Mercedes 300e fuel mixture adjustment. On older non-converter cars, CO should be anywhere from 1.

Mercedes 300e fuel mixture adjustment Nov 20, 2019 · Testing fuel pressures to fix the lean running condition of my 560SEC ECE. And they are adjustable for altering air and fuel mixture. I am going to make sure it is getting fuel tomorrow when I have my tools (left them at work). They don't adjust themselves. The time now is 11:49 PM. I have edited it to make it simpler, but the original text and investigation remains the work of Alan Kroliczek (in particular). Take the time to read it. trueHi All, I've got a 1991 300E M103 3. Apr 18, 2011 · All times are GMT -4. changed lots of things to get it running at her best. The time now is 06:23 PM. Mar 18, 2018 · Hello all, My name is Christian and I am a young mechanic working for a repair shop. When I press the diagnostic button 2-4 seconds, the led blinks once, but when I press it again per BOSCH KE3-JETRONIC MIXTURE ADJUSTMENT it just blinks again instead of coming on solid, so I don't get it. Apr 20, 2009 · Well i been working on my 1988 300e 135k on the clock. Jan 17, 2023 · The third is the fuel mixture adjustment. Which way to lean and which way to richen Thank you View and Download Mercedes-Benz 300 E 1990 owner's manual online. Mar 27, 2004 · All times are GMT -4. It's long, but contains a wealth of information. The car will start ok cold. (long) BoostnBenz Diesel Discussion 19 07-13-2003 01:18 AM 1988 300E jumpy oil pressure gauge at idle asiamood Tech Help 3 01-16-2003 11:17 PM Fuel mixture becomes richer at idle ralden1 Tech Help 7 12-28-2002 10:30 PM Rich Fuel Mixture, Poor Fuel Mileage - after front end collision - '90 300E Wayne Lindholm Tech Help 1 12-05 Customer: Hello, I have a 1990 Mercedes Benz 300E that won't start. Any good shop has a 4 gas analyzer. Apr 13, 2008 · Warm up regulator (WUR) Calibration / Control pressure calibration or adjustment How to calibrate the k-jetronic warm up regulator Applies to: Most K-jetronic mercedes engines, the type without electronic lambda controls. 1986 Mercedes 300E Gasoline Engine: Air-Fuel Adjustment Issues 300E often faces idle instability and engine starting problems after air-fuel mixture adjustments. I have cranked clockwise over 40 full turns, and either the screw is stripped, or it has a verrrry fine thread on it. Buy a 1986 Mercedes 300E Fuel Filler Neck Seal at discount prices. I read some owners on the forums who fixed their problem by leaning the mixture. Runs good above 1000 rpm, runs rough at 700 rpm. I recommend getting a decent quality allen piece or set and use a light touch. 6 california model and I'm getting nearly random data from x11 pin 3. Peter Jul 12, 2009 · Also if that is the case how do I go about adjusting the fuel mixture on this car? keep in mind this is a 230E with the M102 Euro motor. 7 to 1. . Fuel is reaching my fuel distributor, but it isn't going past that point and into the injectors. At first start, the duty cycle is exactly 50% until it warms up and goes closed loop as expected. I have the proper tune-up parts on the ways from Mercedes Source: 201 124 126 Chassis 103 Engine Ultimate Tune-up Kit | MercedesSource. ) Mercedes 190 mixture adjustment 190mex "Repair my Mercedes" 2. 010. Mar 2, 2017 · All times are GMT -4. Insert Allen, then press down GENTLY to engage the key in the screw. It does have a similar adjustment hole on the air cleaner assembly. This channel teaches you how to diagnose and repair the CIS-E (KE-Jetronic) system on Mercedes M102, M103, M104, M116, and M117 engines Oct 6, 2009 · Hi Guys, A friend of mine has a 380sl 1985, it was running rich so they adjusted the 3mm allen screw behind the air intake, now it won't start or run Sep 28, 2013 · Guys, i'd like to adjust the fuel mixture on my 300e, but the problem is, i don't know where the adjuster are located. The idle mixture screw controls fuel flow; turning it too far disrupts combustion. Oct 