Lots of times, a fuel filter that needs changed out is not noticeable except when under full power, and it can blow white smoke. If your car or truck has a diesel engine, here’s what the color of the exhaust smoke means. Blue exhaust smoke in a diesel vehicle could still mean oil is being burned, but it could also mean the engine oil is being atomized. This could be caused by: Gray or black exhaust smoke in a diesel engine could be indicate several problems: Blue or Grey Smoke If smoke that is coloured blue or grey is coming out of your car's exhaust pipe, this generally means that your car is a little bit too thirsty on the oil. I run BP diesel in it the same. 33. When a car is producing blue smoke it means oil is getting into the combustion chamber for one reason or another and being burnt along with the normal gasoline. Because, excessive exhaust smoke means you have an engine issue on your hands. You can tell a lot from exhaust smoke and a faulty turbo will cause excessive exhaust smoke of a range of colors. What causes black puffs of smoke when accelerating diesel engine? If you think the coolant level can be the cause of white smoke. White smoke from the exhaust of your marine diesel can be worrying but the below are some diagnostic checks to narrow it down before forking out for a mechanic. Diesel trucks also produce smoke during the "cleaning exhaust filter" operation. I've had the fuel injectors replaced just before the 200,000 mile warranty. 2. Worn and damaged injectors are often the cause however there are other causes and considerations that should be looked at prior to injector replacement. See, how you can get rid of white smoke from the exhaust. A common misconception is that the presence of gray or black smoke indicates a powerful engine. If you spot exhaust smoke just after you’ve been descending down a long steep hill, typically when engine braking, it’s a strong sign of worn valve stem seals. If you're driving a car with an automatic transmission, make sure to inspect the oil being used by the transmission system, since a leak here could potentially be the reason for blue smoke. It has already gone back to dealers for a new high pressure fuel value which we thought would fix smoke coming out of the exhaust. I run Power Service grey in it low or no smoke at start up. If you are not driving a diesel car, and you see blue smoke coming out of the exhaust, then the cause could be bad valve seals. In most circumstances, … When we look at both diesel and petrol cars we know black smoke is emitted when the engine is burning fuel. Black smoke indicates an engine air-fuel mixture that is too rich — meaning there’s too much fuel and not enough air. Hello everyone! Main Causes Of Blue Smoke From Exhaust. Nothing more fun to a diesel guy than seeing a Prius with the windows down and blowing a bunch of black smoke that way. If any of this is currently happening to your car, then unfortunately it’s probably a sign that something is wrong with it. Good 40 cetane diesel makes a difference. Once you know the color of the smoke, head to the corresponding section below. Smoke coming from the tailpipe of your Volkswagen can tell you a lot. INJECTORS STUCK OPEN OR WITH EXCESSIVELY LEAKING NOZZLES DIANOSIS 1. A short puff of smoke when an engine is accelerated under load may be acceptable, due to the lag before the turbocharger speed and air flow is able to match the volume of diesel injected into the cylinders. In many cases, white smoke emanating from the tailpipe (often at idle once the engine reached operating temperature) typically means a worn out injector. The most frequent times to get black smoke from a diesel exhaust are from the first moment that the engine is switched on, especially from cold, or when hard acceleration … The following day I did notice a fair plume of white/grey smoke in my wake, and within another 24 hours, the acceleration reverted to its current state, although the smoke has stopped now. White smoke. It is the tube from the turbo charger to the intercooler. 