Testing eha valve with multimeter mercedes benz. If you have a leak Feb 10, 2015 · 1444 posts · Joined 2013. Take your air filter housing off and put your hand on the ICV and have someone turn the ignition on. No vacuum leaks. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! Mar 2, 2017 · Adjust Duty Cycle to around 50%, as recommended. I can push the sensor plate all the way down with or without the key on. 4bar less than Upper. And as mentioned, the EHA was busted and new rings were not going to salvage it. The duty cycle should decrease to 10%, that is, the multimeter should read about 11 volts. Hello Everybody, I'm new to Benzworld. Only adjust in 1/8th turn increments and testing the new settings to avoid over Apr 22, 2020 · Testing complete, with multimeter to be sure; The CSV is functioning 100% as designed. 7mA. Just got a thermo measurer and will check temperatures at each exhaust port tomorrow to see if I can pinpoint a cylinder or cylinders that have issues. Aug 22, 2012 · The EHA should default to a 50% duty cycle with the O2 sensor disconnected. There should be significant idle speed change when the connector is opened. I discovered the leak: found dampness below the EHA valve by the fuel distributor. Test 3 Same test Nov 22, 2009 · To measure the current at the EHA you need to set up your multimeter in series with the EHA valve. For the love of god, do not adjust the EHA. The 300e EHA valve part number is 000 070 39 62 Just wondering because I found a brand new (genuine Mercedes’ boxed) Bosch EHA valve for a 190e in my junk drawer, but I drive a 300e m103. More current more fuel passing. W124 E,CE,D,TD Class EHA Valve. Jul 25, 2010 · Take a brass drift and WHACK the Diaphragm Pressure Regulator a few times (metal cylinder adjacent to the EHA). My situation is exactly as The Fuzzy One described above. Nov 9, 2011 · Hi, Wife's '87 W124 230E has had the EHA valve diagnosed as leaking. Very dangerous and very disconcerting. I purchased my first Mercedes. It sets the difference in fuel pressure between upper and lower chambers. dropped to 1. He told me to find one at a junkyard instead of spending the money on a new which is like 300 bucks. One thing to add. 1 Ohm which is OK Manual states 20 Ohmcurrent of 15mA as shown here once running is OK per Megawatt Man from MBworld Feb 3, 2010 · In order to diagnose EHA, you need to check differential pressures on your fuel distro, as well as mili volts to your EHA valve. All right, after I discovered my high idle was caused by a faulty IAC, I've searched everywhere to find an affordable price for this part (000 141 16 25). It idles rough, and has a really hard time accelerating beyond 2,000 rpm. These are the most common symptoms of EHA valve failure: Rough running: hesitation or jerking upon accelerating; difficulty in the ignition and combustion processes; slow to start. I found a couple on ebay for around 100 bucks, anyway two questions. 44V with cross counts from 0. Never ran that well. D. It's the "muscle" for the ECU's "brains". Cheers! Free on-demand video included on testing the EHA valve and related circuits. Take a jumper and connect one harness side to the EHA prong. Please note that the 10% is nominal, 9% to 11% is seemingly OK. Cleaned it up. You don't do a valve adjustment like on the old M110 on a M117 (560 SL) The valve clearance is automatically adjusted by hydraulic compensators. 5v-5v spec. 4 bar lower than the “System Pressure“ (SP). Only now, it's running way too lean. Any advice appreciated. . #5 · Oct 10, 2017. This makes me think the fuel pump check valve and fuel accumulator are working. But when I did my research, all I can find was the o ring for it, I was thinking more of a plate like head gasket and such, the mechanic also did say it's not the o ring he is looking for. 1991 560 SEC Euro. IT. (2) Ignition on, engine idle, cold (ambient temp ~75c) : EHA current at start = xxxxmA, Duty Cycle= 50% steady. 468 posts · Joined 2015. May 24, 2018 · A failing EHA valve can cause concerning and dangerous side effects that make your Mercedes difficult, if not impossible, to drive—including serious engine problems. 