Mercedes 300d rough idle. Hello everyone, Long time lurker here.

Mercedes 300d rough idle. I've got a 1983 300D mercedes with approximately 230k on it that has an idling/smoking problem (smoking is a bad habit). 5 is providing an intermittent rough idlehere is the detail of symptom. 32K miles (yes, that's not a mistype) The symptom is a hot rough shaking idle which becomes smooth as soon as RPMs get >1K. Compression, have you checked the compression. Also, new rack damper bolt installed. Easiest to replace the 2 sections of Fuel Hose with 5/16 ID Fuel Hose from the local parts Store. Yesterday I determined that it was idling at about 650-700 rpm (according to the dash tach) and I adjusted the idle speed up to 750-800 rpm using the idle speed adjustment screw on the backside of the injector 300D: diesel. This is one of the most common causes for an idle vibration and often will come hand-in-hand with a perceived loss of power driving around town at low speeds. 20-30 second glow time along with light depression of accelerator pedal helps to mask the problem. Oil consumption is normal. When first driving in the morning the car after warming up seems ok. It's got a really rough idle. Posts: 31. When I first bought it had a very rough idle then I replaced all the injectors and delivery valve, valve adjustment, verified timing and the miss is better but still there some what. Apr 19, 2021 · Mine also does this something. Fuel consumption normal. Oct 27, 2014 · Air leaks into the Fuel Inlet will cause rough Idle. 1982 300D Rough Idle / Misfire on cold start. Sep 27, 2007 · 300D rough idle issues My story with this begins about 3 weekends ago, when I replaced the primer pump, as the original was leaking fuel when used. Then today it seems to idle rough in stop and go traffic at a May 17, 2021 · Car is a 1984 US 300D. I've owned my 1984 300D for about 2 months now, and its had an off and on rough idle/reduced power. My 1991 300D 2. The engine idles in a much more subtle manner, closer to how I imagine the car was originally designed to perform. 5 turbo diesel engine, and it has roughly 240,000 miles. No or little change in idle when line bled. After a short drive it runs fine even at idle. 1985 300 turbo diesel rough idle. New motor mounts, engine shocks, and a rack damper screw have resulted in this change. Jan 31, 2014 · My TD's rough idle makes it tiring to drive. Car fires right up cold but seems to idle on 4 cylinders and smokes a bit like a mosquito fogger until she warms up a bit. Cold idle is smooth. 3. Sep 5, 2011 · The rough idle issue has finally been resolved. While not always the case, a failure from one of those parts can cause an idle vibration. At the first stop sign I wait and it idles very rough like it's misfiring. It's a 78 300D 94,000 miles. Oct 10, 2023 · Step 1: Grab a Scanner. check the Plastic Filter for cracks. Fuel spill normal when line open! Injectors OK. And, there was a "stutter" around 1500-2000 rpm; this was fixed with injector pump rebuild/recalibration (see below). When I start it in the morning, it idles fine for 30 seconds or so. . So far, I've cleaned the fuel tank, replaced the strainer in the fuel tank, new Jan 25, 2015 · 2. Apr 30, 2012 · Hello. Elevating the idle from the usual ~750 rpm up to ~900 rpm smooths it out but I can't set the idle there or the transmission slams into gear. Hello everyone, Long time lurker here. It has a few issues and I hope to learn more about this car and what's wrong with it. Car seems to be very well maintained according to records and has had valves adjusted within the last 10K. Then today it seems to idle rough in stop and go traffic at a . Apr 19, 2021 · It's a 78 300D 94,000 miles. Anyway, in the process, I guess I didn't get a hoseclamp tight enough and started a little stalling problem and after some tightening and air purging, I'm not seeing any bubbles in the prefilter Nov 26, 2001 · Engine misses on one or more cylinders at idle, runs much better above 1500 rpm. Apr 8, 2022 · The lingering problem has been a rough idle with lots of smoke and diesel fumes at startup, and after about a minute when idling warm. Anyway, in the process, I guess I didn't get a hoseclamp tight enough and started a little stalling problem and after some tightening and air purging, I'm not seeing any bubbles in the prefilter Oct 13, 2017 · Posts: 6. I am familiar with mechanical diesel, but this car is making me scratch my head a bit. Also while accelerating I can here and feel a slight miss. May 17, 2021 · Car is a 1984 US 300D. May 2, 2021 · 1984 300D- Rough Idle. Ever since then the car has been idling alot harder Jan 5, 2017 · Well, I have a 300D with the 2. car comes to an idle it runs rough and vibrate Mercedes Mechanic: JustinA0506 This would indicate that there is likely an issue with the valves sealing after the engine heats up. It is rated for Diesel Fuel. Oct 10, 2023 · As the engine pulls in a tiny bit of air from the potential tear or poorly seated filter housing, the engine won’t be able to compensate for it and develop a rough idle. 1) Just before coming to a complete stop ( on braking gently) there is a discernible vibration which feels like a cylinder miss. Been reading and reading since I acquired my new to me 300D and have been coming short on this issue. Hello everyone, I am new to the Mercedes diesel world. Hi--. Rough idle, lots of smoke 300D. It's not an outright misfire but a weak cylinder. Oct 1, 2013 · Quote: Originally Posted by Danman. The later models have a rack damper bolt that if mis-adjusted can cause hard starts. When an intermittent or constant vibration is present, owners often jump to a tune-up, grabbing ignition coils, wires, and spark plugs, however applicable to their engine. Usually worse warm. What year is you're 123. After 30 seconds, it starts smoking and shaking. It also seems to run a little rough in the lower rpm ranges but this can only be noticed when running the engine up from idle in park. 2) at a complete stop in drive the car will vibrate which also feels like a miss however if while holding the brake I Mar 14, 2007 · Posts: 20. Other info: Some smoke (white) at startup but not excessive. May 2, 2021 · Hello everyone, I am new to the Mercedes diesel world. Cracking the line on the #1 injector would smooth out the Aug 26, 2022 · Location: Central, IL. I normally run the car on B100 homebrew, but have been lazy lately and been running it on straight dino for about the last 2 tanks. My 84 300D starts easily, no matter the glow time, but idles rough and feels like it "misses" for 10 seconds or so. VERY rough idle -- shakes car hard. Nov 29, 2010 · My recently aquired 1984 300D with 175K has somewhat of an idle shake. It idles well when cold and warming up but chugs and rocks the car once warm. So here I go with another question. Hard knock on affected cylinder, goes away when line bled. Rack Damper bolt needs adjusting. Cold starts are rough idle are signs of low and uneven compression. ymnqqr yevhdze ijf fgzpuv pth sjyn ofh ttyuf xts ymzfj