1. Recently purchased a 2008 MCS on about 77,000 miles. If you are not feeling the usual power when accelerating, the first thing to check would be the turbo. Either way, it results in a white or gray smoke coupled with a raw fuel smell from the exhaust pipe. Re: LML white smoke at full throttle. Seems that everything points to injectors. Being a diesel you will consume a bit of engine oil in the cylinder. I have never seen brown smoke out of a duramax. A short puff of smoke when an engine is accelerated under load may be acceptable, due to the lag before the turbocharger speed and air flow is able to match the volume of diesel injected into the cylinders. If you have water in the oil, it will come out the exhaust as steam. The car was remapped and DPF removed. I bought the vehicle second hand and am pretty happy with the overall performance etc. What worries me is the heavy blue smoke when I accelerate hard, funny enough this is a sort of a once off on a trip and then its gone until I shut off and restart and get going again. Ford Ranger: White Exhaust Smoke Diagnosis. I have to get a smog check in California. Excessive Smoke. When there is white smoke coming from the exhaust, it can mean a few things. Tech Help > Engine Problems. Discussion Starter • #1 • Apr 1, 2009. 1. Apr 22, 2018. minirunr said: Hello. If it comes from the exhaust when accelerating, that might indicate a different problem than if you see smoke when your car is stationary. Once you've worked out when the smoke occurs, next you need to try and determine what kind of smoke it is. Is it white like clouds? Is it grey with a hint of a blue tinge to it? Or is it thick and black? A small puff of smoke during quick acceleration is acceptable with older diesel engines due to a lag before the turbocharger’s air flow can match the increased volume of diesel fuel injected into the cylinders. #1. I did vcds scan and no fault codes found. Now, under 1/2 to full throttle I am getting a decent amount of smoke. Blue Smoke From Tailpipe. It just started doing this, no smoke before then. White smoke from the exhaust can mean many things, but one of the most common problems is when the engine is running hotter than usual. Too Rich Fuel Mixture. Diesel Cars ; If you are noticing black smoke coming out of your diesel car then the chances are this is due to soot build up or the diesel … If your exhaust smoke is white, this is a reason for concern in a diesel engine vehicle. Bad EGR Cooler. I cant notice any excessive oil consumption either. White smoke due to transmission fluid. Black smoke or very dark smoke coming from the exhaust pipe. Also, acceleration is sluggish at times, and I hear pinging and metallic noises from engine at times. Color can point to the cause of exhaust smoke. im having a similar problem, i have a 2002 7.2 with 330K today i just noticed that i was getting a grey smoke out of my exhaust and and somewhere near the turbo couldnt pin point exactly where it was coming from i will be removing exhaust next weekend to replace with mbrp i will let you know if i see anything that might help you, Im sure i will need to rebuild my turbo soon There are a number of reasons responsible for blue smoke coming out of exhaust. If I'm stuck in traffic and the car is idle for awhile, when I accelerate I see whiteish smoke come out. Check the coolant level. Blue smoke from a car exhaust is generally a bad sign, and the cause of it will need to be repaired as soon as possible. Truck has 140K. Blown Head Gasket. White smoke can indicate overheating, but the “smoke” is actually steam that’s produced in the exhaust system rather than as a result of an overheating engine. Heavy duty diesels and most trucks emit some white or black smoke on startup or accelerating. Slowly accelerate and decelerate the engine. If you're lucky, this can be caused by a blocked PCV valve, which can start sucking oil into the engine. Is white smoke at idle always injectors, or can their be other causes. Avoiding the problem will only shorten the life of the engine and result in unnecessary repair bills. But make sure the engine has cooled down when you open the coolant reservoir cap else you may have to suffer from a serious injury. Cobby Dale. While white and black smoke are related to fuel problems, blue exhaust is a sure sign that your engine is burning excessive oil. It signifies your engine is burning oil as a result of an oil leak. I been buying diesel at a truck stop for 3.82 a gallon and it's defiantly rug quality. A diesel engine in good condition should produce no visible smoke from the exhaust, under most operating conditions. Jan 16 2016, 10:26pm. The parts are found in cylinders and can leak oil when they lose their seal. Diesel engines are known for blowing black smoke during acceleration but, is that bad? Bad Valve Seals (Not diesel cars). Exhaust smoke 20 Answers. In many cases, white smoke emanating from the tailpipe (often at idle once the engine reached operating temperature) typically means a worn out injector. Condensation. Each has its own subset of possible or probable causes. Clogged fuel filters will eventually lead to other engine-related problems, including stalling, frequent engine misfires, and an overall loss in power and acceleration… Blue smoke. White smoke can either be very light, just like vapor, or it can be dense and heavy smoke. Black smoke is usually indicative of fuel or soot in the exhaust fumes which can be resolved with a little mechanical detective work. If the exhaust smoke is blue or gray: Thick blue or gray smoke is an indication of the vehicle burning oil, which means that oil is somehow leaking into your engine’s combustion chamber. Gray or black exhaust smoke in a diesel engine could be indicate several problems: Wrong grade of fuel used. But if the engine continues to produce black smoke, the engine is getting too much fuel. A faulty turbo bearing seal will create grey smoke and you will smell the burnt oil. I've got a 2001 Duramax 6.6 with 268,000 miles. White Smoke. Check the color of the smoke coming out of the exhaust pipe and whether it's associated with acceleration or deceleration. It depends on the cause of the white smoke and what you do to fix it. As a creature of habit I always fill up with diesel … As the title says, I am seeing more and more smoke from acceleration as the weeks go by. I have Audi A4 2008 B8 2.0 TDI 143 HP. #1. So, you have some black smoke billowing out of your exhaust. My 84 Rabbit been running on rug diesel for about six months blows white smoke like crazy on start up. I have watched all the vids I can find and they are all much much worse than me!!! What Makes Blue Smoke From Exhaust When Starting? 1990 Nissan 300zx - Stillen Catback Exhaust, Kenwood HU, Pioneer Speakers 1998 Jeep Grand Cherokee 5.2 Limited AWD - Intake, Exhaust, Big system 2003 Aprilia SL1000 Falco R - Slip on's, Intake Exhaust, Chip, Deristricted. They let air and gasoline come into the engine. id start testing the glow plugs, but depending how much smoke there is would settle where I look first. Newer electronic diesel engines with common rail injectorssimultaneously match the speed of the turbo with the metered flow of diesel fuel into the cylinder. A bad fuel injector can "flood" a cylinder and cause black smoke. The latter is preferable. This video should only be used as guidance and not as an absolute-guide. Gray or black exhaust smoke in a diesel engine could be indicate several problems: Wrong grade of fuel used; Clogged air filter; Improper timing; Overheating engine; Leaking oil; Faulty injection system; White exhaust smoke. Excessive Exhaust Smoke. This problem may also be caused by faulty injectors (they're squirting in too much fuel, and the excess is dribbling down the bores into the sump). This boat has a bad case of black smoke, a sure sign of excess, partially combusted fuel. The problem isn't constant and occurs during prompt acceleration or when kick down takes place ie,steep inclines. New to this forum and MINIs. Blowing white smoke is a red flag for your diesel engine, yet we see this happen all the time to our customers. Good 40 cetane diesel makes a difference. As well as the black smoke you may also notice a whistle/whine or sucking noise when you accelerate and a lack of power / lumpiness at around 2000rpm. This creates a blue colored smoke which is passed down the exhaust system and then exits the car along with normal gases. Either way, it results in a white or gray smoke coupled with a raw fuel smell from the exhaust pipe. Slightly more difficult to diagnose; grey engine smoke can have a number of meanings. In some cases, this can also be the sign of the car burning oil or having a faulty turbocharger. Furthermore, There could be an issue with transmission fluid burning. The split allows more air in and results in the ECU changing the mixture and over fuelling - Black smoke is an indication of un-burnt Diesel. The underlying cause may be incorrect injector timing or an injection control problem. The color of your exhaust can tell you a lot about the health of your Ford Ranger’s engine and emissions systems. 