M103 rough idle. And done many tests or inspected components.

M103 rough idle The car will then stall when accelerating from idle. which could account for the stumble (and would also be The only thing I hate about the m103 is that it seems to always develop a rough idle. on cold days my car will warm up to about 80 degrees Celsius but when I drive it drops to around 50 sometimes 40 with the heat on high. M103 Rough idle and vacuum leak My 89 300 SE with 262k miles has developed a rough idle. Conversely, an excessively high control voltage will also cause a high idle situation. Jump to Latest 121 - 140 of 183 Posts. 1 5 of 10 Go to page. The car sometimes idles rough and low, and sometimes, it idles so perfectly I have to look at the oil pressure to make sure the engine hasn't stalled. The idle at park isn’t great, but it doesn’t sound super bad, maybe a 20% noticeable difference from its usual. 2L V-8 of that era. This is probably linked to the behaviour stated above. The unit I bought had two fuses in the top while the unit originally installed had only My M103 idles rough too. Posts: 10 Hi all! Sorry to Hey guys, Have an interesting problem with my 1988 300CE m103 idle. D. OK, I have read many of the M103 posts on 'rough idle'. 6K views 5 replies 3 participants last post by 300SE_elie955 Apr 24, 2016. The car starts on the button and idles and revs perfectly when cold. Rough idle can be a number of things, but I would first check all your vacuum lines. Its not even a continuous problem as (New Owner) M103 Cold Start and Rough Idle. 6K views 3 replies 2 participants last post by benz420 Apr 22, 2006. Posts: 1 190e rough idle. 9 volts. This does not happen all the time though,mostly when exiting the freeway and coming Hi! I lately have some weired issues with my M103 engine. 1 8 of as the idle problem always followed such periods; once the car had been running for several hours, it would generally start and run pretty well—until it sat for another week or three. EHA unplugged, car running, and readings were The only thing I hate about the m103 is that it seems to always develop a rough idle. The car has been running rough while idling for about 3 months. M103 Rough idle and vacuum leak. The idle gets smoother as anyways, I had similar erratic problems with my 300E M103 I6, and after trying everything else, it turned out to the injector seals, they would intermittently leak small amounts of air, causing a rough idle, and a stumble-stall when you tried to accelerate away form a stop. W124 M103 1987 260E rough idle. This happened twice. It was sitting properly. ENGINE SUSPENSION | Mercedes-Benz M 103 Standard, North America, Japan 103. 6 (and 3. Last night 2 minutes into my commute, it stumbled hard but recovered. Jump to Latest And the M103 is more economical than the 4. So far I've:-Changed most parts on the ignition system spark test showed all good. At this time, if put into Drive it will stall. The engine seems to be hunting as It will randomly have fits of very rough idle and what sounds like misfiring. Then I drive, back off accelerator and engine idle drops to 600, and sometimes dies. codycool55 · Registered '89 300 SE Joined The M103 is quite demanding regarding distributor cap & rotor and M103 Rough idle and vacuum leak. With all above and this the car runs perfect. Its not terrible, but enouth to be aggravating at Hi I’ve been having an issue with my 86 300e with the m103 motor. And again , like before it was a copycat problem, and even then it never came to me to check the ht leads This time i did everything i Our attempted weekend fix on the 260e with an idle-stalling problem, we cleaned the IACV valve and CIS throttle body with carburetor cleaner. I did notice that the idle felt a bit rough. Any advice or experience with these issues, help. Helped start and smoothness. Location: Canada. After everything I've done it starts up everytime, never stalls, but does idle low and rough for about 10-15 secs. But I took it out anyway to check the O-ring which seals it in the tube. Also checked the trans fluid level and found it 1L low, ouch. at 130 C oil By design,the motor is supposed to idle around 1000 upon initial start from cold. Discussion starter · #81 However the idle and performance are still a bit off. This is a doc using significant contribution from other authors - I claim no copyright or origination This is becoming a constant nightmare. both at idle speed and at ~ 2500 rpm, once with the EHA electrically connected and once with the EHA electrically The hesitation quickly worsens over about 5 to 10 minutes. My car has had all the above attended to over the past year and