If the EGR valve is leaking, it will cause a rough idle, especially when the engine is warm. As the situation becomes worse, it can also cause the vehicle to stall. balance rates are good . Common causes of blue smoke in a diesel tractor include: faulty injector pumps or lift pumps. Sounds just like symptoms of a plugged spill port injector, which is not really a issue but you need a tune written for it so they bump up ICP at idle should take care of it. Mine too idles rough only when warm. A diesel engine in good condition should produce no visible smoke from the exhaust pipe. Another possibility would be a plugged air filter (runs fine on startup then needs more air once warmed up). The odd thing is, when ever I put any load on it, it idles fine. The warmest I have had it idle and not lope so far is 165, so somewhere between 165-185 something seems to be happening. . I have been having this issue for a while and have not been able to figure it out. High idle is very low. Just recently noticed that it's also rough when I put it in park and raise rpm's so it's not just at idle. got a 2007 5.9 that is doing something similar. Then if you get on it, it revs up into second and at. Analyze The Components Remove the cluster. Nov 19, 2011. I do not believe the injectors have been done. At the 600 RPM idle I even had some problems with the engine stalling when I was slowing down to a . Example, turn on the. Check / correct injection pump timing. Save. 7. Had 7 bad. It has the EGR delete, Atlas 40 FICM, 4" exhaust, but otherwise stock. The car has travelled only 165,000 kms since new. Possibly diesel bug. it doesn't do it when engine is cold or at operating temperature. 7.3L Diesel Rough idle, feels like a bad injector but when at operating temp it runs fine . I started noticing a rough idle and discovered an issue with the valves, low compression on #8. But the idle rpm was still like 6~700 RPM! you can bring the rpms up just a tad and it seems to smooth out some. Have changed all fuel filters and water in fuel - Ford 1997 F350 Crew Cab question . 3 Comments edenerotikashop.hu on March 17, 2020 at 4:07 pm You are so cool! After I switch on high idle then turn it off it and it drops the rpms back to this 600 or so range it runs smooth. The FICM is good and has been replaced within the last month or so. For example, check your oil temperature before you start it and make sure it is reporting close to ambient temperature. I have an early 2003 150K on it. If you were running it in a dusty environment that would clog the air filter. those 2 things kinda made me think i needed to change that sensor, if at idle my injection oil pressure is too high it will cause a rough running engine. When plugged in (90% of the time) it will run a little better. Mar 19, 2014. . When it is cold it is ok, but when it warms up it is pretty bad. We remove the passenger side valve cover and replace the fuel rail pressure sensor. It also smokes alot on cold start until warmed to normal. These compounds cause it to solidify when temperatures drop down to 10-40°F (-12.2° to 4.4°C). As an Amazon Affiliate, I earn from qualifying purchases *Shop Amazon for Car Parts & Accessories -* https://amzn.to/3i7u8ZUMy. Spark plugs use the electrical current; received from ignition coils to ignite the air/fuel mixture, within the combustion chamber. Took about 30 minutes and a can of brake cleaner. Its got 164k miles. any time it is at an idle and is warmed up it has that stumble. Spark Plugs An engine that is doing a rough idle when cold can also be the result of faulty spark plugs or damaged spark plug wires. This sensor fails quite regularly and can cause Rough idle, Surging, Stalling, and Misfire. and now I think this is the first one I regret buying. As the situation becomes worse, it can also cause the vehicle to stall. TDI. Oct 21, 2010. IMOP to get a really rough idle when it's warm ( normal operative temp ) aren't the injectors ( anycase 300K km .. thought they are really to be serviced ) are air in the lines .. at least with Toyota diesel engines .. When the car has a faulty coil, it will experience a rough idle, misfire, loss of power, trouble accelerating, and poor fuel economy. put fresh diesel in then put a clear fuel filters in line between the tank and lines, the lines and pump and then the pump and return. . A plug that is damaged or installed incorrectly, can result in fuel being burned at an inconsistent rate. From other posts the cam position sensor might be worth replacing. If you are in the Meridian, ID area, call Gem State Diesel's diesel engine experts for help at 208-288-5555. A rough engine idle, can be caused by, spark plugs or wires. If you have oil in there then it is almost certain that the sensor is bad. desired and actual pressure are dead on. I have a 99 2500 5spd with the fass 150 and a scheid lightning VP pump. As it warms up it starts to get a little rough. I do note that inside the cabin the engine noise is quite pronounced if the radio/music is switched off. truck does great til it hits 180 then idles rough. It had 89K when I bought it. When the car has a faulty coil, it will experience a rough idle, misfire, loss of power, trouble accelerating, and poor fuel economy. AE shows 47 volts when cranking and 47.5 when running on the FICM. 1990 F250 7.3 IDI 265,000 I have been asking a lot of questions and you all have been very helpful. Spool coil issues would usually throw a code. Replace injectors. 