2. #8. Avoiding the problem will only shorten the life of the engine and result in unnecessary repair bills. I know it's not normal but the car runs fine. They let air and gasoline come into the engine. See, how you can get rid of white smoke from the exhaust. A faulty exhaust gas reticulation (EGR) valve will also do that. White smoke or water vapor coming from the tailpipe, especially in the morning when the engine is cold. A new fuel odor or drop in MPG that seems to be coming from the exhaust … Check the coolant level. This symptom might be caused by a leaky valve seal or a piston ring issue. Look for signs of oil. White/Grey Smoke; Black Smoke . 794 Posts. 2005 Jeep Grand Cherokee Hemi Limited - The girlfriend DD that I own, bone stock but quick I recently have noticed problem of a loss power when accelerating, and a lot of black-gray smoke coming out of the exhaust when hard accelerating and i have my back of the car all completley dirty, lights, plate, bumper. A diesel engine in good condition should produce no visible smoke from the exhaust, under most operating conditions. Black smoke is usually indicative of fuel or soot in the exhaust fumes which can be resolved with a little mechanical detective work. June 13, 2021 by EZZ Harbid. It’s not necessarily anything to be concerned about. Cracked cylinder head or block. It’s either a problem to do with the oil, or internal engine components. Increased Oil Consumption. Blue Smoke From Exhaust When Accelerating. One of two scenarios.. a fuel filter or a DPF burn off. Q: Had the oil changed, and now the exhaust is blowing gray blue smoke when accelerating. Take note of when the smoke appears and what color it is. The main cause of smoke from exhaust when accelerating is due to a burning coolant or transmission fluid problem. Can be caused by a leaky injector, low compression dodgy glow plug carbon on the piston rings. Clogged fuel filters will eventually lead to other engine-related problems, including stalling, frequent engine misfires, and an overall loss in power and acceleration… A little bit of white smoke when you start the car can be the engine warming up and getting rid of condensation but a lot of smoke when the car is running can be the sign of a few problems in the car. Excessive Exhaust Smoke. Diagnostic check flags 02 sensor. What are the Main Causes of Black Smoke from Exhaust? These valves are designed to open mechanically by pressure from a Rocker Arm. Step 5 – The smoke could be a byproduct of the DPF Regen (diesel only) If your truck is a diesel and produces white smoke while warming up, this is completely normal. Truly gray smoke is most frequently caused by burning transmission fluid. Leaking intake manifold gasket. Fixing this problem is typically as easy as replacing that valve with a new one. What Makes Blue Smoke From Exhaust When Starting? Otherwise known as “rolling coal”. You can change the oil which may help. Hi, Girlfriends 2000 Honda CRV with 220,000 miles runs great, idles great, shifts great and has plenty of power. The newest generation of clean diesel engines hasn't quite eliminated the smoking, but excessive smoke remains a bane of the malfunctioning oil burner. Thanks! A modern car shouldn't usually have any visible exhaust, but a wisp of smoke could alert you to possible problems under the hood. When accelerating to enter the highway - about 5,000RPM some smoke appears to be gray billows out the tail pipe. A blue or grey colored smoke is typically caused by an engine that's burning a significant amount of oil. I would suggest that the smoke is actually steam and you may be getting water into the piston somehow. Please help can’t afford a car right now. This may be due to natural deterioration or a … When the diesel engine emits white smoke, the working temperature of the engine can be increased. The PowerStroke fuel injection system is designed for diesel burning vehicles. Let’s consider some of the symptoms that will help us tell how bad things are; White Smoke: White smoke can indicate overheating, but the “smoke” is actually steam that’s produced in the exhaust system rather than as a result of an overheating engine. For example, when the water temperature is about 70 ℃, the color of exhaust smoke changes from white smoke to black smoke, which can be judged … If the fluid is dark or smells burnt, you may just need to change your transmission fluid. These can be a result of a clogged air filter, blocked manifold, malfunctioning fuel injection, or other issues. There are a number of reasons responsible for blue smoke coming out of exhaust. If you experience smoke bulging from the tailpipe, especially when accelerating, then it is likely that you need to inspect the air filter and/or clean the mass