ran very well, but still refused to idle smoothly. Go experienced with the micro switch on your car had very probably to do with a not very well known peculiarity of the M103‘s (and the M102‘s and M104‘s) IACV. With all that in mind, members who really understand how the KE-Jetronic works should now be able to tell you in detail what to do first in order to fix this problem without wasting PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help: 300TE M103 rough idle when pointed down hill. It would rev up to about 850 RPM and then slowly drop down to 700 or Streetcruiser, the best oil treatment for your '89 M103 (in case you have not done so already) is to open the valve cover and add the V shaped washer in the middle of the oil dripper inlet is. Additional Rough Idle Causes. Clunky/Jerky shifts in all gears all the time. By MB service information your M103. filled it back up and that also helped in ridding the shaking at idle in gear. Then engine heats up to 80C. once rolling the car ran OK at any speed. CC doesn't work. And done many tests or inspected components. Once in a while, the RPM drops for a second then jumps back up. After checking the injectors, several were spraying streams and non uniform patterns, I had some spare ones so I swapped them out as well as my cold start valve. I had a valve job and head gasket done at 140k. I have a Feb 1989 built, 300 CE auto with the M103 3 litre engine. bought the car with a rough idle sluggish until around 1000 rpms 2. H. It felt, to me, that it get progressively more rough and then the engine controls would rev the engine up a bit and it felt better. I also measured the Duty Cycle and it's moving betwen 69% and 79%. 222 posts · Joined 2019 Add to quote; Only show this user I have a 190e that currently has a rough idle and lack of power intermittently that I'm going through and getting everything sorted before using it as a daily. On warm starts the car will crank over and fire quickly for a brief moment and then die. I used some fuel I did notice that the idle felt a bit rough. Until then it idled so. Has roughly over 240,000 miles on it. Registered User : Join Date: Mar 2005. , the IAC is electrically disconnected), the engine will receive some idle air - enough in some cases to cause a high idle. I pretty much replaced everything fuel, air, and spark related. I want to assure you that on M103 Rough idle and vacuum leak. #11 11-20-2017, 10:27 PM danny500e. Within a few seconds, it drops and settles in the 600-650 rpm range. PeachParts Mercedes-Benz Forum. - Lubed all the throttle linkage and springs, it appeared they were sticking a little causing idle to be eratic some. A bad OVP relay will also cut power to the IAC and cause a high idle. txt) or read online for free. but I noticed I did not check the injectors. If you have a rough idle with the 2. Tags engine m103 rough acceleration. No real test but a matter of tracing the vacuum connectors to look for a loose connection. Starts cold/Hot fine now, idle in P, D, D w/AC, etc. 6- 5-speed Manual - 200K miles, 95 E320 Sportsline-sold, 2001 E320 4matic Wagon-sold Very rough idle. radunegru Discussion starter. C. The idle is a little on the low side, around 500 rough choppy and "hunting" for the M103 low idle speed, vacuum issues causing a misfire? This is my first gas vehicle in over 10 years. I have no vacuum leaks, 2 new fuel pumps and fuel filter, spark plugs done yesterday with I have a Feb 1989 built, 300 CE auto with the M103 3 litre engine. Didn't make any difference to the high idle though. The engine seems to be hunting as the idle will go very slightly up and down. Occasionally when coasting my engine will speed up and stay there for a few seconds before returning to normal slightly rough idle simply because whoever checked the engine oil level did not fully seat the oil dipstick in the tube I stopped to check the dipstick. BUTwhen. Please also see MBCA's video with Pierre explainin 190e rough idle User Name: Remember Me? Password: Register: ShopForum Gallery: FAQ: Calendar: Today's Posts: Search LinkBack: Thread Tools: Display Modes #1 03-20-2005, 11:16 PM ttau. I do expect the car to show it's age by now with that M103 Rough idle and vacuum leak My 89 300 SE with 262k miles has developed a rough idle. 6, then it's not the idle speed to blame. Bad OVP primarily causes starting problems. ON a good running M103 engine the engine idle speed will drop when you disconnect the electrical connection when the engine is running. The fuel distributor just increases the amount of fuel to the injectors as the airflow sensor plate is drawn down. Also it seems to me there is a substantial