Mercedes 450sl idle adjustment. Start car, warm up, adjust idle to 850 RPM.

Mercedes 450sl idle adjustment. A high idle around 2000 RPM with a non-adjustable idle screw often points to a faulty or sticking Auxiliary Air Valve (AAV). Can anyone tell me what it I was on the right track with the auxiliary air valve, until I confused myself by putting the inner sleeve in the wrong way? Aug 15, 2015 · When I start the (new to me) 450 sl, the idle is about 1800 RPM. Mercedes Diesel Engine Idle Speed Adjustment Diesel Mercedes 54K subscribers Subscribe Mercedes R107 faulty cold start injector causes no end of problems! 450sl, 280sl, 350sl and 380sl Mikes Mercs and other cars 9. Sales for North America were introduced in the United States in 1972. Set it in middle of range and experiment by moving it each side a notch at a time (rev engine in-between) . Customer: 1979 450sl that idles great but when put in drive the engine boggs down and stalls. I just wanted to find out if there was a way to adjust the fuel/air Jul 22, 2010 · It does make cars have hi idle in park but it drives 600 to 750 in drive depending on load etc AC. I bought a 82 380sl, had been sitting for around 7 years. - Mechanic fiddled Nov 7, 2022 · Part one, don't know a whole lot about what controls the idle on this car but learning! Mar 21, 2005 · Just bought a '74-450sl. Found no leaks. These are the 5. Runs good above 1000 rpm, runs rough at 700 rpm. High cold idle in the 1973 450SL with a 4. But when I turn it off hot and then come back after about half an hour, some cool down having 1979 Mercedes 450SL correct idle from cold start mikolajirl 344 subscribers Subscribed Jun 23, 2017 · Recently, I was having problems with my 84 380SL having a rough idle after restarting the engine during a partial cool down along with piss poor MPG. The idle after warm up is fine. In order to save fuel you should: • ensure that tire pressures are correct • not carry unnecessary loads • remove ski racks or roof- mounted luggage racks when not in use • not warm up your engine at idle and with the vehicle at standstill • avoid frequent acceleration and deceleration • avoid View and Download Mercedes-Benz 450 SL 1980 owner's manual online. Noticeably less engine vibrations both idling in park and when in gear at a stop. Modulator adjustment: If the shift is too soft or too hard Cleaning A Mercedes ICV (Idle Control Valve) Monkey Wrench Mike 74. Any suggestions on what I can check next? Today I will check the flow of the injectors into small jars and also resistances at the ECU connector, but I am running out of ideas. Dec 25, 2004 · Hello,I have a 450SL 1979--THE IDLE IS VERY HIGH UNTIL IT REACHES THE RIGHT TEMP, THEN IT'S OK-- ANYONE HAVE AN IDEA WHAT IS WRONG ?? THANKS DENNIS Dec 7, 2008 · guys, Im in quite a dillema. Typically plus or minus 45-degrees of rotation should be all it takes to go from too lean to too rich. Where are you in your rebuilding project - what have you already done to the engine and injection system? 1978 Mercedes-Benz 450 SL Engine Idle Hagerty Marketplace 1. If it doesn't change the idle rpm much go to 2. ATDC at idle . @cwmoser recommended to me in a different thread that I check the ignition timing. Condition is Used. If your acceleration is muted the warm up compensator may be broken or on its way to being kaput. This part has interchangeable part numbers 0001410825, 0 280 140 032, and 0001410525. Possible problems? Mar 4, 2014 · Hi, Does anyone know if the idle fuel adjuster located on the rear of the injection pump has a "stop" or "default point"? Does it continuously rotate past 360° or is there a stopping point that can be used as an adjustment reference. In the Feb 24, 2009 · Trying to diagnose my 3rd issue (other than the radio & heat issues currently). 5) Mar 31, 2025 · Discover the precision of Mercedes engineering with this idle control valve for your Mercedes 450 SL SLC. Is there a simple way to adjust the cold idle back down? High idle in a 1979 Mercedes 450SL commonly results from vacuum leaks, faulty idle control valves, or carburetor misadjustments. Testing and adjusting of two idle speed air valves which where both bought on eBay. Car hadn't been run in 2 years. My 450sl starts fine and will run for about 5 minutes until it gets warmed up. Mercedes Benz Classics: Owners Operation, Service, and Repair Workshop Manuals Mercedes 450 SL Manuals Directory SL Roadster - Jump to: R107 450SL Service Manual Listings Volume production for the first Mercedes-Benz R107 cars, the 