Blue Smoke From Bike Exhaust

Blue smoke next time I start it. Black carbon is hazardous to health and presents a range of other issues, including visible product contamination and soiling. Better to avoid it at first place. I have recently found that my dirtbike has been spitting out blue smoke,( mostly when i rev it high). it was one of the cleanest exhausts on a truck I ever had prior to these issues. Possible causes: 1. When i came home i turn off the car and after turn on in a few seconds, ther was again some white smoke. Blue/Gray Smoke Coming From Exhaust Produce unwanted blue/gray smoke. piston rings are dead and oil blowing past easy way to tell is to take the oil filler cap off and see if there is a lot of blow back. Cylinder compression can be tested to get an indication of the condition of the rings. Hi all , I was wondering if anyone with a 5. No noise, just a puff of smoke apparently coming from the front and right side of the engine. It runs well and burns no oil to mention but when warm and sitting at traffic lights or similar on driving off I get a cloud of blue smoke from the exhaust. Blue smoke custom. Let’s talk about the different colors of exhaust smoke, their causes and solutions. If you see different colored exhaust fumes it’s time to pay attention to your car. 3l vortex has semi thick to thick blue smoke at start up? The motor has 120,000 on it, runs great with no external oil leaks. Also check any kill switches on the clutch lever, side stand or engine neutral switch. Notice that individual blue smoke components are in the invisible range. chrysler tells me I have a isolated problem. i have a stock turbo, vibrant headers, turbo xs downpipe, cobb sfi and cobb ffront mount intercooler. They said not to worry about it. Now, with +/- 20,000 additional miles there is smoke coming from the exhaust again but only after acceleration. 2007 Mazda CX-7 with about 55,000 miles has recently started spitting out. Sorry if I’m wasting your time. All engines will burn a tiny amount of. Reasons for blue exhaust smoke include bad valve seals, valve train wear in general, the PCV valve, burning transmission fluid and more. Blue smoke is fuel (fuel that was not completely burnt). I recommend having a professional mechanic, such as one from YourMechanic, check out your engine and determine the cause of the oil consumption and the blue smoke coming from the car. 3) When the 2-stroke motor is started dead cold, it tends to produce MORE blue smoke. New intake gaskets and bolts torqued to 35 ft lb. As with the coolant causing white smoke, any amount of oil in the cylinder will cause blue smoke from the exhaust. Firstly I'd like to say Hi as I am new here. Like blue smoke, it can mean that the car is burning oil or suffering from a bad turbocharger. I rode for about 5 miles, waited 24 hrs, started up again today and although less severe, the smoke is there at start up. Exhaust smoke happens because of a potential engine mechanical or performance problem. Hi jsamaroo, blue smoke normally indicates burning oil, black smoke indicates too much fuel and for land vehicles, white smoke indicates water in the exhaust system (doesn't work for our boats, because there is supposed to be water in our exhaust all the times). I own a 2000 Toyota Solara SE-V6. white smoke signals moisture. Our symptom and repair guide can help you identify the problem and the best way to fix it. Inside the vehicle, there is a gasket that seals the manifold to the head. About a month ago I noticed that when I start the car blue smoke bellows out the exhaust. The exhaust emits dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users. do it with very very slight 1/8 the turns on the needle. The other day I changed the oil in it, and ran it around for about an hour fine. If smoke is being released, then this is indicative of a problem. Blue smoke can be caused by multiple engine problems. Black soot on the spark plugs suggests that the fuel/air mixture is too rich, resulting in gray exhaust smoke. On a regular, petrol-powered vehicle, blue smoke from the exhaust usually means that the car is burning oil – but there can be several causes for this. Blue or White Smoke from Exhaust While Driving after Extended Idle - 2013-2015 Ford Explorer, Flex, Taurus & Lincoln MKS, MKT. I’m from Finland and couldn’t get answer from here so I had to move a little wider area :D I have a real annoying problem which I really like to get solved. My bike is releasing white smoke out the tail pipe once the bike has been running for awhile, it only does it in patches it will not smoke constantly. Upon entering Blue Smoke, I thought it was a rather small establishment. A small amount of oil leaking into a cylinder will create blue smoke out the tailpipe. when its just idling it smokes a little. Black soot on the spark plugs suggests that the fuel/air mixture is too rich, resulting in gray exhaust smoke. Blue smoke is usually caused by oil getting past the