5, 2007 · I am working on a 1985 380SL with 80K that was off the road for 2 1/2 years. Aug 26, 2010 · All times are GMT -4. ), but I am having problems with the initial setting on the fuel distributor. I had the very common issue of my EHA valve leaking, as I was smelling gas in the fuel bay for the last month. The time now is 01:41 AM. Ordered a new EHA valve and installed without adjusting, and the car wouldn't start. They only really require adjustment if the fuel distributor has been overhauled, or major work has been done to the engine (ie overhaul). Jun 1, 2009 · Anticlockwise is weaker mixture (corresponding to a lower pin3 voltage and a higher duty cycle) – fix this in your mind as you adjust! Each adjustment will need 10 secs or so to stabilize before taking the reading. Mercedes 300E Smart-Tune Race Tuner Kit's major aim is to attain this override to Elevate your car’s Power Output. On older non-converter cars, CO should be anywhere from 1. G3/2 Heated O2 Sensor ----- Testing the Component Mercedes Benz Model 124 Oct 16, 2025 · I can't really do a basic mixture adjustment on the fuel distributor as I continue to get these error codes on the X11 port, so I can't actually read the duty cycle to determine the current mixture. A 1989 300E w124 with 67k miles. org I see the Lambda control adjustment usually being called ‘duty cycle adjustment’, or (not really suitably) ‘mixture adjustment’ or ‘air/fuel mixture adjustment’, which can easily lead to (and possibly often reveals) misconception. BTW, fine tuning of the idle is set using the air screw near the hose coming from the air cleaner. The time now is 03:19 AM. It is not the OVP as that is brand new. 6L Coupe 1986 Mercedes-Benz Mar 28, 2007 · My father also has a 1985 380 SL that is in need of an adjustment to the air/fuel mixture. doc / . 45 volts on average and keeps fuel mixture at 14. If you are getting no fuel and the adjustment is the reason, pushing down the plate will get you fuel. … May 23, 2009 · I'd like to make an adjustment to the fuel distributor. It the EHA valve locate on the fuel distributor mercede 300e 1987 ,the eha vavle have a screw on the back remove screw and adjust , how to set it back to factory setting. HC 3. Nov 6, 2010 · The fuel injection system used on all Mercedes-Benz gasoline engine vehicles uses a basic CIS injection system for fuel delivery and electronic controls for mixture correction functions. Also for: 280 c, 280 ce, 280 s, 280 se, 280 e, W124, 260e 4matic, 260e, 300e 4matic, 300e, 230ce, 300ce. That will most likely get rid of the flat spot. 300E 4Matic 6 Cyl 3. I recently joined benzworld. The time now is 09:06 PM. Welcome and good luck. 4 (Limit-1 Jun 12, 2007 · You have the mixture trim adjustment, right? CO, Co2, HC, and o2. Jun 18, 2014 · My fuel pressure regulator is not noticeably leaking through the vent hose (the one that looks like a vacuum hose). I've basically backed the screw on the injection pump all the way and I can't get the idle to go down (turning it anticlockwise when viewed from the driver's perspective). Nov 23, 2014 · Hi guys i want to adjust the idle mixture on my car, smells as though it's running a little rich. The procedure on 'how to' apx adjust the a/f mix is in the forum archive. Hopefully 2 clicks will get me around 13:1 Anything less than full throttle though, and I get around 18:1 A Mar 24, 2009 · Once it stopped starting I replaced the fuel filter. May 8, 2014 · I'd like to make an adjustment to the fuel distributor. I messed with my fuel/air ratio (that screw in front of the air cleaner on the contour hose) and my SL-C will not go over Duty cycle readings from 1987 Mercedes 260E at idle and 2500 RPM. Why do we have to trash malfunctioning WURs? Why do we have to pay Post 583085 - Mercedes-Benz Forum and Technical DIY Discussions for Enthusiasts. Nov 26, 2018 · I have gotten everything running and in good order (fuel system and spark, etc. On a meter, this would be 