6.9L IH & 7.3L IDI Diesels . 2002 2500 quad cab nv4500 4x4, fass 150, 85hp sticks, autometer gauges, quadzilla xzt+, adjustable boost elbow Check / replace fuel transfer pump. Defective Spark Plugs/Wires. Seems to happen when the coolant temperature gets between the 50 to 70 deg C range and I'm stopped at a light or just idling. In some cases, wax crystals can also form in the water/fuel separator, which can block the system. When truck is cold for the first 20 sec it runs rough and after it smooths out and once it is warm the idle goes up and down and wile going down road the tac moves up and down about 75 rpm . Over 160° and sounds good at idle but jumps/lopes around. 06 Jetta rough idle after engine is warm. 1997 f350 diesel rough idle Smooths out when accelerator is pressed. I am saying this because I have this issue lol. Cold start it hunts for idle speed, I give it a little gas for about a min and then it idle steady but rough. Some smoke at acceleration from idle but none accelerating at higher rpms. Thread . I did just swap positions on my injectors 7 & 5 last Saturday, but did not have this start happening till the last couple of days. 2000 Jetta TDI. Completely smooth idle and acceleration. Been on and off since then and at this rate I thought it was normal. 2,021. Always look at your operator's manual to see the exact specification for your engine. One of my chip positions has a 600 RPM idle and it was much more noticeably rough idling than the rest of the positons which have a 750 RPM idle. Here is the repair for your 2008-2010 6.4 Powerstroke with a rough idle. Builds nice boost just awesome truck. Idle is slightly better warm but still shakes the truck. my balance rates are surprisingly pretty good, only one over 3 in park and it barely gets over 3. I'm having the same issue on my W107 450SL. A leaking EGR might not affect cold idle because the fuel mixture is rich and the RPMs are high. 5. I have brand new 15%over industrial injectors, new fpr, egr delete, pcv reroute, efi live, took off and it made no difference so now its back on, I get a rought idle or truck bucks only in park and neutral when warm not when cold at all. it has methanol in it. (I am assuming that, since the light popped right back on after about 20 miles) As an interesting side-note, it idles perfectly until the engine is *almost* fully warmed up, and then it starts idling rough. At engine startup I see a rough idle. 0. It sounds fine when you rev it up and is only running rough between 950-1500 or so id say. Rough Idle, Warm Engine. changed, fpr, complete fuel filter & housing, new map sensor, EGR delete ( along with studs & grade c's. I've went over every stitch of wiring and cleaned every sensor. I have a 1999 Saturn SL1. lines to pump rubber. It just sounds weird at idle with that stumble other than that it runs fine down the road. Do diesel engines need to warm up? I reconnected everything, bled it out and got it running, but somethings strange. 2. Now, let's fix the issue when engine runs rough after warm up in sequence and later troubleshoot the actual cause of it. Modern diesel engines do not require the amount of time to warm up as in years past. fresh oil and filter, t6 oil. Do diesel engines need to warm up? ! Bring your vehicle to a trusted mechanic near you for a complete diagnosis. Could be pure coincidence, but it sure coincided. gonna take a few months to get done but will update the post when fixed. A valve adjustment (on engines up to 1885) followed by a compression test must be done first. 7. Hi Picked up my brand new f56 cooper LCI yesterday, my 3rd F56 cooper. cheers. Pensacola "new" bbs ran so s***y at a warm idle for me, but anything other then warm idle it was good . #1. Hello all, My '82 GMC 6.2 just blew a lift pump and I replaced it. rough idle in park I have an 04.5 lly rough idle in park and neutral only when warm. This is a common misconception. Just got this car a week ago. It has a rough idle when warm, starts around 165deg. any time it is at an idle and is warmed up it has that stumble. Bleed the fuel system and check for suction leaks. When I first start the truck it idles nice and smooth, could a fuel pressure reg. Last spring I started getting a slight rough idle after remote start for a couple minutes then shifting to drive. Maybe got some water in the diesel. You can have ALL these problems and the diesel engine will run, but it will become extremely ornery. Most manufacturers recommend idles for 3 minutes before running the engine under a load. It cold starts excellent. I HIGHLY RECOMMEND AGAINST USING ISO HEET. Spark plugs use the electrical current produced from the ignition coils to ignite the correct ratio of the air to fuel mixture within the combustion chamber in the engine. Mar 7, 2010 #7. I've checked everything and still not a clue.I've seen some videos where. Collect Fault Component Data Firstly, if your car has an installed universal scanner jack, fasten the code scanner and collect the information from the damaged components of the system. If the compression is weak or highly imbalanced you will not be able to solve the rough running problem short of an engine overhaul. Replace engine mounts. My truck is