piston rings during acceleration or by the valve-guide seals on decel, eventually resulting in low oil level in the crankcase. The smoke comes out of the tailpipe at the end of your vehicle. Blue smoke starts after 5 minutes of driving 15-25mph. After now that i have everything on my bike when i first start it up it blows a lil smoke kinda gray black not blue. On a new bike a coolant leak is not very common but could happen. Yes, the blue smoke is most likely the engine burning oil. My 1990 300 zx TT has begun to make blue (and bad smelling) smoke from the left exhaust pipe, at idle speed. Black carbon is hazardous to health and presents a range of other issues, including visible product contamination and soiling. Also, when I turn the bike of, a little bit of white (maybe blue and white, not enough to tell) comes out of the exhaust still. It does however have a major issue. Blue/Gray Smoke Coming From Exhaust Produce unwanted blue/gray smoke. I know airheads have a reputation for turning these blue in a short time, but wonder if any of you folks have any hints (other than not running the bike) for keeping them shiny. Blue or Gray. If it smokes all the time it might be rings or bad head gasket. I have a 1969 Chevy Impala. If any Idea that can help please advise. Blue Smoke from Exhaust Pipe. Blue or white smoke from my car exhaust – what does it mean? It’s easy to assume that because your car is working then there’s nothing to worry about. Yesterday after five minutes of neighborhood driving, I accelerated after a right-turn-on-red (so accelerating a little heavily) and saw a great deal of white (maybe blue) smoke coming out of my tail pipe, and at the same time experienced a loss of acceleration (or perhaps my transmission shifted in a strange way, I'm not sure) then the smoke. A little bit of blue smoke will be normal if you are accelerating fast and/or hard, the engine has a load on it, and even first min of running especially while it is choked. The dealer adjusted the carb when I carried it in. First I want to say thank you for this awesome web site. there might hace been some oil in the gas, i don't know. Hey guys picked up my cat on Friday. Now, with +/- 20,000 additional miles there is smoke coming from the exhaust again but only after acceleration. Sometimes it starts without any smoke at all and doesn't use more than a normal amount of oil. Have an old Long 560. A little blue smoke is normal on older bikes, but not desirable. Checked the coolant level and it remains at FULL. According to the OP, the car was running fine and then all of a sudden started "blowing tons of smoke" (it's in the title). Especially if you’re new to smoking meat and just dialing in the right temperature is a challenge. February 13, 2019 Motor Sports NewsWire Events, Motorcycle Comments Off on Rinehart Racing to Showcase New Exhaust Offerings at 2019 Daytona Bike Week. Yesterday after five minutes of neighborhood driving, I accelerated after a right-turn-on-red (so accelerating a little heavily) and saw a great deal of white (maybe blue) smoke coming out of my tail pipe, and at the same time experienced a loss of acceleration (or perhaps my transmission shifted in a strange way, I'm not sure) then the smoke. I already posted a topic at PAOM's forums, but nobody knows the answer. The possibility of ring misalignment is more probable because this bike has had a BBK. If it is cold out, this may be normal. A small amount of oil leaking into a cylinder will create blue smoke out the tailpipe. White Smoke From Exhaust FAQs: Though the above problems and solutions are generic, there may still be a few issues that are not covered above. That "white" smoke you see is probably actually very slightly blue. These are possible symptoms and causes: Valve Seals: Leaking valve seals will cause blue/gray exhaust smoke. it was one of the cleanest exhausts on a truck I ever had prior to these issues. Gray smoke can also be an issue with your automatic transmission fluid getting burned up in the engine. Blue or White Smoke from Exhaust While Driving after Extended Idle - 2013-2015 Ford Explorer, Flex, Taurus & Lincoln MKS, MKT. Is this worth trying to repair. I was down in Clearwater on business & after reading the reviews I went to Blue Smoke Cigar. Signs of burning oil are usually accompanied by Blue Smoke from the exhaust. Runs fine, oil pressure is 45 psi @ idle. Blue Smoke from Exhaust Pipe. Every time I start my engine, light blue smoke comes out of my exhaust pipe. - Answered by a verified Technician We use cookies to give you the best possible experience on our website. 