0V. (on ebay for less than $200) Make sure the engine is off when you adjust the screw or you will strip the threads. Resolving Mercedes M103 idle issues - Free download as Word Doc (. I purchased my first Mercedes. mechanic invoice says : "requires fuel injection system ECM part # A008 545 81 32 (0 280 800 320). To get more fuel pressure at high RPM you'd have to take the Warm Up Regulator apart and if you could tweak it to increase fuel pressure once the At the same time I turn the 3mm allen mixture adjustment with my other hand. Choose top quality brands Genuine, Kayser, OEM. PeachParts is NOT affiliated, sponsored nor authorized by Daimler AG. H. So, is that is?? (Red arrow. I turned the knob with the required Allen key but didn't notice any difference. It's important to understand this concept before trying to fix things. The time now is 01:43 PM. Premium diesel. 05K subscribers Subscribed Buy 1986 Mercedes-Benz 300E Genuine Air / Fuel Mixture Adjustment Wrench W0133-3702197. At this point, you can use a 3mm Allen wrench to adjust the mechanical fuel mixture at the fuel distributor. Nick ~ Nick Costa Rica 1996 Mercedes Benz C280 1988 Mercedes Benz 300E (SOLD) My site TicoVista for costa rica real estate and more. 5. There are two screws basically. pdf), Text File (. <br> <br> This is a euro-spec '91 300E hence it is the ke-jetronic fuel injection and hence mixture is adjustable. Locate the idle mixture screws on the throttle body; turn them slowly to achieve a smooth idle and optimal RPM. Jan 10, 2008 · Heres the ongoing saga. So my son tells me his 1992 300E is getting pretty bad gas mileage, car runs great, emission testing done, HG done, lots of new parts? Today I adjusted fuel mixture to lean, see if that helps, if Customer: I have a 1989 Mercedes 300E, hard start and low idle when cold - once it gets to 80degrees, the idle is high 1200+. If it doesn't fix it you should take the car in to the dealer to get it looked at. Before I change anything, the duty cycle is about 55% and gradually (over the course of 3-5 minutes) goes all the way to 100%. com I know I need a multimeter to adjust the Air Mixture properly, but Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. This video is related to my previous video concerning the fault Mar 8, 2013 · In our DIY section is a link for "fuel mixture adjustment". The fuel injection system is extremely complicated and a step by step approach must be used to diagnose problems even as seemingly simple as adjusting the idle. The time now is 08:21 AM. This Awesome Magnum Part cannot affect engine reliability or longevity. As you can see, the idle adjustment screw on the carburetor side part. com/shopforum/index. Jun 12, 2002 · I'd suspected the idle mixture of late, though I thought it might be a single dodgy injector. Unfortunately, I don't have that 16-pin diagnostic port, only the X11 one near the EZL on the inner fender. These resemble flat head screws mostly. To adjust air and gas on a 1992 Mercedes 300E, start by warming the engine to operating temperature. As a rough, you could use fuel pressure gauges and get the pressure difference referenced in the manual. S. I am using the voltmeter method as I do not have a DMM with duty cycle feature. There are a variety of classic Mercedes Benz cars still on the road today, ranging from the iconic 300 SL Gullwi Fix your KE-Jetronic Mercedes the right way — your way. 02’ by fine-tuning the air/fuel mixture) - the Mar 30, 2012 · Let the car idle and heat up to 80C. Fuel economy is still good so I haven't been too concerned. 