amount of Hi, Finally after a 7 day delivery from Germany i got the new temp sensor installed. It is when the idle speed seems very low, although it runs. I know where the rattle comes from, it is not inside We may earn a commission for products purchased through links on this page I have a 1988 300SEL. PeachParts Mercedes-Benz Forum Porsche straight sixes have a rough idle "by design"?! User Name: Remember Me? Password: Register: ShopForum Gallery: FAQ: Calendar: Today's Posts: Search I’ve replaced the air filter, fuel filter, injectors (with new top seal, o-ring, & nylon sleeve), plugs, 2 top intake hoses + 2 hoses to the idle PeachParts Mercedes-Benz Forum W124 M103 1987 260E rough idle - Page 2 - PeachParts Mercedes-Benz Forum Rough idle when cold (Solved) Jump to Latest 38K views 70 replies 5 participants last post by cadman777 May 22, 2024. Carolina28 Discussion starter. I recently had the top end rebuilt on my 300CE. Jump to Latest 161 - 180 of 183 Posts. Install them with a torque of 20 Nm and don‘t forget to clean the recesses they sit in (best with compressed air) before you remove the old plugs. 1 volts to about 4. Also, when I start the car first thing in the morning it will crank for 3-4 seconds and will start and die and when I restart it it will run normal. The idle speed is moving in sync with the duty cycle %, slightly higher idle at 79% and slightly lower at 69%. And M103 Rough idle and vacuum leak. As far as I know, the M103 engine has no idle control unit/relay. M103 hard start, rough idle, hesitation SOLVED: tryan: Tech Help: 9: 02-12-2003 05:00 PM: All times are Smoothed idle out some. After a few hours rest I try to do give it a go again, it idles somewhat fine, but in drive this time it seems a little better, maybe get up to 1600 89 190E2. Jump to Latest 1K views 4 replies 4 participants last post by NordStern Mar 28, 2005. 6 has developed a rough idle and I have narrowed it down to a fuel problem. The abs light also comes on after 1-30 minutes of driving and when I brake on lower speeds my abs gets activated and vibrates the break pedal. 300SE_elie955 Discussion starter. The 2. It runs fine fo My car 190E 2. If I leave the car idling in Park, the rough idle/shaking will suddenly disappear after about 20-40 minutes of idling. Very rough idle, no start situations, frequent stalling, very low idle (reached 300-400). Registered User : Join Date: Nov 2008. Runs fine when underway, good gas milage, 1-2 shift is kind of rough, changed that transmission vacuum line as well. where the idle will fluctuate and nearly stall sometimes. When starting, the rpm also fluctuate between 700 and 1500 for 40. You need to get rid of any vacuum leaks as the lines get brittle with age, and don't forget checking the rubber boot 1. doc / . 116 posts · Joined 2006 Add to quote; Only show this user #1 · Apr 22, 2006. Vacuum leak may produce a fluctatuating idle speed. Any ideas M103 Intermittent Rough Idle. I would not accept an answer that a M103 has an inherent rough idle. When warmed up it idles at around 550-600 rpm. D. codycool55 · Registered '89 300 SE Joined Jun 4, 2013 · 69 Posts. After idling for a while, it drops so low that it stalls. Only two hoses on this idle air valve (M117 V8's have 3, a bypass hose as well). 1 3 of 10 Go to page. Jump to Latest 181 - 183 of 183 Posts. If the valve is leaking through, you could be running a rich mixture at idle. There has to be something wrong here: Idle speed needs adjusting; Loose or faulty distributor cap; Dirty fuel filter; MAF (Mass Air Flow The idle control on a M103 engines operates by of a "duty cycle" voltage signal. On restart it runs, albeit slightly rough. 43 posts My m103 2. 3. 0) is an extremely well-balanced engine. In Park, when throttling a bit—say up to around 1,500—the misfire stops. I replaced these parts around the months of February, March and April 2023: Air filter; OVP Relay (URO Parts) Spark plugs (Correct NGK copper model) Distributor rotor; Distributor cap (Bosch Rough Idle only at Cold Start then runs fine after 10-15 minutes. What is a fair amount to pay to get this type of check up done? Any other suggestions regarding the rough idle. It can be restarted and will idle rough with the car shaking. it starts fine and idles around 1000 to 900 rpm in park when cold. The roughness got worse gradually. 1 9 of non-resistor copper-core plugs for the M103. S. I am told that the idle setting should be 0. 500E Kid : Join Date: Feb 2012. It’s as hard as hard plastic and it has shrunk, so that it can’t seal anymore. 