4t with 49K on the clock. Firstly I'd like to say Hi as I am new here. I brought the truck in for its 5000 and 10,000km oil changes and let them know both times about what was going on. Bike does not seem to be consuming oil at a higher rate. i purchased my Lexus IS220D 2011 roughly 6 months ago and unfortunately it has had an issue since my first week of ownership that the dealership I purchased it from are refusing to take responsibility for. If your bike is smoking a lot and the smoke is black or very dark, you may have a problem of poor carburetion. This is where the fuel is burnt, and power is created to move the car. I have a 2003 Freightliner XL Clasic with a Detroit series 60, for the past two months I have noticed white and blue smoke. FS/FT: SSR GTX01 Gunmetal Blue. And the engine ran perfectly normal. Blue smoke from the exhaust of a '62 Founded 1958. First is that I have oil on the tip of the exhaust and blow blue smoke. I've noticed recently that there is a puff of blue smoke from the exhaust on starts after the car has sat for at least a few hours. Currently the bike has 1400miles from new, run in by the book by me The oil tank has gone from Max to Min in 600-700miles With a Hot engine you Rev the engine reasonably high when stationary and have some light white/blue smoke from the exhaust. 2017-2018 F-150 - 2. Page 2 of 2 < Prev 1 2. This is the fully synthetic engine oil with API-SL JASO MA rating and the fully synthetic 75W90 gear oil (GL-5 rating). 3) When the 2-stroke motor is started dead cold, it tends to produce MORE blue smoke. What does GRAY smoke from my exhaust mean? Gray smoke is hard to diagnose directly. It doesnt happen all the time, just getting more noticeable. recently my car started to smoke blue from the exhaust so I checked my turbo and saw that it has oil in the intercooler piping and in my intake I changed my turbo, my intercooler and intercooler piping and it still smoke blue. I've seen many engines that have been nicely painted, detailed, and look better than new, only to appear totally worn out when they're started up. 0L Duratec Petrol Engines (Mondeo Mk3): Hi everyone, I am new to this site and have joined in desperate need of help. Re: Blue smoke from the exhaust The WILD GOOSE lives on thanks to all the guys who replied to this All of the information and advice I got was right on, you guys know your stuff! To update: Blue smoke issue resolved - the rubber parts of the exhaust system were burning causing the smoke. Its only when I push on. Stopped after 5 minutes or so, maybe less. White Smoke From Exhaust FAQs: Though the above problems and solutions are generic, there may still be a few issues that are not covered above. I got out smelled the exhaust, and it smelled just fine. My car blows blue smoke from exhaust when car engine temperature reaches normal, I. SimpleCarAnswers. Blue Smoke from Exhaust Tail Pipe Step 1 - Some engine's have small oil drain back holes in the cylinder head, these holes allow the engine's oil to drain back into the oil pan. i couldn't tell. start there. Blue Smoke Blue or grayish smoke means you’re burning oil. Black soot on the spark plugs suggests that the fuel/air mixture is too rich, resulting in gray exhaust smoke. It can happen when the piston rings, the valve guide seals or other components of the engine get worn out or damaged, causing oil leaking. I don't really see any oil around the valve cover, best I can tell anyway. There are two possible reasons: Possibility # 1 - The check valve for the crankcase ventilation sticks which forces engine oil out into the exhaust pipe, resulting in blue smoke. I have a 80cc engine i bought from ebay. bike black smoke problem Hindi. Exhaust does burn eyes, and smells, if you're running rich. If your car is turbocharged, blue smoke can also mean the blower is stuffed. How To Fix White Smoke From Exhaust Issue. If all is well, blue smoke could indicate wear and tear on the engine seals. SMOKING ENGINE Implications - BE-104A. Exhaust does burn eyes, and smells, if you're running rich. Trying to figure out if something is wrong or if this is normal for the hellcat engine. Blue : If your truck is emitting blue or blue-gray smoke, oil is burning in your engine. it will be milky looking. Black soot on the spark plugs suggests that the fuel/air mixture is too rich, resulting in gray exhaust smoke. The question is where the oil is coming from, and how does it get into the combustion chamber. I have a 2004 2. You say the engine was rebuilt a year ago ? How was the head and what did they do to it ?. E when temperature needle reaches exact middle between C and H. When I shut the bike off I get a trail of white smoke from that cylinder. However, it is also possible for a car to make blue smoke if a turbocharger is broken or experiencing an oil leak. There may be a leaking valve, which is letting oil get into places in the engine that it’s not supposed to, causing smoke to come out of the exhaust. Review of: Kumho Ecsta SPT Colored Smoke; i really like these tire and willbuy them again but was disapointed to see that you can only get red for 15 inch rims, cause i wanted blue. Exhaust smoke is a way of your car communicating with you to say what is wrong. My 2006 Yamaha VStar 1100 air-cooled motorcycle has 10k miles on it, and has white smoke in the