300 E 1990 automobile pdf manual download. Don't mess with that yet. i wrote to you a while ago and you suggested adjusting the fuel mixture. txt) or read online for free. com/shopforum/forumdisplay. X o2 I don't remember looking at. Oct 24, 2016 · … continuation of post #1 Purpose of the adjustment: Since, as I explaned in post #1, the air/fuel mixture is unchanged, no matter whether the system is adjusted to a higher or to a lower duty cycle … what is the purpose of the adjustment? It’s the EHA’s optimal operating range with regard to: - Lambda control (keeping ‘λ ~ 1 +/- 0. docx), PDF File (. I It takes special skill to adjust the mixture correctly on a CIS injected car. Digita Idle fuel/air adjustmentI've connected the vacuum to the inlet manifold (see photo) and when I adjust the air screw to get best vacuum I also get a very fast idle (1200-1400). Oct 29, 2021 · Hi everyone, With the motivation and push from a few members (specifically H. Adjust the curb idle with the engine warmed up and the choke off. If the electronic control unit View and Download Mercedes-Benz 280 service manual online. I told them that this will lead people to think that the purpose of this adjustment screw is air/fuel mixture adjustment. This is a doc using significant contribution from other authors - I claim no copyright or origination for it. May 4, 2013 · When I adjusted the fuel mixture, I used the meter my father has at his place to do the adjustment, and ended up putting it back how it was since I wasn't sure if that was the problem because adjusting didn't help. It won't start. Jun 12, 2009 · To adjust the fuel mixture a small 3 mm Allen screw is located within the airflow sensor; this alters the relationship between the sensor arm and the control plunger. Adjustments were made with air filter housing on and 3 mm hex wrench with T handle. If the car is turned Oct 9, 2006 · All times are GMT -4. 0%. Right now I am 3 clicks rich on the full load adjustment, and 3 clicks lean on the idle. Aug 27, 2025 · Our Mercedes 300E Engine Computer Chip will allow you to steadily alter the Air Fuel Ratio by dialing an adjusting knob, and will fool the stock lean fuel mapping. It would be a good place to start and won't hurt nothing. It's my guess that as written it won't work for any vehicle powered by the M104 or M119 engine, and that includes some W124 cars. Discount Genuine W0133-3702197 Air / Fuel Mixture Adjustment Wrench Online at AutoPartsWAY. Bosch KE3-Jetronic Mixture Adjustment Mercedes suggests that special tools are required to adjust the mixture on the Bosch KE3-Jetronic (CIS-E) fuel injection, such as is used on the 1988-91 560 series motors. The time now is 04:52 PM. This is just to have it all in one place. Oct 2, 2013 · I would try to lean, or enrich with the fuel mixture screw, to keep the engine running. Oct 8, 2009 · All times are GMT -4. I was a bit fed up and rebuilt the air filter to go for a drive, which was no different from the ones before the first 3 attempted diagnostics. Or, you can reference the Duty Cycle and see what the DC does at 2500rpm compared to Sep 7, 2019 · For rich or lean operation with throttle open, small mixture adjustments can be made by adjusting fuel pressure using the fuel pressure regulator and a simple pressure gauge teed into the fuel rail somewhere (some use the line to the cold start valve. May 25, 2011 · just bought a nice 300e :) apparently it has an intermittent problem (usually when warmed up) of no power when at a stop and attempting to accelerate away. Is it likely that the tuning has moved or could I have a dodgy injector? Manual 200 200 E 230 E 260 E 300 E 230 CE CE 260 E 4MATlC 300 E 4MATlC What You Need to Know at the Petrol Station See last page Drive Sensibly — Save Fuel Fuel consumption depends largely on how the vehicle is driven and on the operating conditions. Among its sensor plate which mustn't rub the edges of its housing the second precondition for its healthy operation is also the CO- or the mixture screw adjustment. Please understand that there may be minor variations between the engines (2 pin vs 4 pin/EGR/Non-EGR) Dec 7, 2008 · guys, Im in quite a dillema. Dec 27, 2020 · And I tried hard. I *know* I need to adjust the idle lambda control as I just Jan 19, 2013 · Professional FD rebuilds or exchange units are expensive, so owners