1 10 It ramps up quite nicely/smoothly from 0. After about 5 to 10 mins as the car warms up it runs very rough as if running a very over rich The most common cause of a rough idle in a gasser is a vacuum leak somewhere, but you really didn't say anything about being rough. 983 should have: Idle speed 650-750 rpm Oil pressure Speed rpm at 90 C oil temp. Jump to Latest 81 - 100 of 183 Posts. 1 7 of 10 Go to page. purge of air from 1989 260E M103 Engine rough idle Jump to Latest 3K views 9 replies 4 participants last post by gruber260e Oct 14, 2013 This characteristic means that with no control voltage (e. Basically the fuel pump will prime, turn the key and it initially fires for about a second and die, cranking and cranking it will then catch and idle at about 450-500rpm, obviously if you go And don‘t forget the effect that Lambda control can have on the idle speed control function chain (which in case of M103 engine includes the AFM potentiometer). Hello, Early 1991 300 SL r129, M103 I get a rattle sometimes just on starting when the engine is warm or it is a warm day. W124 2. 6 M103 engine and is located in North America. On a cold start the engine turns over quickly and idles very smoothly. 190e 2. 6E M103 1989 Apr 19, 2021 #2 Did you try the IACV In the process of trying to sort out the cause of the high idle, a process which involved 50+ emails, one important point has emerged: There is not one common configuration of idle air control used over the production run I suppose that it could cause rough idle at first as the affected cylinder(s) would not be up to temperature and would need to catch up with the others. The power during acceleration it used to have isn’t there on the freeway. Vehicle History: 2nd owner and no service records. I pulled out my O2 sensor yesterday and gave it a good clean. Inputs to the CIS-E ECU & an internal map in the ECU determines the correct duty cycle, should be 30%(approx +-). My 86 M103 engine has been sitting for almost a year. It is a 1988 300E in very nice shape, body wise and interior wise. MY 86 W126 300SE is idling a bit rough. The most common cause of a rough idle in a gasser is a M103 rough idle. 7 volts. I recently replaced the O2 sensor at the recommended 60K miles and it idles worse than before. The idle is very rough 500-1300 rpm and doesn't matter if the car is hot or cold, what's weird is sometimes it runs fine sometimes not though. صورة #1 | دقة الصورة 638x896. pdf), Text File (. Jump to Latest 61 - 80 of 183 Posts. In addition, I replaced all six injectors, the fuel accumulator and filter. - Adjusted CO adjustment. The car now has about 175k on M103 hard start, rough idle, hesitation SOLVED. When I bought it, it had aprox 130K liles on it. While I had the fuel distributor off I M103 Running Rough - troubleshooting. If the above suggestions don’t fix the problem, try these out. I let the car idle at operating temp and starting from cylinder #6 I pulled the plug wires one by one. The car starts on the button and idles and revs perfectly when Rough idle W126 M103. 6 has had an idle issue ever since I have owned the car, it always eventually starts but it is a bit touch and go when its really cold outside. I have been driving it for the past few months, but the engine idles a bit rough, especially when in gear. Around this time last year, I had a similar issue, even worse. When I engage drive or reverse the idle seems to drop to If not, it gets difficult and frustrating - and possibly expensive, too. I have no vacuum leaks, 2 new fuel pumps and fuel filter, spark plugs done yesterday with Bosch H9DC non-resistor plugs, K&N filter is good, even if I have the air cleaner housing off at M103 Rough idle and vacuum leak | Mercedes-Benz Forum . M103 rough idle/hesitation solved. Each time a pulled a plug wire, the car idling would get much worse until I put it back. My 300SD had 3 bad glow plugs and was hard to start but idled okay although smoky. After driving and while deceleration, when the engine reaches around 1000rpm, the car suddenly accelerates and rpm goes up to 2000 and falls back down again, repeately. In fact, while being good practice for general maintenance, none of the above made any difference at all to the rough idle. After Set the correct upper/lower bowl pressures by adjusting EHA valve according to CIS flowtech guide with fuel pressure gauge. As one who bought my first M103 new, I never experienced any missing, roughness, or uneven idle until around 60,000 miles. So far New Fuses,Oil Change, Trans Fluid/Filter (still clunky/jerky), Air Filter, and ICV (cleaned w/ throttle spray). Posts: 604 M103 rough idle and stalling Resolving Mercedes M103 idle issues - Free download as Word Doc (. Since my ABS light was going on and off intermittently, I decided to replace the OVP. In the fuel circuit, you may also want to do functional test on your cold start valve. Essentially, the shorty 300SE is an easier 126 to maintain even if it lacks a few of the bells and whistles. 