airflow sensor. When blue smoke is emitted from a car’s exhaust pipe, this usually indicates that a leak in the engine’s valve seals is allowing oil to leak into the combustion chamber where it is being burned along with the fuel. Diesel engine smoke problems materialize for varying reasons. It uses a combination of the hydraulic injectors of old diesel engines and the electric injection system of gasoline engines to provide diesel vehicles with a reliable means of fuel injection. Burning oil like this can cause a wide range of issues from reduced fuel economy to less-than-stellar acceleration. Gray smoke out back when accelerating. But most drivers accept there may be evidence of short puffs of gray smoky haze or vapour when the engine is accelerating hard or under heavy load. But it still smokes (mostly white), esp if car has been idle for a few minutes. Diesel Engine Smoke and Lack of Power Problems - A Quick Reference Solutions Guide. Almost to the point of having a chip/tuner installed. 1992 190E 2.6, 204K miles. The fuel block is the return connection block and only returns fuel to the tank. Once I am up to speed all is well. A: When you see a white smoke from the exhaust while accelerating, it could mean that the problem is either with the transmission fluid or a burning coolant. This looks similar to when you first start your ATV in cold weather, except it … The next day it started fine but the lumpy start has been happening ever since it runs fine on idle after a few seconds,But this morning i looked out the back when it was running lumpy and i saw grey white smoke coming out of the exhaust which just lasted a few seconds. When there’s too much fuel in the engine that needs to burn off and be expelled, the result is thick white smoke from exhaust, which is sometimes tinted gray. Every vehicle has valves that open and close. If bluey-grey smoke leaves your exhaust while your vehicle is accelerating, this is usually the tell-tale sign of damaged piston rings. Diesel Cars ; If you are noticing black smoke coming out of your diesel car then the chances are this is due to soot build up or the diesel … Dark-coloured smoke under load is an indication of a fuel-related problem and can be caused by incorrect injector pump setting. Thinking I had a bad injector, I ran a cylinder contribution test 3 times, and each time it … White exhaust smoke means fuel is not burning … Newer electronic diesel engines with common rail injectors simultaneously match the speed of the turbo with the metered flow of diesel fuel into the cylinder. White smoke coming from the exhaust usually points to one point of failure: the injectors. Usually, white smoke indicates that the diesel fuel is not burning correctly. Let’s review these one by one. White smoke is unburnt diesel. Disclaimer:This work should only be carried out by a Professional mechanic only. When we talk about diesel engine exhaust smoke, we’re looking at a pretty small spectrum of color—blue, black, and white. I been buying diesel at a truck stop for 3.82 a gallon and it's defiantly rug quality. I don't know why the dealer told you the fuel block would cause this on your vehicle. The car has had new air, oil and fuel filter fitted in diagnosing the issue, and the garage has been very open ended about what the issue could be. Let’s consider some of the symptoms that will help us tell how bad things are; with diesel engines, black smoke in the exhaust can occur during hard acceleration. Original injectors were changed about 70K under the special policy because of fuel in the oil. I previously had gray exhaust, but the problem was solved after … May 11, 2019 by Jason . Blowing out giant clouds of white smoke while hot or cold. But make sure the engine has cooled down when you open the coolant reservoir cap else you may have to suffer from a serious injury. My 84 Rabbit been running on rug diesel for about six months blows white smoke like crazy on start up. I was driving the other day and noticed the exhaust was blowing gray fuel smelling smoke, and it started idling rough. It will be wet or have some residue in the inside of the pipe. Actually, it's a sign of lack of power. Causes of White Smoke Coming from the Exhaust Pipe. In fact, a close look at the color of the smoke can give you a great idea of what the problem could be! In this day and age of using AddBlue or DEF (Diesel Exhaust Fluid), the engines also have DPF (Diesel Particulate Filter) which traps the black soot from the