350 SL started in April 1971. It seems like this engine likes to idle rich, around 12. With engine well warmed up and idling, try squeezing that hose. How to change the idle control valve on your Mercedes V8. Very clean ready for install. Drove it home and it runs well at highway speeds, but had Jul 24, 2011 · The Comprehensive Illustrated Djet fuel injection system (72-75 350-450SL) Thread FIRST AND FOREMOST: The Manual IMPORTANT!!!! I didn't find this for the first month, this is CRITICAL The Manual!!!!! Model 107 Second CHECK THE BASIC STUFF FIRST I know that seems obvious, but in rebuilding Mercedes 450SEL 280SE 280SEC 350SL Auxiliary Air Idle Adjustment Valve Housing. It doesn't do too much and won't affect performance once throttle is even only slightly open. 'Course this doesn't have a In this video I work on the 1975 Mercedes-Benz 450 SLC with engine M117 and Bosch D-jetronic fuel injection. Maintenance Manuals Features: Maintenance System Work Sheet Full Inspection Guidelines Component Adjustments Procedures Lubrication Inspection and Change Water Leak and Corrosion Inspection Scheduled Maintenance Adjustments Sep 27, 2010 · Slowly adjust for smoothest idle and/or maximum vacuum reading on an externally-mounted gauge. Can anyone tell me the difference between the Nov 26, 2018 · Good morning all - I have been working to get my 79 450SL with CIS K-Jetronic started after a couple years in storage. Mar 12, 2004 · Question 450 cold idle speed? Tinkering with a '77 450SL. The time now is 03:35 PM. After doing a bit of research, checking the FSM, and watching Every Tuesday and Saturday, we strive to provide you the best in the business. Problem solves when I put it in drive. It runs a bit rough at idle, irrespective, but runs off idel best at around 7 degrees BTDC. 5 : 1 A/F ratio. Aug 19, 2024 · If you’ve noticed that your Mercedes-Benz vehicle has reduced throttle response, hesitates during acceleration, or the RPMs are lower than normal, it may be time to perform a throttle relearn procedure. 5 turns back- messed my entire fuel ratio up. It’s crucial to begin with the basics, and often, the solution is simpler than you might expect. Jul 10, 2010 · Hi, I have a 1979 450sl which hasn't been driven frequently in the last 6 months. At that point it starts to run so lean that is stalls. You can do it pretty close by ear but an exhaust analyzer will make sure it's spot on. 84K subscribers Subscribed Customer: I adjusted the idle rpms to 750 as specified in the decal under the hood. So, the car has always run well, if hot, except for the idle. Warm the engine to operating temperature, then turn the screw slowly to increase or decrease RPM until stable idle is achieved. Jan 3, 2014 · The mixture screw set at 11 clicks from either end (center) for a full range of adjustment at this point. Idle speed too low; 1)Ensure that the ignition system is in good shape and also the intake is in good order. I have gotten everything running and in good order (fuel system and spark, etc. 02K subscribers Subscribe 1973 Mercedes 450SL High Cold Idle Issue Explained 450SL often faces high cold idle and delayed idle speed drop after startup in cold conditions. Checked all the hoses, replaced most vacuum lines and smoke tested the entire intake. As it warms up the revs drop and the Jun 24, 2008 · I am the proud owner of a 1980 450SL, which is my every day driver, but recently I have noticed a couple of things it has been doing and I'm wondering Jul 5, 2020 · Chasing my tail here 1986 560SL. Major work has been done by licensed mechanics although I have rebuilt engines and performed other maintenance in the past. Issue with cold start that I have to crank few times before it gets going (high idle about 1000 RPM). Jul 1, 2006 · Hello all, I'm new to this forumand hope someone can help. at 1500 RPM and 18-22 deg. Feb 7, 2009 · As a recent acquirer of a 1986 560SL, I too have recently begun to experience the aptly described high idle hell . Other refs say 7 degrees BEFORE TDC. Now every injectors are working properly so I may think that E Mail: sunvalleymercedes@gmail. com Before adjusting the transmission, make sure that the vacuum system is working properly. 