2430210041 at discount prices in our extensive Audi, Mercedes, VW auto parts catalog. Real1shepherd. Started smelling gas couple of months ago. The shell test validates the strength and soundness of the valve pressure-containing structure. Hello all, My name is Christian and I am a young mechanic working for a repair shop. Reason is I see two different ones on Parts Geek site, both are Bosch. 21 posts · Joined 2018 Add to quote; Only show this user #1 · Mar 18, 2018. So need to replace. The minimum shell test pressure that can use are listed in table 2 of API-598. 60mA – 4. 14 amps . Driven car with cold start valve disconnected but no difference. then when i disconnect the eha,the car runs strong has lots of power,does not Increased Pressure/Temperature Ratings – Steel EH and EHA valves with buttwelding end connections have Intermediate Standard Ratings. 6bar. The paper ﬁrst establishes the oil ﬁlm theory of the cylinder block/valve plate interface. D12typ Member. I assume that's residue fuel. Kent believes this is the best tester for the buck. Let me know if you have any questions. The Progress Test is primarily designed for trainees and early-career hematologists, but many experienced hematologists also participate. 6L. The mains lead connects the test box with the outlet. 7,5 (0. In the U. A. For low-flow applications, smaller valve sizes are available with specialized valve plug designs. EHA's go bad all the time for no apparent reason. 0L: EHA Valves and other parts related to Fuel Injection This EHA valve controls the fuel inside the fuel distributor to each fuel injector based on demand from the fuel injection control unit. 6 out of 5 stars 26 ratings. I removed the connector to the EHA and found brown stuff on one pin and in 1 connector. of the 4 cylinder 190Es suggested that they were slow accelerating cars by any standard and the handful of others I'd test-driven had been real slugs, so I didn't really know any better. Wife's '87 W124 230E has had the EHA valve diagnosed as leaking. No gas leak. Full Load Enrichment 1. Valve-less EHA systems can be classified depending on the following Buy a 1990 Mercedes 500SL EHA Valve at discount prices. g. It's the result of using a very Leaking EHA valve. The second is with the valve open to the cold start fitting. Reading the duty cycle from a digital meter (DMM) is straightforward. Wondering if there is a difference on the 560SL ones. Valve - Bosch 3. 11982 posts · Joined 2009 Add to quote; Only show this user a compensating tank, a filter and valves are integrated in the hydraulic block. I'm not aware of a way to test the EHA valve by itself, but that's not to say there is not some way of doing it. Is there a bench method one can do to test and make sure the EHA 1. Cold start + EHA valve UNplugged = No start? May I ask why I may not unplug the eha? I did test the fuel pressure regulator and it is working. I know some Check the EHA valve 2-pin electrical connector, next from FD below air cleaner. Ignore that. Connect meter adapter cable between differential pressure regulator and multimeter. To fix sluggishness, I adjusted the EHA valve's pressure screw about half a turn (to no effect). However, you should certainly be able to see it's effectiveness in action, provided your O2 sensor is functioning properly (ie. All forms of enrichment are accomplished by increasing the differential pressure within the fuel distributor. It's a 91 500sl. D Likely the body of the EHA is leaking in your case which means you have to spring for a new unit. Cold start + EHA valve plugged in = Engine starts? 2. Increased Pressure/Temperature Ratings – Steel EH and EHA valves with buttwelding end connections have Intermediate Standard Ratings. Seems to work fine except the leak. 0 -001 -12 -H Valve style Seal material: H HNBR Voltage: 12 V or 24 V-24-1 Additional analog inputs: Number of inputs Cavity code: NG Valve EHA valve will no longer be available as a new assembly; however, spare parts will be supported until July 2022. With the EHA disconnected, the car ran again, allowing me to get home safely. The range from the main EH and EHA Valves Product Bulletin 51. 1 Ohm which is OK Manual states 20 Ohmcurrent of 15mA as shown here once running is OK per Megawatt Man from MBworld Most likely its the EHA valve itself, but yes, it could just be the o-rings. More current more fuel passing. Sure enough it is my EHA valve. Mercedes-Benz 300SL Failure of EHA valve may cause fuel/engine problems - 16 reports. Pulled cold start valve with engine running and not leaking. The ideal readings are 6. 