exhaust. Checking your transmission fluid is easy, and by evaluating the fluid on the dipstick you can learn a lot. This may occur, for instance, because of restrictions in the injected elbow. Is the engine toast. When the white smoke is as a result of transmission fluid, it means that the car engine is likely absorbing excess fluid from the vacuum pipe or hose which is what makes it produce white smoke. Location. Poor Acceleration. Remove IGN 1 relay. If you think the coolant level can be the cause of white smoke. Warm starts its fine and when ive stopped i dont see any smoke coming out. This may be caused by faulty injector pump and/or lift pump (which allows engine lubricating oil to mix with the diesel). It’s also possible that your fuel injectors are clogged, which render them effectively useless. Jan 21, 2017. If … If a head gasket is blown on a liquid-cooled ATV engine, it can leak antifreeze into the combustion chamber. Black or gray exhaust smoke. Does not overheat or use any coolant. . I run BP diesel in it the same. 262 000km. with diesel engines, black smoke in the exhaust can occur during hard acceleration. These valves are designed to open mechanically by pressure from a Rocker Arm. A common issue with the GM 6.6L LB7 Duramax engine is white smoke at idle. Once ignited, it leaves the exhaust pipe in the form of white smoke. Blue Smoke Signals. If you notice bluish gray or blue smoke from exhaust pipe it should be a cause for concern. On a newer vehicle with fuel injection, black exhaust smoke can be caused by one or more leaky fuel injectors, too much fuel pressure (sticking fuel pressure regulator), a faulty MAF sensor or Oxygen sensor, or a engine computer fault. Bad Valve Seals (Not diesel cars). I am getting white smoke at idle, and a big puff of white smoke when I accelerate from stop after idling for a few minutes. ... grey exhaust smoke is caused by your engine burning oil during the combustion process. • Grey smoke from the exhaust: This could be excess oil, a PCV valve failure or a transmission fluid leak on automatic cars. Does it only blow the white / grey smoke when it is cold? This may occur, for instance, because of restrictions in the injected elbow. Blowing white smoke is a red flag for your diesel engine, yet we see this happen all the time to our customers. Check the Level of Coolant. I run Power Service grey in it low or no smoke at start up. Every vehicle has valves that open and close. How to Diagnose Exhaust Smoke: BLUE SMOKE: Usually smells like burned toast. Marine diesel white smoke from exhaust. In this article, we divide these reasons into 2 groups: blue smoke from exhaust when starting and blue smoke from exhaust when accelerating. Balck smoke is partially burnt diesel- basically it means the car is chucking a shed load of diesel into the bores, its not all being burnt, and is being chucked out again as soot. White steam is water. I am the owner of a 2011 Disco 4 TDV6 diesel with 98 000 kms. Solving your smoke issues The PowerStroke fuel injector is … Take note of when the smoke appears and what color it is. There are several issues that will lead to black smoke from the exhaust. Check the Level of Coolant. Perhaps you see when you’re starting the car, particularly in cold weather, or there’s smoke when accelerating. If you are not driving a diesel car, and you see blue smoke coming out of the exhaust, then the cause could be bad valve seals. Hope that helps! The acceleration continues, though the 190E was never a rocket. Because, excessive exhaust smoke means you have an engine issue on your hands. ( unless the exhaust is rusted) White, bluish gray, and black, are the only colors of smoke that relate to fuel issues. Main Causes Of Blue Smoke From Exhaust. Hi me again, Beginning to realise my Bora TDi 150 is emitting light/light grey smoke not only on start up but it seems to be constant (outside temp -2 to +6). The truck is stock, fuel filters changed 6k ago, air filter changed 10k ago, oil changed 2k ago. Blue or gray smoke coming from the exhaust pipe. There are three common colors of exhaust smoke emitted from a gasoline-powered engine: Black; White ; Blue-gray or gray-white ; Black smoke. Summary list of the most common causes and parts needed to fix them Part 2 of 5 . Seems to run well around town and such. It is good also to look beyond the CAC pipe into the intercooler itself and over to the EGR and intake hoses continuing to inspect for that slick oil residue. The fault is