020mm. It is an essential component of the air and fuel delivery system of your vehicle, ensuring smooth idle and optimal fuel efficiency. I am able to somewhat linearly modulate RPM with current. Then push down on hood a little while at same time ( inside the mercedes emblem in center of grill) pull up on lever inside grill. What is the correct timing for a Euro 450SL? Haynes says 5 degrees AFTER TDC. :30 minute check out identified: - when car is cold, the front right fuel hose to first injector weeps a little gas. Search Dec 20, 2024 · 1972-1975 Mercedes R107 350SL 450SL M116 M117 V8 Auxiliary Air Idle Valve OEM 1973 Mercedes 450SL aux air idle adjustment valve. The warm-up regulator applies opposing pressure on the injector pins of the fuel injector. Do I set timing at Fuel & Intake auto parts for Mercedes-Benz SL-Class (1972-1989) R107 C107: Idle Control Units and Parts and other parts related to Intake System Mercedes Mechanic: Marty When pulling up on the plate improves the idle when cold and also raises the idle when hot, it indicates that the overall fuel mixture is too rich. Feb 22, 2012 · If it does, just adjust the idle to about 500-600rpm after warming the engine up. I changed out the ignition distributor to rule out the springs, but no luck. to/3i7u8ZU My Mercedes recently started rough Oct 22, 2012 · Actually I did make a very slight adjustment to the idle mixture screw this morning using a 3mm allen wrench, turned the screw about 1/16th rev clockwise to enrich and the results were fairly significant. 1980 Mercedes 450SL (US) The car did idle at 1600 RPM cold and 1400RPM warm when I bought it. I can also turn it off when hot and it restarts, idles and runs great. The body will be the last of my task. First high then low and again and again. I reconditioned the mechanical AAV which is now working properly. 450 SL 1980 automobile pdf manual download. I have just finished rebuild engine harness in my 450 sl. Came from a running vehicle so tested and working as it should. 31K subscribers Subscribe Jan 4, 2022 · 76 450SL with no Idle Control Valve and K-Jettonic. IMHO using a busbar for grounds adds unnecessary connections - never a good thing - over running all the ground wires back to the block. 8K subscribers Subscribe Jul 24, 2025 · The warm-up compensator is also known as the warm up regulator. Once the cap is off you Apr 8, 2015 · Followed a stupid BMW mechanic's advise to turn the air/fuel mixture adjustment screw on my 1980 450sl all the way to the limit and then 1. The OEM part number 1160940712 ensures compatibility and a seamless fit for your vehicle. I have tested the fuel pressure 73psi (both warm and cold) and it is within specs. starts right up cold or warm a little sluggish but can make 90 on the freeway with no problem. Any suggestions or hints where to look for AAV rebuildAuxiliary Air Valve 450SLMark Habel Mercedes 560SEL MY 86/91 Idle Speed Adjustment Tutorial Part 1 - adjusting ISCV high idle when warm INOVA HIGHTECH Ltd. We look forward to producing The Classics for you With Your Aug 18, 2023 · It starts, idles and runs great when cold and also when completely at operating temp. Overall it's in great shape but has a history of stalling. After replacing the fuel pressure regulator and adjusting it fully, check the fuel return line for blockages or kinks restricting flow. Aug 13, 2007 · All times are GMT -4. After checking the vacuum system, the relays and the linkages you will find that most of the time the Oct 9, 2006 · My car keeps having too far advance when under revs. Oct 11, 2015 · Update to 450SL Idle Took the 74' into a local competent Bosch authorized repair center that specialized in older Mercedes. Sep 12, 2021 · My 1975 450 SL, purchased new by my father prior to his death, has 58000 miles; summer only driving and garage-kept. The previous owner said it was due to this part, however I'm having difficulty confirming that or even finding it in a manual (bought a manual on cd via ebay). Feb 23, 2025 · Before you start adjusting screws and dismantling parts on your Mercedes 450SL to fix a high idle, take a moment to systematically diagnose the issue. Adjusting valves on my (new to me) 1975 Mercedes 450SL with the M117 V8. . Sep 10, 2016 · Dwell set at 37. If it has a stopping point is there a standard tuning starting point such as "five clicks clockwise" or "six clicks counterclockwise" from that point? Thanks Feb 18, 2016 · The car starts from cold nicely and in about 2 minutes, is down to a comfortable 800RPM. Apr 30, 2014 · why does my 450sl stall? I have a 1980 450sl that has started stalling out when idling (stop signs, red lights, etc) - Mercedes-Benz 1977 450 SLC question ㉦Mercedes Ke-Jetronic㉦ - A special video on how to adjust the mixture on K-Jetronic#fixyourmercedes#viralvideo Instagram:https://www. That could