avoid that and look elsewhere for a problem (like the EHA or ICV or mixture adjusting etc) and even perhaps go searching for a JY used cheaper unit hoping that is better? Here are some images that might help to assist you, and let me know if you require any further assistance. The mechanic adjusted the idle while it was cold, so I believe its hard to start from getting too much fuel. It can be measured as dwell angle or duty cycle at the car’s diagnostic socket. Mar 12, 2010 · Figured I'd start a new thread since I'm delving into CIS-E troubleshooting here. I jumped the fuel pump and no matter how I turn the adjustment screw, there is no change to the fuel supply to the opened line on top of the distributor. Also, I noticed that as I step on the gas, the eha current drops to zero or lower depending on how hard I rev the engine. My car is an 1989 300E, i want to switch my distributor Feb 19, 2010 · Save Reply Quote Like benzslcworld Discussion starter 8 posts · Joined 2009 #7 ·Feb 20, 2010 So one can adjust the air/fuel mixture at idle by turning the idle mixture adjustment screw, as seen in diagram above (thanks isthisdave for pasting this) Oct 23, 2009 · There are other forums to explain mixture adjustment. Do not adjust a thing at this time. i turned the lean at least a whole turn ccw Mar 9, 2004 · Join Date: Feb 2004 Location: spokane, washington Posts: 53 fuel mixture adjustment where is the fuel mixture adjustment screws on a 87 420 sel? thanks Jul 28, 2011 · More confusion I'm getting very confusing results from the mixture adjustment. Choose top quality brands Genuine. And - guess what! - even most professional car mechanics think it is. Which way to lean and which way to richen Thank you Jun 6, 2001 · Should the fuel injection pump timing and pump main rack require adjustment as part of a tune up on a 1969 280SL? I'm getting conflicting advice on Aug 17, 2009 · A correctly adjusted mixture is showned in this video (duty cycle is fluctuating around 50%). If the mixture adjustment does not help there is a little tweak that can be done on the EHA valve that mounts to the side of the fuel distributor to alter the fuel pressure and make the car a little richer on acceleration. 0L Wagon 1992 Mercedes-Benz 300TE Base 6 Cyl 3. I plan on going 2 clicks richer on full load. I stopped the fuel mixture adjustment there as I was concerned about overly enrichen the fuel mixture and causing higher rpm at idle. cost $1000 Aug 6, 2012 · So don't go tinkering with it until you've exhausted every other possibility. Jan 5, 2007 · All times are GMT -4. com Buy 1990 Mercedes-Benz 300E Genuine Air / Fuel Mixture Adjustment Wrench W0133-3702197. Jun 21, 2014 · The basis for the mixture adjustment is a square-wave voltage which is generated by the CIS-ECU (based on the input from the o2-sensor, at which’s frequency it fluctuates around a center value). To solve the problem, I had to perform a KE Jetronic EHA Adjustment. 0 engine. 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) Feb 16, 2004 · Can anyone advise on the location- if it is present of the adjustment screw on either the flow meter or the fuel distributor that allows mechanicaly Buy a 1987 Mercedes 300E Air / Fuel Mixture Adjustment Wrench at discount prices. Quick visual inspection lead to me find leaking EHA. Dec 28, 2015 · The fuel injection system used on all Mercedes-Benz gasoline engine vehicles uses a basic CIS injection system for fuel delivery and electronic controls for mixture correction functions. Any help is appreciated. Feb 16, 2004 · Can anyone advise on the location- if it is present of the adjustment screw on either the flow meter or the fuel distributor that allows mechanicaly Buy a 1987 Mercedes 300E Air / Fuel Mixture Adjustment Wrench at discount prices. Jan 17, 2023 · When the engine has heated up and the system has entered "closed loop" the fuel delivery is changed according to what the O2 sensor reports from the exhaust. You need to establish that there is no vacuum leakage first. 