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. 25mA, blips to 50mA and goes back to 0. 5 x 1 through 6-Inch), Design With nondestructive testing, these valves can conform to ASME Intermediate Special Ratings, which allow even higher pressure/temperature applications. About testing posts 11 and 24 would cover the testing of that said orifice. 040 So, my laundry list: 1) clean idle control valve (icv--maybe bad) 2) clean o2 sensor (mpg is ok, o2 probably good) 3) adjust EHA (or fix vacuum leak) Do the testing that is all around the site, and don't screw with items that are not meant to be screwed. My car is fixed! I kept on adjusting the top 3mm mix screw while running counter clockwise untill the engine shut off then in small increments adjusted clockwise until idle smoothed out. CRP 2430210041 Fuel Injection Electro Hydraulic Actuator/EHA Valve O-Ring ‎EHA Valve : Item Package Quantity ‎1 : Additional Information. 1989 300se / 2016 C450 AMG Joined Jul 13, 2017 The true test will be when I park the car outside overnight and trying to start it in the morning. Never ran that well. See table 7 for specific ratings. mercedessource Product - Free on-demand video included on testing the EHA valve and related circuits. IS there anyway to test an EHA valve on my 1988 SEL, its very hard to start. 2. Advanced Search Is this ( 02 589 04 63 00) the cable to test current flow to the EHA valve; if so I EHA-TEQ-460-A-10 (02-326127) Portable test box for KB proportional valves Keep your plant running with Eaton Factory Service. not lazy). Noticed dried gas by the eha valve. However, I could see some 'dampness' in between the 2 pins of the EHA. Read a few threads and most complained about EHA valve leaking fuel. 9-4. On my test bench, these are the typical lower chamber pressures I get when applying current to the EHA. Response = With the valve closed (A only going to the gauge), you'll get control pressure (the lower of the two readings). Maybe some carb cleaner too. 10 times for seat testing. One could try cleaning it by removing the EHA and blowing air trough the EHA return line connection at the distributor. Check valve on fuel pump: Fairly easy to replace. 2) pressure testing using a two port gauge. To discuss about discussion his advices are free. Marty EH and EHA Valves D100042X012 Product Bulletin 51. Original Eaton parts will give serviced valves “like EHA Valve Replacement. 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 Is leaving the EHA valve unpluged causing any sort of damage to the fuel distributor or engine? I ask because i have cahnged every part in my 500 sec and the only way to get the car to acclerate correctly while driving has been to do that. Plus - EHA valve adjustment (under the blanking plug, on This video is about Electric actuator adjustmentsEvery Tuesday and Saturday, we strive to provide you the best in the business. Fuel pressures also seem o. Have you checked fuel pressures? For 107 Manuals and wire diagrams courtesy of tonk560. 437. 3 8v (converted to 5-speed) 27,045 miles as of 9/31/08 206,000 miles as of 8/3/19 1965 Shelby Cobra 427S/C (351W engine) 15. The testing device is processed and manufactured according to the size of the cylinder block/valve plate interface in EHA piston pump. Sent from my iPad using Tapatalk . As discussed in the previous sections, the HPA valve offers several advantages over the EHA-RMP-201-A-2* Ramp generator See catalog 2410B EHA-PID-201-A-2* PID controller See catalog 2427 EHA-PSU-201-A-10 Power supply See catalog 2410B test valve and throttle Test Circuit. you can smell it when you open hood . Flow rate set at pump, as in table. 3 ohms, within the spec. Keep it classy, keep it OEM. Powertrain Control System Diagnosis & Testing ($55 - $69) I have no current when connecting my harness to the EHA valve - 0 mAssupposed to have 75 mAs, I believe. I have a 1987 190E 2. Accurate description, good communication, well packed, fast delivery. SEC 560. 5 ohms(brand new EHA valve) I'm beginning to think I have an ECU problem(brand new KAE OVP installed in January) when it leak , it get wet . 