all warmed up and runs fine except at idle, especially while in drive sitting at a light idleing there is a small sputter like I'm not getting enough fuel. It almost sounds like it has a lope in the idle. I bought it becasue of its low mileage. It has not actually stalled, there is no smoke at warm idle. Feb 9, 2010. If this is the case, you will typically observe rough startups, with everything smoothing out after approximately 30 seconds. After resetting the codes, it still idles a little rough (roughness goes away under any sort of load again) and the P0401 code is back. Reaction score. Location. It does have to warm up for a few minutes or it has very little throttle response. It runs fine on startup, but the first time you move it, is starts to surge at stoplights. Dear Friends, my wonderful Mercedes c250d turbo diesel (1997 build) idles rough when warm and when in neutral or park. I have a 2018 diesel canyon with 38k now. I would compare it to an engine that is started without being choked enough, yet still starts. The idle is rough until the water temperature reaches 60 degrees or a . The truck did this with the old motor also. Driving sounds like a old 12 valve or something. The truck is a 5 speed. The truck is a 5 speed. Check / adjust low idle screw setting. Re: Rough idle when cold. If weather would warm/clear up for a day or 2 id play around with mine. I have changed the fuel filters as they needed it. Regards, 2002 2500 quad cab nv4500 4x4, fass 150, 85hp sticks, autometer gauges, quadzilla xzt+, adjustable boost elbow Tomo . If you're not throwing any codes and mechanically everything seems in order, you might try running some Hot Shots Diesel additive in there to clean out your fuel system and maybe some ISO HEET as well and see if that helps. Reactions: 35kl199. Aug 22, 2013 One thing you could do with AE is run through and check all your sensors - make sure they are operational. After that it still runs rough but, not as bad. so I am just trying to find other causes. Got a little issue id like to diagnose. Hi, having trouble with my 5.9 cummins"2005" idle is a little rough..doesnt move the rpm tach alot..maybe a 100-200 but you can certainly hear it through the sound of exhaust. I bought the truck from a diesel mechanic and he said that when he swapped back to stock VP the miss went away. i have a 2005 3500 dually, when i start it up if its been sitting for awhile it runs extremely rough until it warms up then runs fine. For what it's worth, my engine always had a lopey idle-- then in early December I had a sudden instance of fuel gelling, and to deal with that, put about 5 gallons of kerosene in the tank, along with a bottle of Diesel-911. The car starts right up but idles very rough, shaking and knocking. A surefire way to tell if your ICP is faulty is to pull the plug and check for oil contamination in the pigtail connector. 1. Only show this user. . Mar 27, 2012. Only show this user. The truck will stall if it doesn't warm up for at least 5-10 minutes. Only show this user. The car has a stumble and will "clear up" once giving the car more throttle. Sarasota-Bradenton, Florida. Truck is completely smooth answer quite. Current Truck-07 F350 6.0L Diesel 4x4 172"WB Past - 99.5 F250 172", 2003 F350 7.3 172", 2004 172" Save Share. ipr is about 30% at idle. My truck after it has warmed up has a real bad idle. When i saw mine had the update and wires checked out i decided to go ahead and buy the $200 sensor and change it. Wtf! This is a common misconception. Sounds more like contaminated fuel. The other thing is after you rev it and it goes to idle arournd 950 thats where it is running rough. 1997 Ford F350 with a 7.3 powerstroke rough idle jumping idle how to fix Diesel Engine - Rough Idle - Jump to Latest Follow 1 - 19 of 19 Posts. more common on dam days. Yes. I am using an NGS with the red VCM to check PIDS. i love the car, but have noticed that it seems to have a slightly rough idle you can feel. Mar 2, 2019. I have a 1997 Ford F250 power stroke with 2000 miles on the engine and when it is cold it runs and purrs like a kitten but when the engine is at operating temperature it feels like there is a misfire at idle. Blue will get ya raw fuel and retarded timing which could give you a rough idle especially if the injectors are popping off at different pressures. Mercedes Rough Idle & Shaking. Decided to do a valve job. May 18, 2011. I've been dealing with a rough stumbling engine during the warm up for a while now. Im having the same symptoms. Low idle sounds normal and no smoke. Sep 9, 2011 #13 L. One of the main causes of the rough idle when cold is a faulty ECT sensor. I've got a good lift pump on and 100hp injectors. Right after a cold start the engine runs OK with no apparent problems or roughness. have checked most of the basics. Today my D's engine seems to run rougher than normal (noisier) 'cos it -14C here in Toronto with wind chill more like -20C. 2005 Duramax Rough Idle. Diesel engines do not need 5 minutes of idle time in the morning. 2006 Jetta Gunmetal Blue 5spd. Give it a try. The motor is stock. I'm having an issue with a rough idle. When idling warm it is very rough, periodic vibration that feels like it is stalling. Jun 10, 2010. Now it is at 96K and the engine idles rough. Yes. 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