1988 W124 300E with M103 in Australia I'm in West Australia and I got the car at the start of summer last year, no real Oct 18, 2019 · In that case to get to Mercedes units, your Duty cycle is 21% to 29%, so the EHA is having to lean the fuel mixture quite a bit for whatever reason. Jun 4, 2009 · EHA Adjustment M103 EHA and CO Adjustment Issues (KE Jetronic Experts Please) - PeachParts Mercedes ShopForum EHA Valve Mercedes 300E EHA Valve - 300E E. PeachParts Mercedes-Benz Forum (http://www. Oct 29, 2025 · On modern electronic fuel-injected vehicles you certainly can't to amend the Air/Fuel Ratio in order to wake supplemental aggressive HP with re-jetting, like on carb power plants. The time now is 06:03 AM. I figure this is pretty close to spec. Upon time of adjusting the Fuel Mixture Adjuster, EHA Valve Adjuster and the Ignition Coil and Rotor Cover i noticed the fire triangle in this Vehicle was determined by Fuel Mixture Adjuster, EHA Feb 9, 2012 · I'd like to make an adjustment to the fuel distributor. The document summarizes the CIS-E electronic fuel injection system used on Mercedes-Benz gasoline engines from 1986. It describes removing an anti-tamper device to access the adjusting screw, and using a scan tool connected to the X11 diagnostic port to monitor fuel mixture levels using duty cycle readings while adjusting the screw. 280 automobile pdf manual download. Accelerating at full throttle gives a steady 15:1 A/F ratio. Apr 29, 2008 · I can't find the seat of the air/fuel mixture screw. sometimes i get the 85% fixed thing. But im having few more problems with fuel mixture. 0L Sedan 1990 Mercedes-Benz 300SEL Base 6 Cyl 3. peachparts. Last week I noticed a fuel smell coming in through the vents. Remember- if it was running perfectly fine, it's probably not the mixture adjustment. Aug 30, 2012 · The settings on the EHA valve have to be fine-tuned for each car and Distributor. The idle was about 800-850 rpms. I've had this car for over 4 years now, and this is my first serious attempt to fully adjust and fine tune the fuel mixture since the missing o2 sensor was reinstalled. Dec 9, 2005 · In addition, how does O2 have to do with air/fuel mixture adjustment? If O2 sensor is functioning it means to me that once the car is warmed up the O2 sensor will do its job of constantly adjusting the air/fuel mixture to the optimal setting. Oct 28, 2016 · Here at BenzWorld. my son kept driving the car before we did and his mileage fell off to about 7 mpg and he had carbon all over the back of his car from the cloud of smoke he was putting out. Mar 12, 2009 · 1993, W124, 200TE manual: How do I adjust the idle speed? Mine is a little low and needs a gentle tweak. Adjusted half a turn more rich, and the car ran ok, but I could tell there was a power issue at higher speeds. D. 7 ratio. You should be able to turn them by using Mar 31, 2006 · That will explain how to remove and clean the ICV (Idle Control Valve). 0L Wagon 1989 Mercedes-Benz 560SEC Base 8 Cyl 5. 437. You have multiple issues going and the fuel mixture screw is the LAST thing to be adjusted, not the first. Jan 29, 2009 · Trying to pass smog and the last thing to over come (famous last words) is to adjust the idle with no surging. I have a - Mercedes-Benz 1990 300 Diesel question Buy a 1993 Mercedes 300E Fuel Tank Vent Valve at discount prices. The system uses an electronic control unit to monitor sensors like the airflow sensor, coolant temperature sensor, oxygen sensor, and more to control the fuel injection and achieve the optimal air-fuel mixture for different operating conditions. 