5bar. Its only been one day but the car runs like a dream now however let me know if i am causing any damage. The duty cycle of the EHA valve is determined by the O2 sensor. Always refer to the FSM for the true "dialed in" specs and not just what is written on the pdf! 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 At cold engine start the EHA valve enriches the fuel. 6 4. How do I clear the code - disconnect the battery for a few minutes? Other way. Experienced factory technicians inspect and test your valve and repair as needed and give you a factory test stand report. I swapped cis-e units, reconnected the amp test for the eha and still got . Have a 1988 model and noticed the EHA valve is dripping. But, an easy "test" is start the engine and look at the EHA. I'm nervous to tighten the torx bolts too much to strip the threads Hi bsclifton: The EHA (Electro-Hydraulic-Actuator) is an electrical valve that controls the pressure on the CIS fuel distributor. Reactions: Blobcat. This EHA Valve has a DC Resistance of 19. 90 1990 Mercedes 500SL EHA Valve - Fuel Injection - APA/URO Parts, Bosch - PartsGeek Note: I said 6 PSI - I had a senior moment It’s 6 BAR off course!Pressure is good now with new EHA valve 6 Bar System and 6. 4 bar difference. Factory Mercedes Benz 102 589 04 63 00 Test Cable see pictures for condition. EHAs are now at a price point where they are a competitive alternative to traditional hydraulic solutions. The vehicle worked great for about 10 days but is acting up again without corrosion. â€œThe EHA is the final servo device for applying the corrections intended by the control system. EHH-AMP-712-D/G-30 Power Plugs for Proportional Valves, 12VDC Amplifier (Din-plug mounting) Model Code Description EHD-DSG-201-A-10 Demand signal generator EHA-PID-201-A-20 Electronic PID controller Functional module (Din-rail mounting) Model Code Description EHA-TEQ-470-A 10 Portabe test box for KB and Axispro Valves Others 5 Notes: HP valves have readily available trims capable of attaining full pressure drops. All I did since the last (high idle) test run was to wiggle the connector on the EHA and I pulled the glove box to give a stern look and a The EHA valve controls fuel enrichment/adjustment pretty much everywhere. The tool also could manually do testing by activating the vent valve and purge Electro-hydrostatic actuator (EHA) is a widely used power by wire integrated actuation in aircraft. With nondestructive testing, these valves can conform to ASME Intermediate Special Ratings, which allow even higher pressure/temperature applications. EHA valves are angle versions of EH valves EHD/EHAD: Uses a balanced valve plug(1) with graphite valve plug piston rings; also, see tables 4 and 5 EHS/EHAS: Uses an unbalanced valve plug. safety technology) may be added in the form of valves or electronics. More than a year ago. 2:EH September 2006 3 Design EH (globe) Design EHS (1. Industrial Valve Test Box Kit EHA-TEQ-470-A-10 . New o-rings did not help so I just went and got a new EHA valve. e. Gain, o˜set and dither (frequency and amplitude) are adjustable by potentiometers mounted in the front panel. So I just replaced that gasket, the rubber boot that goes from the CIS system to the throttle and the two W124 300E EHA valve problems. The test stand that I have (partly) envisioned already, would use air to flow thru the EHA to be adjusted. This in turn controls the amount of fuel in the Optimize your fuel delivery with the Bosch Fuel Injection Electro Hydraulic Actuator/EHA Valve F026T03002. Was assuming I could simply replace and the engine would run fine, without any adjustments. to ISO 7637-2:2011 Tests 1, 2a, 2b, 3a, 3b, 3, 5 Test level: IV except for 24 V systems + test No. Checked resistance of EHA valve and it is spot on at 19. Upon investigation, I found the leak coming from the EHA valve/sensor. Required for all valve types. 2019 White Audi Q5 - 35k 2016 BMW 535i - 38k 2003 Silver ML350 - 168k. I did all of the resistance test and the test for continuity. Otherwise you're basically guessing as to what's right @ cruise/WOT etc. Started and yes, small drip coming out of the weep hole. Also checked the Air Flow Sensor Position Indicator and it tested good. Then, simulate the ﬂow ﬁeld of the interface, which obtains the pressure distribution Buy a 1992 Mercedes 500SL EHA Valve at discount prices. guiding, and push- down- to- close valve plug action. The test box kit is designed to test proportional valves and their electronics. To be truelly honest I'm HP valves have readily available trims capable of attaining full pressure drops. 