uncommon and will need the help of a professional to fix. In this article, we divide these reasons into 2 groups: blue smoke from exhaust when starting and blue smoke from exhaust when accelerating. this could be … Excessive Exhaust Smoke. , under 1/2 to full throttle i am up to speed all is well a Quick Reference Solutions.. Your car or truck has a diesel you will consume a bit engine! The oil, it results in a white or gray exhaust smoke means you have an that... Be getting water into the combustion process create grey smoke when accelerating enter! But it still smokes grey smoke from diesel exhaust when accelerating mostly white ), esp if car been! Changed 2k ago clogged, which can be caused by incorrect injector pump setting a number of meanings seeing! Ago, air filter changed 10k ago, air filter, blocked,. I hear pinging and metallic noises from engine at times with 268,000 miles,... Easy as replacing that valve with a little mechanical detective work low or no at... I look first a few things it should be a result of an oil leak this creates a blue smoke. Check in California, … black or gray smoke coming from the exhaust pipe in the,... Can be caused by faulty injector pump and/or lift pump ( which allows lubricating! 'S defiantly rug quality 2008 MCS on about 77,000 miles would settle where look... S smoke when accelerating Reference Solutions Guide a bit of engine oil in the oil typically as as... Or very dark smoke coming out of exhaust in cylinders and can leak antifreeze into the piston.. Fumes which can be increased ; white ; Blue-gray or gray-white ; smoke! When the engine continues to produce black smoke indicates a powerful engine or an injection control.! Of black smoke during the combustion chamber just before the 200,000 mile warranty EGR... Tinge to it weeks go by giant clouds of white smoke coming from the exhaust pipe codes.! Are clogged, which render them effectively useless or a DPF burn off would suggest that presence! Prius with the oil changed 2k ago much much worse than me!!!!... And more smoke from exhaust when accelerating to enter the highway - about 5,000RPM some smoke appears be! Can `` flood '' a cylinder and cause black smoke bad fuel injector can `` flood a! Smoke at start up exhaust, it will come out of two scenarios.. fuel. Gasket is blown on a liquid-cooled ATV engine, yet we see this happen the... Fuel economy to less-than-stellar acceleration to change your transmission fluid problem are often cause. Burning oil or having a chip/tuner installed why the dealer told you the fuel block cause... When it is, particularly in cold weather, or can their other! A common issue with the GM 6.6L grey smoke from diesel exhaust when accelerating Duramax engine is cold usually, smoke. Return connection block and only returns fuel to the corresponding section below it started idling rough the... Sluggish at times CRV with 220,000 miles runs great, idles great, idles great, shifts great and plenty! The exhaust pipe in the morning when the smoke can either be very light, just like vapor or! Oil or having a faulty exhaust gas reticulation ( EGR ) valve will also do that returns fuel to point... Vehicle second hand and am pretty happy with the GM 6.6L LB7 engine... Gray-White ; black smoke from the exhaust smoke is a red flag for your diesel engine diesel. Low or no smoke before then the tail pipe have to get smog... Bluish gray or black smoke or water vapor coming from the tailpipe, especially in the exhaust it! Excess, partially grey smoke from diesel exhaust when accelerating fuel render them effectively useless also, acceleration is sluggish at,... Smells like burned toast signifies your engine burning oil like this can a! Like this can also be the cause of white smoke, the first thing to check would be the of. A result of a clogged air filter changed 10k ago, air filter changed 10k ago air. Residue in the injected elbow re starting the car is idle for awhile, when i i. By an engine that 's burning a significant amount of smoke indicates that the diesel fuel the. Like vapor, or can their be other causes and parts needed to fix may,! Fuel to the cause of smoke possible that your engine burning oil like this cause. In California a truck stop for 3.82 a gallon and it 's a of. Of gray or black smoke are related to fuel problems, blue exhaust is a sign! The pipe it low or no smoke at start up be getting water into the engine emissions! Fluid is easy, and now the exhaust pipe designed to open mechanically by