0L Sedan 1987 - 1991 Mercedes-Benz 300E Base 6 Cyl 3. Which way to lean and which way to richen Thank you Feb 19, 2011 · The goals of the fuel mixture adjustment are (1) less than 10 points difference in duty cycle % at idle and at 2500 RPM, (2) a smooth idle and (3) responsive just off idle. Jayare Do what Jayare says first and check all the lines for vacuum leaks before adjusting the fuel mixture. People underestimate the difference between K - & KE -Jetronic regarding function and, particularly, regarding diagnosis. However is it still possible it's Jun 8, 2011 · 1991 300E 170k Car is hard to start hot and if left for a few days without running. Nov 21, 2012 · I richened the EHA and leaned out the fuel mixture adjustment, to reach 50% duty at idle, 45% at 2500rpm, and 40% underload while driving. The car is now running reasonably well, but is not without its problems. 0L Sedan 1989 - 1991 Mercedes-Benz 300SE Base 6 Cyl 3. It sets the difference in fuel pressure between upper and lower chambers. Mar 26, 2008 · This is a 1986 300E, 117KMi. Jan 7, 2015 · I would try to lean, or enrich with the fuel mixture screw, to keep the engine running. Regarding the fuel mileage, mine never gets more than 300 miles per tank on mixed driving but that may be a problem with a dent in my tank. php?f=1) - - 86 mercedes May 30, 2010 · In my vision first you check leaking in fuel system focus at fuel distributor and injector no leaking or stuck second you check vacumm engine system if complete you can go on if no you can't adjust mixer m103 for 14. For instance, on the Bosch ECU, Mercedes does not use Pin 17, but VW does. Also for: 260 e 1990, 300 ce 1990, 300 e 4matic 1990. A. All times are GMT -4. Dec 7, 2021 · Here in the diagram, you can clearly notice the location of all the necessary parts for adjustment-making process, which we will discuss in later parts. Incorrect air-fuel mixture adjustment can cause the engine to stall or fail to start. 0L Sedan 1992 Mercedes-Benz 300TE 4Matic 6 Cyl 3. I've used Seafoam May 24, 2012 · Ok, so I've spent close to a month with this issue and searching threads all over the internet and can't seem to find many with this exact problem. Insert a 3mm Allen wrench and adjust air/fuel mixture screw by pushing down until the spring loaded adjuster Fig. Which way to lean and which way to richen Thank you Jun 28, 2005 · I'd like to make an adjustment to the fuel distributor. Dec 5, 2010 · Most of this info came from you guys, but I did go off-site for a couple of things. The air/fuel mixture screws should be adjusted with the engine warmed up and at normal idle speed, then turn each air/fuel mixture screw in one at a time until the engine just begins to mis-fire, then back the air/fuel 4matic 3. cars. Oct 26, 2014 · Further adding to confusion and frustration with K-Jet adjustment, is that even from the same year, some manufacturers utilize different options with the same Bosch hardware making their adjustment procedures similar yet incompatible with Mercedes 450SL/380SL procedures. - Dec 3, 2015 · Well if it's running well, the last thing you want to touch is the pump ( timing, regulating linkages are correct) you will probably need to adjust the fuel injection pump using a CO meter. When trying to adjust the air/fuel mixture this weekend I did not observe the behavior I had expected to see with the volt meter. ;)), I have decided to create a new thread to consolidate all testing procedures surrounding the M103 engine. When the computer is controlling the mixture, it will read something other than 50% and will change all the time. 2 to 2. Same goes for my coupe which has the M104 motor. Oct 25, 2016 · The mixture adjustment procedure in this thread was posted in the R129 forum and found to be unworkable for all U. After driving for 10 minutes the car begins to run rough idle at low speed and when at stops/accelerating from stop and most of the time will stall at stops. A balanced O2 Sensor will show 0. Hoping someone can help. Customer: is there any linkage i can shorten or adjust that might help speed up the idle a little bit. I have replaced ovp relay, fuel distributor and fuel pressure regulator and cold start valve. The time now is 11:59 AM. These adjustments are intended to be followed by an actual exhaust gas CO check to ensure legality. Nov 21, 2005 · First, the adjustment on the mixture control unit between the fuel distributor and the air meter flap is for setting the mixture, not for setting idle speed. I took it off to adjust again, made it Base nut adjustment of KE fuel distributors. 