4 Bar. Idle control valve operates smoothly when given 12v control voltage and varying current. Actuator Valve 2-437-929-007 MERCEDES-BENZ BOSCH Fuel Injection EHA Electro Hyd. Jan 17, 2013 · Deflect the air flow sensor plate. Also swapped the idle speed control relay from the 420SE just incase it pairs to the ECU better, The 500SEL was idling at 500rpm which is low but I don't remember it low like that before so it could be the 420 tuning on the 500. Remove this screw cover, being careful not to strip it, 3. Started smelling gas couple of months ago. If no change occurs, that is the reading still is about 3 volts, test the throttle valve switch (Job 07. As a rough, you could use fuel pressure gauges and get the pressure difference referenced in the manual. Part#: 000-070-39-62-MBZ. I am able to somewhat linearly modulate RPM with current. I am working on a 91 500sl that starts and idles good around 600-700 rpm when cold. My question relates to the EHA valve. If reading is correct, test is complete. After a few minutes of babying the gas pedal, it will run fine. Duty cycle= 30% steady. t had very little fuel in it when it arrived so I figured it was just old gas and maybe transport. General Mercedes-Benz. 9% of the time, you are masking the issue by adjusting it. Put on new valve and wow, runs like a brand new car. 3 and vacuum goes to -0. It is working constantly in cooperation with sensors on the fuel injection, especially th o2-sensor. Well the honeymoon is over. Took me about 60-90 seconds of cranking and then it fires, very slowly at first. Replaced idle control air valve. Like. Fits Audi 90 Quattro, 4000 Quattro Feb 1, 2010 · 1522 posts · Joined 2015. Oct 26, 2014 · The system consists of four basic sections: 1) The K-Jetronic mechanical fuel injection system (similar to that used on the 1977, 78m and 79 450SL) 2) The "Frequency Valve" addition, which is essentially a modified ELECTRIC FUEL INJECTOR inserted into one of the lines of the K-Jetronic fuel distributor. Filled it with premium, put two bottles of techron in it and drove the heck out of it. Max's reading: Engine cold: 741 ohms Engine at 80C°: 816 ohms. 1 to nr. Noticed dried gas by the eha valve. Mar 17, 2018 · I recently joined benzworld. Jul 13, 2002 · Last edited by pmizell; 07-13-2002 at 11:47 AM. I would go no more than 1/8 turn CW t get first adjustment. The car should start and idle high. Dec 16, 2009 · The EHA (Electro-Hydraulic-Actuator) is a electrical valve thats controls the control pressure on fuel distrubitor, it leaks out pressure. May 29, 2009 · EHA Valve 190e i have go through this forum and have read about so many eha valve problem,but none doesnt seem to answer about how to troubleshoot it how could i know that i have a faulthy Eha valve, Jan 17, 2009 · Test 1. If reading is incorrect on either test, repair short in circuit. 6L 10. 4 bar over night. Clockwise makes the fuel mixture rich b. Nov 29, 2009 · As far as your warm start and high idle for 1-2 seconds, that is accomplished by the Idle Control Valve operating for 10 seconds once the ignition is turned on, then it is released and the ECU controls the ICV operation. #8 · May 16, 2010. Dec 11, 2015 · The key aspect of the duty cycle check / adjustment is the EHA’s optimal operation range, which is given when the EHA’s valve plate oscillates (at the o2 sensor’s pace) around its currentless rest position at idle (0 +/- 3 mA). org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. I took out the idle control valve and threw some lube in there to be safe. Ground the other to the engine. I ran mine for 2+ years by coating it with liquid electrical tape! There are no adjustments on the EHA, so when you do repalce it, it's a screw-on job. , 1 mo ago. 87 We sell parts by Bosch or vehicle part number. This is the gizmo that takes the commands from the ECU and adjusts the fuel distributor pressure. 