get downright scary at times and I still have nightmares thinking about stalling at a stop light on one of our famous Seattle hills. After about 4 to 5 minutes, it drops to 1000 RPM. Please also see MBCA's video with Pierre explaining in great detail how to fix engine not To adjust the idle on a 1979 450 SL, locate the idle speed screw on the carburetor throttle body. The pump and filter were replaced about 2, 000 miles ago. Drops to correct level after car Sep 7, 2019 · For idle mixture only, you can adjust the ECU knob to your heart's content. Even after replacement, carbon buildup or vacuum leaks can cause the valve to remain open, preventing idle speed adjustment. Oct 10, 2016 · Hello The idle on my 450SL while the engine is cold is way too high. Easily adjust the screw to maintain optimal engine performance with this smooth-working idle control valve Apr 29, 2010 · Hi, Just picked up my first ever Merc a few days ago, a 1979 450SL and have found that it is not happy to idle once the engine is up to temperature, it cuts out when moving into drive or reverse from park or when bringing the car to a standstill. When you come to a stop while in gear, the idle is about 700 RPM. (at normal warm engine temperatures, it might then be about 700rpm). Nov 15, 2014 · Still working on the 1977-76 450 SLC Mercedes May 13, 2006 · My 1973 450sl has a M117 motor and in checking the timing I ran across the attached page in my manual. A common issue that we are now facing with the R107, the later style, is the sudden high idle. Some had essentially 0 clearance. I have new injectors, new plugs, wires, distributor etc. Is this expected? Perhaps the previous owner just cranked them all tight thinking tighter is better? Jan 10, 2008 · Heres the ongoing saga. I've read the related Service This video is about how to fix rough idle and engine stalling on KEJetronic I6 and V8 Benz W124 W126 R107. A follow up question: how does the 79 450sl/slc control the idle speed without an ICV? Only by the idle adjustment screw? Jun 23, 2009 · my 450sl from 1974 has a constant changing idle. at 3000 RPM all with with vacuum. I found that this model has a cold start Dec 9, 2019 · Recently needed to set ignition timing on my 73 450SL, USA model. The breather hose coming from the rear of the passenger side valve cover has vacuum - is Feb 19, 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) But how does one adjust the warm up regulator to control the air/fuel ratio at operating rpms? Jun 16, 2019 · Then set the idle rpm using that screw to about 600rpm. At speed, the amount of fuel to be delivered is taken from the setting of the control rod and is - more or less - not changeable. SYMPTOMS: car starts and idles and drives fine when cold. This makes it difficult to control the car as it wants to zoot off. Customer: I HAVE RECENTLY ACQUIRED A 1978 450SL. Assuming the vacuum and distributor functioning correctly, which one of the above three I have a 1979 450sl. There is an el shaped hose that joins the AAV outlet and the idle air valve (the one with the slotted screw). 008mm and exhaust . That explains why I couldn't find the ICV. Over the one year of ownership it has run badly (fixed with new spark plugs and distributor cap), then run quite well, then deteriorated (at this point installed Pertronix electronic ignition) then ran well again, then deteriorated again, had a timing adjustment and ran OK if the air intake temp sensor was unplugged and then, after two days Feb 28, 2006 · Hello all, My 450SL was idling rich after warmup, and after much reading I decided that a possiblity could be the warm up regulator. com/fix_your_m Sep 22, 2003 · hello everyone the 72 is running just fine now. From what I understand the last year the 450SL needed feeler gauge type adjustment was 1975 as the 1976 received hydraulic lifters. When i adjust the idle Dec 6, 2024 · The idle immediately settled down to around 650 rpm and the engine ran smooth as silk. Maybe it gives more power? Jul 31, 2009 · 2)Check and adjust the throttle stop and curb idle speed. 85 Mercedes benz R107 High Idle issue FIXED! 