exhaust. When you burn oil in the combustion chamber, your exhaust puffs out in a lingering cloud of blue-white. Hey guys so lately I have noticed when I'm on the freeway blueish white smoke starts coming out of the exhaust. You should see a nice, big, fat, blue spark. We'll also look at the different types of smoke. Problem: There is blue smoke coming out the exhaust, intermittently. After now that i have everything on my bike when i first start it up it blows a lil smoke kinda gray black not blue. Blue Smoke; Black/Brown Smoke; White Smoke. Bluish tinted smoke from the exhaust means that there is an internal oil leak into the combustion chambers from the valve guides, valve stem oil seals and/or the piston rings. It burns even worse if it's running lean. As an aside, it seems like my turbo has been a bit slow to spool up lately, and cold starting is somewhat hard with a slight haze of blue smoke. I have ordered piston rings to change. Heavy fog like white smoke is usually coolant. You never know when it is going to do it. Warm startup no smoke at all. A backyard mechanic can diagnose the problem by observing and smelling the smoke. White smoke is usually just condensation burning off, or possibley a coolant leak. Anyone who’s ever seen a Lexan pulser cover on a ZRX at speed knows how MUCH oil is in the valve train area at speed. 4) Blue or black exhaust smoke An oil leak in the combustion chamber, resulting from a cracked turbo housing, may lead to blue smoke shooting out of your exhaust pipe. The exhaust valve seal on these bikes is ofter overlooked as a potential problem. Blue Smoke. If there is smoke coming from the exhaust it could indicate a more serious problem with the engine. What does GRAY smoke from my exhaust mean? Gray smoke is hard to diagnose directly. for water cooled bikes; dense white smoke is a blown head gasketanti-freeze is gettin in the cylinders. Drove it home following break in procedure. My 12-year-old car has started to blow blue smoke from the exhaust when starting after sitting overnight or longer on cold days. Could have over filled the oil not good!. The longer the car is idle, i. White smoke is usually just condensation burning off, or possibley a coolant leak. Also what is the best oil to use for my bike. I just got installed my downpipe on my car, and increased the boost to 16psi, and after driving the car hard on the highway i noticed blue smoke coming out. A lot of smoke from exhaust when cold: Bike Chat Forums it smokes quite a lot and if you rev the bike more smoke comes out. No traces of water or gunk in the crankcase just blue smoke exhaust. Besides white smoke, you can have black smoke, blue smoke. I get puffs of blue\grey smoke when I start the car from cold let it idle for a while then blip throttle Blue\Grey Smoke from the Exhuast, after a spirited drive, no smoke all clear, let it sit for a while (2-3 hours) again the same thing, no smoke on initial start-up just once its warmed u a little then smoke then once fully warm Nothing ??. It may have nothing to do with your stalling issue at all. If your manual says to do some service at a certain interval, then do it. I waited for the car to warm up and then drove it around the block - about a mile. I've got an 05 plate Gti (AXX) with 70k on the clock. Hello, I was wondering if there was a way to get a rough estimate of the cost to fix the heavy blue exhaust smoke problem. That was a quite big job. Diagnosis: Not normal. When i let it sit and idle. It has a catless exhaust, trifecta tune, and a rear muffler delete. I've heard yamalube isnt that great. Keeping all the quickly moving parts of an engine well oiled is super important, but oil has no place in the combustion chamber, which requires air, fuel and spark only. From my experience blue smoke is either from a turbo with blown seals or from ingesting oil through the intake system. Like smoke that rolls off a cigarette, white. But i would still check valve seal's, i have see it in some LS1's working for a Gm dealership, do your wet test if rings are showning some wear well thats to be. Also what is the best oil to use for my bike. The smoke comes out of the tailpipe at the end of your vehicle. I recommend having a professional mechanic, such as one from YourMechanic, check out your engine and determine the cause of the oil consumption and the blue smoke coming from the car. White/blue smoke at high RPMs. When using the key in the driver door, I can unlock all doors and the boot however when I lock it, it only locks the driver side door. 3l vortex has semi thick to thick blue smoke at start up? The motor has 120,000 on it, runs great with no external oil leaks. Just my 2 cents. Lets say your cooking on a stick burner. White and blue smoke from exhaust. Paulas" Thanks for the info. Coming to work this afternoon, I had a sudden loss of power and several large puffs of blue smoke from the exhaust. 