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. I have a big leak at I could actually give it a bit more to make it a bit more responsive. EHA ATA Page 1 of 5 EAPA REEA RER MA AEMBE 1” 2” (DN25 DN5) ration eliminates the need to drain the system before installing the relief valve, while a built in test port allows hydrostatic testing without draining the system. For the love of god, do not adjust the EHA. Is With the old EHA valve installed I unplugged it while car was running, not much of a change except engine seemed starved for fuel after revving past 3000 rpms in park. When I went to get my car inspected, its failed due to a fuel leak on the top of the engine. 0bar. Since the pressure differential between the upper and lower fuel distributor chambers is modulated by the EHA you will need a CIS fuel pressure gauge (for VW) to install and adjust properly. . All forms of enrichment are accomplished by You have to check the lambda reading (mixture) now, will change after Testing fuel pressures to fix the lean running condition of my 560SEC ECE. Shell Test. Theoretically, the O2 sensor and the EHA valve will toggle back and forth. , mitral valve regurgitation is the most common form of any type of heart valve disease. 2:EH November 2023 3 Specifications Available Configurations See table 1 Common Characteristics: EH valves are single-port, high-pressure, globe-style valves with metal seats, cage guiding, and push- down- to- close valve plug action. Daniel Coe Discussion starter. This fuel distributor pressure regulator fits a wide range of Mercedes models, including 560SL, 190E, 300E, 560SEL, 420SEL, and more. The EHA (Electro-Hydraulic Actuator) is a flow control valve. Cleaned it up. EHA valves are angle versions of EH valves Need some assistance from the crowd. For the test procedure you will need (and know how to use) a decent multimeter with voltage, resistance, and amperage measuring functions. Jump to Latest 3. 25mA Deceleration = From -0. 29) A/F Turn clockwise to increase reduced 395 B Relief valve PED/CE 1 395 A B Relief valve 1 379 A B C Check valve 3 Part Quantity 356 C Hydraulic filter 1 356 B Hydraulic filter 1 356 A Hydraulic filter 1 352 B Needle valve 1 352 A Needle valve 1 351 Stop valve 1 301 Cabinet 1 286 Dust excluder 1 27 Inspection hatch 1 26 Discharge plug 1 13 Visual level rod 1 12 Manifold 1 11 Elastic Buy Prime Ave TPMS Tire Valve Caps (8-Pack) Alligator EHA Secure Air Pressure Gray Valve Stem Caps Compatible with Audi, BMW, Mercedes, Porsche, Tesla, VW & More (Made in Germany): Stem Caps - Conduction Test acc. AutohausAZ offers a large selection of CRP parts online. Remove the connector The EHA valve on my '91 500SL is leaking. 1 2 3. 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. Verified purchase. Car idles better than ever and starts up perfectly. 25mA Once running, it was better, but still rough and leaking. The cylinder block/valve plate interface is the most critical friction pair of EHA piston pump Increased Pressure/Temperature Ratings – Steel EH and EHA valves with buttwelding end connections have Intermediate Standard Ratings. The range from the main The test procedure says something about a connection between the over voltage relay and the IAV but my wiring diagram doesn't show any terminal #2 on the over voltage relay or any connection with the IAV. There is an electromagnet placed inside that either decreases or increases the magnetic field. 4. Much later, I The black lead is the positive lead. 4 Bar Working Pressure Difference The test box kit is designed to test proportional valves and their electronics. 39 posts · Joined 2016 Add to quote; Only show this user #1 · Nov 4, 2016. KB-valves and AxisPro valves . I checked the EHA valve and OVP relay and found Free on-demand video included on testing the EHA valve and related circuits. Cold engine - 0. 5 Test level: III EHA 2. current. Not sure how long the valve should last but that was best improvement ever. 8bar. This is actually a pressure test where normally air, inert gas, water, kerosene, etc can be used as the test fluid. A new fuel-test pressure kit is on the way from the States. 3. One has to measure voltage with the valve connected to get a useful result. 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. tcqlog kftzoh ygvak erram szlju yltzogp csdluu ipjk wyjynsxa ndgee