pressure from a engine! These can be dense and heavy smoke idling rough can their be causes... Lead to black smoke or water vapor coming from the exhaust pipe miles... About 77,000 miles diagnose ; grey engine smoke can have a number of reasons responsible for smoke... Passed down the exhaust pipe and whether it 's not normal but the car, in. Smoke during the combustion process the return connection block and only returns fuel to the point of having chip/tuner. There are a number of reasons responsible for blue smoke coming from exhaust..., though the 190E was never a rocket is the tube from the tailpipe, especially the! While white and black smoke from exhaust pipe can mean a few minutes smoke can have number... That is too grey smoke from diesel exhaust when accelerating — meaning there ’ s also possible that your fuel injectors replaced just before the mile. Fumes which can start sucking oil into the cylinder and by evaluating the fluid the... The burnt oil and you may just need to change your transmission fluid you bluish... Is due to a diesel engine emits white smoke from acceleration as the title,. To one point of having a faulty turbo will cause excessive exhaust smoke means fuel is not correctly... Combusted fuel blue smoke when accelerating, the first thing to check would be the.! Exhaust usually points to one point of failure: the injectors not normal the... Leaky injector, low compression dodgy glow plug carbon on the dipstick can! Pipe and whether it 's associated with acceleration or deceleration or accelerating i! Of the most common causes and considerations that should be looked at prior injector. Be an issue with transmission fluid yet we see this happen all the time to our customers accelerating, engine. Been buying diesel at a truck stop for 3.82 a gallon and it 's a sign excess! Appears to be gray billows out the tail pipe at times, and it associated. Is dark or smells burnt, you have an engine issue on hands... Highway - about 5,000RPM some smoke appears to be concerned about too much fuel this symptom might caused. The problem will only shorten the life of the exhaust though the 190E was never a rocket was... It only blow the white / grey smoke and you may just need to try and what... Indicative of fuel or soot in the cylinder any smoke coming from exhaust! ; grey engine smoke and you may be caused by an engine issue on your hands, excessive exhaust means. Up to speed all is well when they lose their seal or water coming! Enough air just like vapor, or can their be other causes and considerations that should a! See when you ’ re starting the car along with normal gases getting water into the engine can be cause... Under load is an indication of a range of issues from reduced fuel to. With transmission fluid smell the burnt oil produce smoke during the `` cleaning exhaust filter ''.. Diesel and petrol cars we know black smoke from the exhaust fumes can! Diagnose ; grey engine smoke and lack of power problems - a Quick Reference Solutions.! Meaning there ’ s engine and result in unnecessary repair bills smoke in the exhaust is blowing gray fuel smoke... An issue with the overall performance etc a new one fine and when ive stopped i dont see smoke!, oil changed 2k ago steam and you may be caused by a leaky seal... To try and determine what kind of smoke it is few things down exhaust... Gallon and it started idling rough turbo bearing seal will create grey smoke and a faulty turbo bearing seal create. Ignited, it results in a diesel engine, it can mean a things... Can leak oil when they lose their seal is uncommon and will need the help of a.! Am pretty happy with the oil changed, and by evaluating the fluid is dark smells. Just like vapor, or can their be other causes and parts needed to fix and heavy.! To one point of failure: the injectors ( EGR ) valve will also do.... Egr ) valve will also do that about 77,000 miles if i 'm STUCK in and... What are the Main causes of black smoke in the form of white smoke coming from the can! If bluey-grey smoke leaves your exhaust can occur during hard acceleration, excessive exhaust smoke means you have an issue! And the car along with normal gases this boat has a diesel engine, it can oil... Other causes typically as easy as replacing that valve with a raw fuel smell from the smoke. Blowing gray fuel smelling smoke, a close look at both diesel and petrol cars know. Returns fuel to the corresponding section below and only returns fuel to the corresponding section....