0 TDCi diesel has started producing a lot of blue smoke on startup, especially in cold weather. It is tuned up every year when annual maintenence is done to our coach. Lots Of White Smoke Out of Exhaust Pipe. There are a number of possible causes for blue smoke coming from your engine - and that is why we've produced a 90-second animation to show you the most likely reasons for the problem. According to the previous owner, his grandfather drove the car. one of the reasons I have never put on an after market exhaust is. Blue smoke is attributed to oil entering the combustion chamber and being burned or blown through the cylinder and burned in the exhaust manifold or turbocharger. From my experience blue smoke is either from a turbo with blown seals or from ingesting oil through the intake system. Sometimes you … Smoke From Exhaust- What It Idicates? (Black- White- Gray And Blue Smoke) Read More ». Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise. Eliminating Blue Smoke in 4-Stroke Exhaust Probably the largest detractor of an otherwise beautifully restored 4-stroke engine is having clouds of blue smoke belch from the exhaust. So I''m wondering if I have a motor problem or do I need to replace certain seals. After I leave my car at idle for 5 to 10 minutes while I'm eating or waiting on someone I notice some blue smoke coming from the exhaust pipe. If your bike is smoking a lot and the smoke is black or very dark, you may have a problem of poor carburetion. Â When I step on it it makes a nice cloud then clears up, only to reappear when I stop. grinding sound and loads of white smoke came from the exhaust stopped the car and checked to see if any pipes had come off but nothing untoward under the bonnet. On a new bike a coolant leak is not very common but could happen. During deceleration, however, blue smoke means the cylinder heads' valve guides are damaged. Hi I have a 150cc pit bike. Although this is a rare symptom, following our repair guide will help you find the most appropriate part to replace. smoke most of the time white smoke out of the exhaust is coolent and blue smoke is oil both one of which are getting into the combustion chamberyou could have blown a head gasket or bad valve seals and worst case cracked a cylinderhave you checked your oil to see if it has coolent in it. It is worse in cold weather than warm weather. Besides white smoke, you can have black smoke, blue smoke. New intake gaskets and bolts torqued to 35 ft lb. When idleing normal alot of smoke comes out. I started my car today and for the first 3-5 seconds, blue smoke came out of the exhaust. i couldn't tell. Note: If the exhaust system produces blue smoke, it is necessary to check whether the engine is also drawing oil into the combustion chamber through the crankcase breather, which suggest that there is a fault in the area of the crankcase breather. Before you go into panic mode, narrow down the problem according to the color of the smoke. Blue white smoke is oil being burnt could be number of things. 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. First thing I'd do is to pull and examine the plugs. My car blows blue smoke from exhaust when car engine temperature reaches normal, I. The car started blowing out blue smoke a few months ago but didn't give it that much notice. It really does not smell very good and is not good for your health to breath in. White smoke from exhaust please help It is just 9 months old. Inside the vehicle, there is a gasket that seals the manifold to the head. Â Makes more black smoke than. It happens as wheater gets colder the heat in the exhaust causes condensation when cooling as well as when heating up in cold conditions. Remove the engine appearance cover, if equipped. Blue Smoke: Blue smoke is caused by engine oil entering the cylinder area and being burned along with the fuel air mixture. The oil can also come from an air filter overfilled with oil or an excess of oil in the crankcase. At 5000K the tech came out, started it and gunned the engine but no blue smoke. My bike is releasing white smoke out the tail pipe once the bike has been running for awhile, it only does it in patches it will not smoke constantly. I have a 2004 2. I know that the weather is cold and white smoke coming out from the exhaust is normal. Once it's warm though its fine only the first start of the day. I have searched for the better half of today at work and cant seem to get what I'm looking for. Transmission fluid may be entering the intake manifold through vacuum modulator. It seems like this is common with the 2. When I got home I checked the oil level and it was close. I just did a cam swap, used the patriot gold spring kit with new valve seals. This is where the fuel is burnt, and power is created to move the car. Hopefully it's nothing big. I don't get any black smoke if its below 12k, and if I give it lots of throttle while the RPM is low it doesn't blow smoke either. I waited for the car to warm up and then drove it around the block - about a mile. I've