2 per unit. Several potential causes can increase/decrease this basic pressure difference. I am not going to mess with the A/F meter. You could check this with a fuel pressure gauge with the EHA unplugged. I bled the fuel pressure out of the system prior to starting the car after all work was done. Does anyone know of any cheaper and preferably closer to home. If you would be kind to support the channel you can do it via this linkhttps://www. She is running a lot smoother. Step-by-step instructions on how to test fuses on a Mercedes-Benz. Quick visual inspection lead to me find leaking EHA. I went to a few but they didnt have any. as the engine cools down it disconnects at 20 degrees C. 3 and see that there is generally one valve that fits many different models and engines from 1986 to 1993. :devil) when I stop at a light, if I don't "drive with two feet" to keep the idle rpm slightly elevated (just enough to see the needle rise a hair) when I hit the gas the car acts like it's starving for fuel, "playing with the pedal" gets ya going (the "knowing how to drive it" part, I'm Aug 26, 2013 · Since then, I have put another EHA valve on it. Apr 1, 2007 · I had success testing one by removing it from it's home while car is hot, and putting it in a 'dixie' cup to see if it was leaking down. They're now up to $1,300, when they were about $600 late last year. 2 to 6. So far, I've tried the following places: Jun 19, 2021 · With everything in order and zero EHA current (EHA electrically disconnected), LCP is about 0. Wondering if there is a difference on the 560SL ones. I still have a problem though. Welcome to Fuel Injection Products We specialize in Bosch Fuel Injection Systems Tested Pre-owned MERCEDES-BENZ EHA VALVE BOSCH 243 7020 007 Made to fit: MERCEDES-BENZ 500 SL (129) 5. Was assuming I could simply replace and the engine would run fine, without any adjustments. The difference between the pressures is caused by the programmed leak and is called differential pressure. A 1989 300E w124 with 67k miles. When the oxygen sensor fires up, the readout will begin fluctuating and you're watching the EHA adjust the mixture to maintain close to lambda, or 14. Nothing in the W201 emission system was meant to be adjusted on a whim. 9V Scope trace shows equal distribution of wave form. AutohausAZ offers a large selection of DPH parts online. 87 560 SEL (126) 5. With all 6 removed I get no fuel to the injectors. EHA current = 17. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! EHA Valves. See here for why adjustment of the EHA would be a bad idea. Oct 3, 2015 · When testing. Perhaps I might need to change the whole EHA valve. Did a smoke vacuum test today and no issues. General Mercedes-Benz Forums. 3. It seems to do alright going down the highway though! May 2, 2020 · So please stop adjusting if you would like to diagnose the problem. I think I even waited two or three hours between coats and the stuff dries slow. Jump to Latest Follow 294 Views 2 Replies 3 Participants Last post by H. 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 Jun 27, 2008 · 3) Either switch on the ignition or jump the contacts on the fuel pump relay so that you build up pressure in the fuel system. 85-08. Readings should be 12 volts with A/C compressor on and zero volts with A/C compressor off. paypal. At full temp idle is around 1500 with A/C off and 1200 with A/C on. I cant seem to locate where the EHA valve is under my hood. Perhaps your DPR is stuck and bypassing all the fuel back to the trunk. Manual has detailed procedures on each. In maybe 2-5% of leaking EHA's, will the O-rings be responsible for the leak. When i rev my car to 2500rpm the value doesn't go down 10% like it should. Jun 22, 2018 · Have 90 psi at Fuel Distributor. In by far most cases of deviated basic pressure difference between SP and LCP the difference is lower than the nominal 0. May 6, 2016 · He said I have a leaking EHA valve which he said is common in these 190e's. Unless the ones on your car are hard they need replacing but might as well replace them if you are getting a new Valve. Mar 29, 2010 · Govert70227. It