380 SL NSI Garage 2. System overview, testing, troubleshooting and a cheap 50 cent fix of the Idle Control Mod Nov 29, 2021 · Hi, I am having a problem with my 1974 450SL Mercedes, which is a D-Jetronic V8. I've used Seafoam Up for sale is a high-quality Auxiliary Air Idle Slide Valve, manufactured by Bosch, that is compatible with 74-75 Mercedes 450 SL SLC models. His idle was high so he tried to adjust air fuel mixture. However, the FULL THROTTLE switch is working just fine. Oct 20, 2008 · All times are GMT -4. Moving toward our YouTube channel’s third year of Classic Mercedes Benz videos Jun 18, 2016 · Please help - it is probably quite common Here is the advise: While watching the vacuum gauge, screw the idle air valve out until the vacuum begins to fall (idle gets rough). (The symptom observed was that I could push down on the airflow sensor plate and correct the overrich condition, but couldn't adjust it lean enough with the idle mix adjusting screw. 6L and 4. Former owner replaced fuel pump & filter. The idling was very rough and uneven, but after taking the air valve apart and cleaning Hi All, I am slowly getting my 1980 450 SL running like a new car. Note: 450SL was badged as a 350SL the first year introduced in the U. Is there a step by step Mercedes, W126 all 8 Cylinder - Airflow Plate resting adjustment, idle speed adjustment & issues INOVA HIGHTECH Ltd. I used a fuel system cleaner recently and now my cold idle is too high (1400 to 1600 rpm). Refer to our vacuum system repair and diagnosis page at: Diesel Vacuum system adjustments The two adjustments on your transmission are the throttle pressure (shift timing) and vacuum modulator (quality of shift). One good and in excellent condition and ideal for adjustment and the other ready for the trash bin. 98 (3. Idle seems spot-on at 750 in gear. Start car, warm up, adjust idle to 850 RPM. When I stop at an intersection the idle drops to 500 rpm. Idle control valve operates smoothly when given 12v control voltage and varying current. still Jul 11, 2020 · HELP! Have been trying off and on for weeks to troubleshoot fuel injection issues 1975 450 SL. Now slowly screw the idle air valve out again until you The Bosch fast idle valve is known as an extra air valve (EAV) as it allows extra air to bypass the throttle. To adjust the idle on a 1979 450 SL, locate the idle speed screw on the carburetor throttle body. Additionally, literature indicates 10-14 deg. Keep hoses to Feb 10, 2014 · SOURCE: How do you open the hood of a 1978 Mercedes 450SL? pull lever on driver side lower left panel. 2L models comonly A 19 psi fuel pressure at idle is high for the 1974 450SL, causing a rich mixture. If I adjust it to 2 deg AFTER TDC (to the left of TDC when standing infront of the engine) I can't get the rpm on idle above about 550 - the idle AIR screw does nothing. For instance, on the Bosch ECU, Mercedes does not use Pin 17, but VW does. The first of these is the distributor cap. Why do we have to trash malfunctioning WURs? Why do we have to pay Mar 10, 2017 · My local mercedes mechanic has serviced the unit and said that with engine not running no fuel should come out of the ports ( ignition on) When the Nov 17, 2016 · Hello I again need some help. Car starts up ok, but cold idle speed is around 1600rpm. Idles at about 1200 hot & cold. System overview, testing, troubleshooting and a cheap 50 cent fix of the Idle Control Mod Oct 15, 2014 · In troubleshooting and adjusting mixture, it appears that the IDLE switch on the throttle is NOT commanding the ECU into idle mode. Above is done with the vacuum connected. ) I removed it from the engine, unscrewed all the screws and nuts holding it Apr 1, 2012 · Background - After getting the car I did the usual, even though the car was running fine, new plugs, wires, fuel filter, oil change, drained fuel tank Mercedes Mechanic: Marty eurotec : Hi, your Mercedes does not have a carburetor it uses a mechanical fuel injection system. 5 V8 is typically caused by the mechanical or thermal idle control system. Running way to fast. As an Amazon Affiliate, I earn from qualifying purchases *Shop Amazon for Car Parts & Accessories -* https://amzn. Temp signal voltage from CIS ECU to the idle unit is within the Mercedes Rough Idle & Shaking. I'm guessing that the fuel/air mixture screw was adjusted on the rich side to compensate for the extra air going into the intake because the AAV was not closing properly. Nov 25, 2012 · All times are GMT -4. 