heard yamalube isnt that great. it is way easier to remove the intercooler and see if there is a lot of oil inside of it before doing a leak down test. About a month ago I noticed that when I start the car blue smoke bellows out the exhaust. I am the owner of a 2011 Disco 4 TDV6 diesel with 98 000 kms. There was a little white smoke however it still smelled fine. If the blue smoke only appears for a moment at startup or after idling (e. The engine has good compression. In most cases you want your top vent fully open. If it's blue smoke means it's burning oil, I would go straight to valve seals. You may have to register before you can post: click the register link above to proceed. This was after a cold start as well as after it was running for a while. The smoke also gives you a good idea of the kind of repair work that is going to be necessary. Due to the age of the engines that comprise our hobby, they usually have worn, glazed cylinder walls and rings that no longer seal properly. These are possible symptoms and causes: Valve Seals: Leaking valve seals will cause blue/gray exhaust smoke. 2012 ultra limited, big blue pearl&vivid black, 11072 miles vance & hines true dual exhaust screaming eagle tuner chrome front end low profile wind screen abs brakes 6 speed heated grips. The smoke coming out is black and very sooty. 4) The EPA's WAR against the 2-stroke was to reduce hydrocarbon and NOX emissions in the exhaust. In fact, these particles range in diameter between 0. Blue smoke coming out the exhaust. I'v only ever seen 2 strokes do this before. Blue puff of smoke (2001 BMW 740iL) My 2001 740IL every once in a while will blow out a cloud of blue smoke from the exhaust when starting the engine. Here's an example from my own bike. It seems like this is common with the 2. I've done some Googling and it seems a common problem but can have a variety of causes. I need your help in investigating the route cause of the issue. The leak could be caused by damaged piston rings, leaking valve seals or some other issue. Blue smoke coming from exhaust - 1999 S70 Post by gryphen » 26 Sep 2010, 19:49 I've looked through a bunch of other posts about blue smoke, and I think I have a vague idea about what's going wrong but I wanted to get some specific advice, if possible. Blue Smoke celebrates the evolving American South and honors its culinary traditions. After checking the compression to rule out bad rings, I was able to find an inexpensive used turbo ($175). Exhaust black smoke. Things can be running seemingly fine everywhere else, but smoke from the exhaust can tell a whole other story. With my Mustang, the blue smoke at startup happens after the engine had been run for only a minute or so during the previous start, especially if the ambient temperature is cold. Any idea what is causing this. Exhaust does burn eyes, and smells, if you're running rich. I ran it for several minutes but then I started to see what looked like white smoke coming from the cylinder. I just bought this car about 2 months ago with 55,000 miles now I have 56,000 miles on it. Could be dead turbo seal if you have a turbo diesel. Hey guys so lately I have noticed when I'm on the freeway blueish white smoke starts coming out of the exhaust. I checked the oil and there doesnt seem to be any water in it. Transmission fluid may be entering the intake manifold through vacuum modulator. The car hasn't been driven much since then, maybe 800 miles or so. The oil can also come from an air filter overfilled with oil or an excess of oil in the crankcase. A lot of smoke from exhaust when cold: Bike Chat Forums it smokes quite a lot and if you rev the bike more smoke comes out. Stopping at any red light or waiting, there are still white smoke flowing out but nothing when car is moving. If all is well, blue smoke could indicate wear and tear on the engine seals. If there is smoke coming from the exhaust it could indicate a more serious problem with the engine. Modern turbochargers are very reliable, and a used, working unit is not a big risk. "White smoke" can either linger around or just be steam from certain temperatures and a cold exhaust. RE: Truck starting with exhaust smo I was always told black smoke was an overrich condition,(too much fuel or incomplete ignition) blue smoke was an oil burning conditon ( indicated poor oil control either in worn valve guides or piston rings) white smoke was an indication of blown head gaskets or on rare conditions, burning brake fluid. I don't really see any oil around the valve cover, best I can tell anyway. it smoke blue only after boosting and sometimes at 5psi. I did replace my O rings but know this is happening. Blue Smoke on Acceleration was created by Anonymous User101 1994 GMC Sierra 5. You have to push the gas pedal just slightly and keep it there as it is sputtering and trying to start. for water cooled bikes; dense white smoke is a blown head gasketanti-freeze is gettin in the cylinders. 171000 miles.