is a closed loop system that is "self-adjusting" constantly. Mar 5, 2008 · 91 500sl High Idle. If out of spec, shims can be Feb 12, 2011 · osdesierto. It even died at a stop light the other day. Dec 8, 2022 · Maybe he meant the EHA valve? Not sure. #2 · Jul 26, 2015 (Edited) Check the EHA valve 2-pin electrical connector, next from FD below air cleaner. Set your meter to duty, put the postive lead into the #3 pin of the round connector on the l/h fender well. SO EHA should be incremental turns only. I'm nervous to tighten the torx bolts too much to strip the threads on the fuel distributor. The one I bought ($20 off of ebay) is supposed to be for a 190e, but it may be from a 2. 7. When you press the accelerator the valve connects nr. (3) Right After engine starts, at extreme cold engine (like 40F) EHA current will settle to ~+20mA - +40mA depending on the coolant temp, if above 50F, more like +15mA - +20mA. 4 diff, - all seams normal per the manual. The car has had the 4matic system removed so is only 2wd (front half shafts have been removed). Aug 29, 2002 · 1996 E320 2000 C230 Kompressor 1988 190e 2. Connect one lead of the multimeter to the other wire on the harness then connect the other lead to the free EHA prong. 3-121 in Mercedes shop manuals). Dec 11, 2014 · Low gas mileage. If it does, you have a problem with the ICV. Counterclockwise makes the fuel mixture lean 3. Feb 10, 2016 · Vizezeul Discussion starter. I THINK>>>. To actually test this one must view system and lower chamber pressure. EHA valve. Sep 28, 2004 · There is an adjustment to the electro-hydraulic actuator (EHA) that hangs off the back side of the fuel distributor. This morning was really tough - a bit damp out and in the low 50s - so not real cold. Read up on this because the procedure will depend on your car: Kat/non-Kat etc. 2 is connected to nr. SLK's reading: Aug 30, 2023 · Mercedes-Benz Sedan / Coupe / Wagon Forums. The 560SL that I bought is a little hard to start cold. Hot starts are fine and once car is warmed it, it runs Apr 1, 2020 · Here are some facts, see if your car is close enough: (1) Ignition on engine not running, EHA current = +20mA. It's very possible that in buying a new one, you'll still be in the 'range' to do a standard duty cycle adjust without fooling with the EHA internally (advise against it). If you are getting a miss, there should be a code. Temp signal voltage from CIS ECU to the idle unit is within the 3. Thought I would give this a try. 87 Hammer 6. The Bosch fuel injection electro hydraulic actuator or EHA valve is an integral part of the Bosch KE-Jetronic fuel injection system on your Mercedes Benz. 5/M8 X. 52 +$24. Two allens to remove if I remember correctly, and obviously leave the fuel line connected, just bend it away far enought to get it in a little paper cup. 92 560 SEC (126) 5. 4 Bar system/LC delta because with a new/ untouched EHA a 0+/- current indicates a . 4) Adjust the fuel mixture screw (remember you have to push down a bit harder to get the allen key to engage) so that the fuel stops coming out of the fuel distributor. I promised I would get back to you all when I finally fixed my engine stumbling problem. Kent believes this is the best tester for the buck. EHA is operatinal when the engine/Lambda sensor have been warmed up. So while your issue might be in the FPR (not Fuel Pump Relay) you wont really know until you read up on the duty cycle Sep 15, 2018 · EHA valve at idle is 0mA, -45 on deacceleration and ~+15 when blipped. 1 Ohm which is OK Manual states 20 Ohm210mV Voltage as shown here once running is OK per Megawatt Man from MBworldI Mar 17, 2010 · Then fire the car up and watch the mA start out at 12 or something on a cold start and quickly go down as the engine warms up. I`m from Norway and not so good at English. Now I have an issue I think with the EHA Valve or the OVP Relay and I need some feedback. It would have to be way out of alignment to cause stalls. they actually start leaking right through the body material, I guess it becomes porous with age. Make sure that May 27, 2016 · the vacuum line off the fuel pressure regulator is not active like it appears. So need to replace. Sep 20, 2020 · An then we can help you. I can crank the engine over and no fuel getting to the injectors as well. Vacuum gauge reading at idle is 17" Hg steady even with the funny miss/shudder. The common location of the fuse panels is under the hood, side of the dashboard, or in the trunk. Sep 2, 2018 · 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. 