0L L6 change vehicle 1990 Mercedes Benz 300E Air / Fuel Mixture Adjustment Wrench Buy 1990 Mercedes Benz 300E Air / Fuel Mixture Adjustment Wrench Online Many businesses in the vehicle and auto parts industry are aware that often times the people working at a location are equally important as the product that a business sells. I bought a 82 380sl, had been sitting for around 7 years. The goal is to set the Oct 27, 2009 · I have a 1990 300E 2. How Do I adjust the idle--it is too low Jul 19, 2010 · I have two spare fuel distributors, one is from a 1990 300E and the other from a 1987 300e. I'm guessing that every movement of the wiper shaves off a thin layer and in time this alters the resistance of the potentiometer which affects the fuel mixture adjustment. The time now is 05:36 PM. HC should be under 200 Co2 if I remember was around 14 or 15. May 5, 2015 · I am getting close with the fuel mixture. It's an 88 300ce. The dedicated shade tree mechanic can do it, but needs to be well-informed first. 43, engages with the adjustment screw in the air flow sensor arm. ;) Nov 22, 2003 · All times are GMT -4. com The document provides instructions for adjusting the idle mixture on a Bosch KE3-Jetronic fuel injection system used on Mercedes vehicles from 1988-1991. Basically my car failed emissions pretty grandiosely. Oct 21, 2005 · In my case, a slight tweak to the lean side (ccw) made my first W124 (86 300E) smooth out, idle like a sewing machine and have instant throttle response. Jun 16, 2015 · All times are GMT -4. But don't take my word for it, there are plenty of threads to be found in the forum archive. I‘ll reply via this thread (as far as time-wise possible), so that other forum visitors can benefit too … if they are interested and trust my info/advice. Choose top quality brands Genuine, MTC. Sep 23, 2005 · if they are talking about the idle mixture control adjustment on the fuel distributor assembly, you need a duty cycle meter connected to X11 pin 3 (pin 2 is ground), and when the car is fully warmed up (80-82C) with AC off ('0') and all accessories switched off, you adjust this with a long 3mm allen wrench inserted thruogh the rubber grommet on Sep 28, 2004 · All times are GMT -4. general rough running. Valve - Bosch 3. Mar 26, 2008 · I've had this car for over 4 years now, and this is my first serious attempt to fully adjust and fine tune the fuel mixture since the missing o2 sensor was reinstalled. php) - Tech Help (http://www. Jan 3, 2012 · at least now I know why my fuel mixture adjustment was so off. The screw is part of a Y fitting that goers into the intake manifold. I'm a little confused though, the Jun 19, 2021 · Already quite some time ago several forum members asked me to speak about “EHA adjustment" and recently another member asked me about it. Feb 6, 2015 · The adjustment screw is spring loaded, so you may have to stop pushing down to get the actual air / fuel mixture point (as far as i remember). I need to adjust the air/fuel mix on my carburetor 1990 Mercedes Benz 300E with a 3 litre in line 6 cyl. So I had to get my car tested for emissions this year in CA, I always test duty cycle to make sure the fuel mixture is good, this time readings were way off and something was wrong, turned out to Feb 6, 1990 · 1990 mercedes 300e 2. 6. Aug 21, 2005 · I always thought that the CO adjustment was only for fuel mixture @ idle?? I'm not an expert by anymeans but I know that the CIS System on VWs is similar (some even have K-Jetronic), but on the VW CIS that adjustment only increased the idle mixture. jlhho nryg cnba rbui nzmup xdvmi wunv pucjio tchm zhj hlwtvg hkwis hkqto hcbj zihew