569 posts Changed the oil, went back to conventional shell rotella 15-40, smoothed things out a touch and picked up the pressure. On and off, same thing. DavidLeeRoth Discussion starter. Go. It appears to have helped as my idle is much more consistent on level ground. , The CP stop screw was at the proper depth so I cracked the FD in two. First it clears up for months and then it returns. 983 Parts Catalogs | PartSouq 1992 300 m103 vacuum 300TE M103 rough idle when pointed down hill. Happens every time. Jump to Latest 41 - 60 of 183 Posts. Problem: Cold start OK. - Adjusted Idle up a hair. 0 1989 model runs rough when drive is selected it is ok in reverse, park & neutral Worn piston rings can cause oil to seep into the combustion chamber, leading to poor combustion and a rough idle. Then only last year i had it again on my W124 260e m103 engine . Spark plug cables can fracture especially if improperly plucked when disconnecting from the spark plugs. at 600-700 M103 rough idle and stalling . (M103 engine) I think I will replace the spark plugs and get the distributor cap checked. A vacuum leak can cause a rought idle. To be precise, a fuel problem at cylinder #1. 300te m103 rough idle. Idle at 800 rpm. It idles very rough at first, hesitates when accelerating from a stop, and idles roughly at stop signs and stop lights. I went through and changed every rubber vacuum connector I could find with new hose, and I'm reasonably certain I got nearly all of them (namely the ones on the lambda m103 rough idle m103 rpm jump mixture. Otherwise, sooner or later your Rough idle first min after start. Jump to Latest 1. Jump to Latest The engine idles kind of rough. Occasionally when coasting my engine will speed up and stay there for a few seconds before returning to normal My car (a 1991 W126 M103 300SE) has had a rather rough and irregular idle since I acquired it from an MB dealer (with approx. : Yesterday a thread appeared here in the 126-forum about a high idle / idle “creep“ that was allegedly caused by a faulty AFM potentiometer. This video is about how to fix rough idle and engine stalling on KEJetronic I6 and V8 Benz W124 W126 R107. The injectors on the M103 are 'always on,' hence CIS (continuous injection system). Release the throttle and it's chugging again. It idles very rough at first, hesitates when accelerating from a stop, and idles roughly at stop signs and stop lights. Jump to Latest 2. Jump to Latest 141 - 160 of 183 Posts. while watching the voltage on pin 3 at the x11 diagnostic port (I don’t have dwell setting on my It should be 750-800 in neutral or park, and around 500-600 in gear (R or D). When the car has been off and sitting for 30 minutes or longer and still warm it is very difficult to crank and it runs very roughly when it finally catches. g. docx), PDF File (. . 1 4 of 10 Go to page. 10. Like when cornering, or after a high speed (50+ MPH) run, to a stop light. Rough idle change a NEW(not a used one) fuel distributor Been having a rough idle problem and have not been able to diagnose what is wrong. Since my ABS light was going on and off intermittently, I My 89 300 SE with 262k miles has developed a rough idle. In a fuel injected car, I believe that it can cause a low, but not necessarily rough, idle. It's all done via the CIS-KE unit and idle air valve - this valve is under the air filter on the M103, just in front of the air intake. Helped some. Porsche / BMW actuator that is giving me a rough idle while stopped in "drive". Anyone know what a good fully closed starting point should be? H. Hi guys i hope you can help. Hi, I am a newbie to this forum and thanks in advance for any help which is much appreciated. Rough idle and low power off the line is not indicative of a faulty OVP. The weird thing is when i stopped at traffic lights on a slope the idle was really rough but fine again on the flats. Mine is a 1990 year model with 2. It would rev P. 95,000 miles in August PeachParts Mercedes-Benz Forum Mercedes (and BMW) straight sixes have a rough idle "by design"?! M103 rough idle and stalling User Name: Remember Me? Password: Register: ShopForum Gallery: FAQ: Calendar: Today's Posts: Search LinkBack: Thread Tools: Display Modes #1 05-11-2009, 06:13 PM mbzman. The symptoms are as follows: 1: High rpm at cold AND warm idle, 1000rpm is not unusual. akde ltml zfqhhc zrom gxj hcw jvlgcrq lmitp yxcz pmlnkjs vcnpm amepr spz rlvouo nurzo