023. If the internals rupture, the pressurized gasoline runs thru the vacuum line into the rear of the right bank breather hose to avoid external fire. Feb 23, 2017 · Removal will cause pressurized gas to force out, cold engine and shop rags and a fire extinguisher. May 11, 2016 · EHA valve problem. The EHA is what adjusts the fuel mixture and it does that by info it gets from the o2 sensor and several other inputs. For select models of 560SL, 560SEL, 560SEC, 500SL, 420SEL, 300TE, 300SL, 300SEL, 300SE, 300E, 300CE, 260E, 190E Aug 23, 2023 · Find many great new & used options and get the best deals for For Mercedes-Benz 190E 1986-1993 Bosch W0133-1715115-BOS EHA Valve at the best online prices at eBay! Free shipping for many products! Mar 30, 2020 · CW- I also have a new EHS and I did check after your post and my cold start valve is fine. so far they don't work. Jan 23, 2012 · I am currently looking for an EHA valve for my 1991 190e 2. 4B delta You should make up a harness to test EHA current See link here beginning at about 4 mins for way to construct the harness. Valve - 0000703962 - Genuine Mercedes. 7 bar) is fed to the transmission. Switch off ignition: Unplug crank sensor from the ignition contol module mesure cps resistance between terminals 7 and terminal 31d. Click here for the M119 distributor cap MISFIRE fix. On most Mercedes-Benz cars, there is more than one fuse panel. If I had your situation, the first thing I'd do is check the TQ on all the connectors on the FD. A. Then when you plug it back in, it will typically run a little better and return better economy. Turn the multimeter on. A quick search has shown used on ebay for $30-$60 but won't risk that. Nov 26, 2018 · Have a 1988 model and noticed the EHA valve is dripping. 99 shipping Mar 3, 2004 · Mercedes released an updated overprotection relay with a red top and 2 fuses. Build a simple little 2-wire harness to interface the meter into the EHA circuit, so you can check the current during start and run. Nov 28, 2018 · It connects and disconnects the two terminals. I have an Euro 1991 w124 300E 4matic Right Hand Drive. IIUC, the adjustment is to compensate for other items in the mix that are wearing or worn to the point of tolerance. Jun 26, 2007 · Mercedes-Benz Forum BenzWorld. Check the EHA valve operation and influence. 0L 32V. The car sat for years and I believe the valve seal guides are leaking due to smoke at times. 3 - 225K miles, owned for 7 years. Aug 26, 2010 · Buy a little $30 Sears multimeter (#82139 or similar) that has current reading capabiity and duty cycle capability. If you need to change a rocker arm, the basic position of the hydraulic element should be checked with a go-no-go gauge. Runs really great, plenty of power. #1 · Feb 10, 2016. Jun 21, 2019 · Today I removed the fuel lines at the ends where they thread onto the fuel injectors. Count the flashes on Pin 8: 21 Ignition output 3 or ignition coil for cylinder 1 and 6. W124. Use M12 X 1. As the engine warms up it connects at 33 degrees C. pressure gauge line "1" or "A" to test port in lower chamber of fuel distributor. Remove threaded pipe plug from test port in lower chamber of fuel distributor. The mechanic (reputable) quoted me $400 for a new one. As soon as temp begins to rise the idle starts to rise as well. But instead of explaining in a long paragraph make it more boring and itemize your experiments like: (1) Igintion on, engine off. When I release the fuel feed coming in to the fuel distributor Dec 14, 2013 · IS there anyway to test an EHA valve on my 1988 SEL, its very hard