3. The time now is 11:07 PM. All to be replaced - Idle was set too high. If you still get surging, try and find a sweet spot by adjusting the warm rpms down a bit. 1) Vibrating more at idle - Maybe it's just me, but in the last Jan 17, 2023 · It starts, idles and runs great when cold and also when completely at operating temp. I have a 1973 Mercedes 450SL. Apr 26, 2011 · Once you get the new AAV and the idle goes down close to spec, it will be time to set the correct air/fuel mixture. I jumped the fuel Mercedes Ke Jetronic- CO/mixture screw adjustment (air-fuel ratio adjustment) Sensor plate adjustment👉🏻Don't miss https://youtu. Where do I Apr 4, 2022 · Hooked it up to exhaust analyzer to set mixture but said leakage of my new exhaust system was preventing a truly accurate adjustment. I cannot get it to idle. The fuel mixture at idle is adjusted by turning the potentiometer on the fuel injection computer located under the dash on the passenger side. Put it in idle again Feb 5, 2022 · Viewers experience the virtual ride along to observe the Mercedes Classic automobile’s interior, exterior, and its beautiful handling. This vintage part is a testament to the enduring quality of Mercedes-Benz's craftsmanship. Inspect vacuum hoses for cracks or disconnections. (not good) once hot, it dries up and expands. 2. This should apply to all second generation Mercedes V8 Engines such as those in the Gen2 W126. IDLE WAS TOO HIGH, BUT WHEN I TRIED TO ADJUST USING THE IDLE SCREW I FOUND IT WAS ALREADY FULLY TURNED DOWN. Now screw the idle air valve in; the vacuum reading should increase for a while then begin to fall again (idle gets smoother/faster, then gets rough again). The time now is 11:53 AM. Mar 17, 2009 · well you got two connecting vacuumpipes attached to the vacuum advance on the distributor so the lower one is to retard the timing at idle to reduce emissions. Cranked it down and now settles at 800. Also for: 450 slc 1980. Read the shop manual--still not sure. be/7Dp5lQKcY2k#viralvideo In Feb 23, 2019 · You can adjust idle mixture to some extent using the knob on the ECU under passenger side dash. adjustment would be to turn the hex-key counterclockwise (Lean) until the engine almost stalls, then turn clockwise a little bit at a time until it runs smoothly. 100 Adjustment of idle speed 105 Checking and adjusting on-off ratio 110 Checking and regulating engine 120 Checking fuel pressures and for internal leaks 125 Checking choke system 130 Checking delivery capacity of fuel pump 135 Checking injection valves 146 Checking idle speed stabilization at idle, engine 116. Feb 18, 2007 · I have a 1979 450sl with 120K miles. How do I adjust this? Not a single D-jetronic manual manual mentions this. Moving toward our YouTube channel’s third year of Classic Mercedes Benz videos How to adjust the rich/lean fuel mixture on a R107 1977 450SL Mercedes Apr 23, 2020 · Idle fuel/air adjustmentHi, what do you mean with "I've basically backed the screw on the injection pump all the way" ? There are a lot of notches to back anti-clockwise (>60) to reduce CO and it's only relevant for idling. Being a carburetor guy, I think about a slow choke. Is this normal or is something wrong? Fuel consumption depends to a great extent on driving habits and operating conditions. Excellent condition. Feb 5, 2023 · Normally the screw you are trying to adjust shouldn't need adjusting at all, it is not meant to compensate for other problems. This is a May 5, 2025 · The distributor plays an important role in the smooth and efficient running of the engine, and while the distributor itself should last the life of the car, there are several components on or in it that wear out, need servicing or replacement over time. When I move the timing to TDC the engine sounds better and I can adjust the rpms with the idle AIR screw. instagram. 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 Feb 1, 2016 · Trying to set timing but not sure what I'm doing. Regardless, if you are working with a pre-hydraulic lifter Mercedes, it’s time to check out your clearances. Its the same gas I use in my 450 SL and haven't seen an issue in that car but who knows . If anything, I’d expect wear to cause the gap to be too large. 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. I took my hand vacuum pump and looked all over for a vacuum leak and found nothing. After getting to operating temp, it starts running rough, back firing, under powered (20 mph tops) and is generally unruly! CHECKS TO DATE Mercedes Benz R107 C107 Maintenance Service Repair Manuals 280 280sl 350 350sl 380 380sl 380slc 420 420sl 450 450sl 450slc 500 500sl 560 560sl Sep 24, 2011 · I recondition distributor on my car and reinstalling it, one problem is that I have no idea how to tune the ignition timing. Shipped with USPS Ground Advantage. Sounds like it may be a vacuum leak. The warm up regulator increases the fuel flow making the flow richer. (The symptom Feb 1, 2017 · As it pertains to many classic diesel or gasoline Mercedes-Benz, the job is very straight forward. Oct 22, 2013 · The approx. Any ideas? concerns advice would be greatly appreciated as I jave to hop over to the 107's for this as I think this was used on the 80 450 SL. Regards Bernt Mercedes R107 500SL with electronically adjusted idle control valve. Then the idle mixture is fine tuned with the screw and throttle switch plugged in. Intake is completely resealed. 