to start. Then, the kicker, let dry for at least 6 hours before install. Nov 27, 2023 · As I understand if your EHA has not been played with the EHA current in lambda will give you a clue as how close you are to an ideal . Test 3 Same test Nov 6, 2010 · 2. See more. Feb 6, 2018 · 1. Slideshow Items. My fuel was pooling below the EHA. I've tried 2 used EHA Valve and the car idles at 400 rpm and dies. You can order it on partsgeek. Start it and let it warm up, set the mixture to 40 to50%. In my case, I set the Duty Cycle a bit higher than 50% as this made everything more responsive. Nov 4, 2016 · No no no, let me rephrase this. 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. 87 Hammer Wagon 6. Or, you can reference the Duty Cycle and see what the DC does at 2500rpm compared to Apr 1, 2023 · The EHA and FD are a matched set from the factory. 4 bar. Sep 2, 2021 · Hello everyone. May 15, 2010 · 311 posts · Joined 2008. Throttle Valve Switch Set multimeter to read highest ohm scale. (2) While cranking, EHA current = +60mA. mercedessource Product - Factory training manual procedure followed step-by-step. It almost feels like a solenoid activating. Jan 17, 2016 · E320Project. Jul 1, 2019 · But my gorgeous 560sl (86') just started running really rough the other day. Intake is completely resealed. once started, had 6. In the SUMMERTIME when the A/C is running (being used, in operation . If all involved components are working well, that EHA current corresponds with a duty cycle of 50%. The original ones had a gray or black top with only one fuse, and are highly susceptible to failure. Jan 19, 2019 · Find DPH, 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. When it is connected, the heater and fan for the climate control will operate. H. Jan 28, 2004 · The EHA valve is probably kaput. In theory, the Duty Cycle should change by no more than 10% between idle and 2000 rpm. 2 bar system pressure, and . It's a 91 500sl. Very well built, even at 225 it ran like new. Jan 8, 2014 · I just redid the entire rear end fuel delivery, including fuel filter, accumulator, new line between the pumps, and new pump backflow valves. 89-08. I know some people have adjusted it due to modifications on the engine, but 99. Locate the flat head screw on the back side of the EHA valve, 2. Aug 27, 2020 · The EHA is calibrated at the factory to produce a fuel pressure differential between the lower and upper chambers of the fuel distributor of 0. system pressure, close valve "1" and open valve "3" on first version or open valve on second version. You will be surprised by what Kent found on this 560SL engine. DPR sets main System fuel pressure at 6. The code differentiates which coil it is based upon the plugs. 3. Anyway, pull the air cleaner box, the connector and, two screws later, the EHA is in my hand. Jul 30, 2018 · Look up fuel pressure test - connect a fuel pressure gauge to the port on the passenger side of the fuel distributor. EHA mechanically sets lower chamber to . Using multimeter, test input voltage at ECU between terminal No. It sounds like you may now have more than one problem. Read the instructions carefully. Last week I noticed a fuel smell coming in through the vents. ok, being that your meter will read duty cycle its simple. Its only been one day but the car runs like a dream now however let me know if i am causing any damage. I did eventually replace mine. That screw does not adjust the fuel mixture, it only adjusts the operating range of the EHA. At idle nr. Turn the car on (don't start) and check to make sure you're building pressure and not bleeding any off. 1 to 0. Oct 29, 2021 · EHA (Electro-Hydrualic Actuator): Please see page 3 of this thread for EHA testing. The EHA valve on my '91 500SL is leaking. on shut off, I was expecting to see a quick pressure drop, but is held for a very long time. If you are having a cold start problem, a good way to see if the overprotection relay is the problem is to pull it out, and then try starting the car. com they are about $3/each. On particularly difficult to tune engines, disconnecting the O2 sensor and adjusting the system for the best drivability can often help. Connect fuel. Then I'm interested in testing whichever sensor controls engine management - the one connected to the ECU and Jul 6, 2021 · 2. One sells for $192 Jan 31, 2008 · Clean the EHA really well, which is pretty easy since it has been basking in fuel, dry it well, with an air blast preferably, paint the POR-15 slop on it, I did 3 coats. Reason is I see two different ones on Parts Geek site, both are Bosch. A 1. I purchased one used and replaced it, with the new one on the engine will not start, it just cranks and cranks. Everything hunky dory, but a after a few weeks I got a fuel smell coming from the front. Dec 5, 2021 · Wondering if an EHA valve from 190e (p/n: 000 070 40 62) will work on a 300e. I have found out that with the EHA hooked up when the motor is cold I have a little power off the line unless I floor it then it bogs down and then takes off. On a Euro 240D the switchover valve is used to make the transmission downshift to 1 to drive away. To make it clear terminal 7 is the small one in the center of the pluging. The cheapest new was $200 out of USA. Again, the small leak in the EHA will not prevent the car from starting. 1701 posts · Joined 2004. tldr-distinct odor of fuel when starting car Sep 16, 2020 · Fuel pressure test and multimeter test the EHA next on the cards. #2 · Feb 22, 2011. Jump To Product Details. 4. 0L 03. Mercedes-Benz E. 22 Ignition output 1 or ignition coil for cylinder 2 and 5 (Engine 111, cylinder 1 Jul 25, 2015 · 1447 posts · Joined 2008. I replaced the o-rings (50 cents each at RMEuropean) with new ones but I continued to have a leaking EHA valve. Problem with my 420SEL was that it ran rough at idle both cold and hot; at just below 80 degrees centigrade it would stumble when accelerating out into traffic and at time engine would just stop. #3 · Jan 18, 2016. Everything appears to be in operating order. Locate the fuse panel in your car. Let me know thanks Sep 9, 2012 · Substitute a piece of heater hose in place of the ICV. Actuator Valve 2-437-929-007 $159. I cannot say enough good things about this car. 19 and gound. Select your vehicle to item 4 MERCEDES-BENZ BOSCH Fuel Injection EHA Electro Hyd. Started and yes, small drip coming out of the weep hole. Have an assistant turn the key to the run position, you should feel or hear the ICV cycle into position. No gas leak. Nov 28, 2020 · This EHA Valve has a DC Resistance of 19. Jul 5, 2020 · 1986 560SL. Is your car O2 sensor working properly? How old is it? Any codes? Jonathan. I hadn't done any recent work on the car, and nothing out of the ordinary happened. I've had a fuel smell in the cabin whenever I depress the throttle more than half way ever since I got the car. 3 and full vacuum of the pump (-0. Jul 12, 2009 · 560SL Cold Start Valve. Jul 18, 2002 · The EHA valve itself reacts to varying current flow by causing the programmed leak within to grow and fall. 5mm or 2mm hex screw can be adjusted: a. Tweet. #3 · Feb 10, 2015. com/paypalme/IvicaFyMThe part that receives the output signal as cu May 22, 2011 · Ok so I replaced my Fuel pressure regulator and have alot more power in my 88 300 ce. 5) Remember if you deflect the air balance too far Dec 8, 2007 · Mercedes-Benz Forum BenzWorld. This is a classic Aug 30, 2012 · The settings on the EHA valve have to be fine-tuned for each car and Distributor. Not sure how long the valve should last but that was best improvement ever. This EHA valve controls the fuel inside the fuel distributor to each fuel injector based on demand from the fuel injection control unit. O2 sensor reading at idle is avg of 0. Mar 20, 2019 · I'm having a really hard time getting my SL to start cold. 87 Hammer Coupe 6. 401 posts · Joined 2015. Jan 2, 2013 · Deflect the air flow sensor plate. I have two questions: 1. May 15, 2010 · I discovered that my 190e was running to lean (70%) Using the guides from this forum i was able to adjust the mixture to 49% which is perfect.