9K subscribers Subscribe When the car is cold,it first takes about 10 seconds to start and then idles at 1500 to 1800 until the engine reaches about 175 degrees. 91K subscribers Subscribe Aug 10, 2018 · The service manual states that for a 1973 Mercedes 450 the timing need to be at 5 Degrees ATDC but a lot of people I have been talking to state it should be BTDC (I have it set at 750 rpm, 2 degrees BTDC with a dwell of 28 degrees - supposed to be 30 - 34 but finding hard to adjust to this). One strange thing I found. I tested the control pressure from the warm up regulator to This Mercedes-Benz document covers the engine model 250S and 280 SE - built from 1967 to 1972, and equipped with D-Injection system an early version - if not the first one (I guess here). To my surprise nearly every lobe was too tight. Car has a fast idle in park, in gear it's fine. WHAT NEXT? May 29, 2021 · Hi, New member here. When the engine is cold the warm up compensator reduces the pressure Customer: 1975 Mercedes Benz 450 SL. But when I turn it off hot and then come back after about half an hour, some cool down having May 5, 2015 · Right now I am 6 clicks lean on the idle adjustment, and 3 clicks rich on the full range adjustment. 4% positive Mar 11, 2002 · I'd greatly appreciate any suggestions on what might be the cause of a rough idle when the car is fully warmed The idle drops to around 600-650 Jun 2, 2010 · 1978 450 SEL High Idle 2000 RPMJust put regular unleaded in it. This Bosch Auxiliary Air Idle Slide Mercedes R107 500SL with electronically adjusted idle control valve. Turning the knob clockwise will lean out the fuel mixture at idle. Tag indicates 5 Deg. I did a fuel volume test both when it was cold and warm - ok. ), but I am having problems with the initial setting on the fuel distributor. Let’s walk through some essential checks to get your 450SL idling smoothly again. The mixture adjustment is located right behind the air flow sensor plate. As told, I bought this car a few months back Feb 18, 2007 · I have a 1979 450sl with 120K miles. Procedure says set intake clearance to . 2)Check and adjust the throttle stop and curb idle Testing the D Jetronic Components Main relay; 1)There should be 12 volts at pin # 24 of the ECU. Thanks! Andy Problem When I turn the car on the cold engine is shaking enough to shake the car. S. This is really strangehow do you adjust the idle on these things? Apr 15, 2008 · I am the proud owner of a 1980 450SL, which is my every day driver, but recently I have noticed a couple of things it has been doing and I'm wondering a) if anyone knows what may be causing them, and b) if they may be related. Maybe your whole FIP has to be overhauled 450SEL W116 R107 350SL 450SL Auxiliary Air Idle Adjustment Valve Housing ePartsLand (11778) 97. Is there a simple way to adjust the cold idle back down? Nov 9, 2015 · 1978 Mercedes 450SL Hot Car Start Issue I have a 1978 Mercedes 450SL which after running for roughly 15 minutes and stopped for 30 minutes will not re-start until the engine cools, so the car must sit for at least one hour after the car becomes hot in order to re-start effectively. No vacuum leaks. You should use a 4mm Allen wrench to turn the mixture screw in the counterclockwise direction. In neutral, it's about 1000 RPM. Runs for about 1/4 mile then stalls. Feb 4, 2020 · Every Tuesday and Saturday, we strive to provide you the best in the business. Apr 2, 2009 · Thanks guys. Top speed is about 40mph with little power. The distributor cap has a cover built into it and is removed as one piece. Engine is a M117 There was a AMG euro 126 in Australia that had this valve. Hello all, My 450SL was idling rich after warmup, and after much reading I decided that a possiblity could be the warm up regulator. Idle instability is generally caused by vacuum leaks or a sticky idle air valve. 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. 1972 Manual comes complete with pictures and diagrams describing full functions and troubleshooting. wrxf iwdij gopl cxrhdm risqwz gptmal maemjjp jei iofj fokb