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Emissions and Exhaust Systems
Internal combustion engines have byproducts called emissions. These byproducts are either particulates or gaseous chemicals. Emissions travel from the engine via an exhaust system, which is a system of pipes that leads the emission away from the combustion source.
1,423 Questions
What causes a '73 Nova to emit white-grey smoke from exhaust when starting and revving engine?
the valve guides could be worn out
The carburetor is running fuel rich and needs adjustment. If it were valve guides or rings the smoke would be blue
If it only occurs when the engine is cold or the weather is extremely cold, be suspicious of water vapor... it's a natural occurance during the combustion process. If the white vapor goes away when the engine warms up, no problem. If the smoke is blue-ish, it's probably engine oil. Check to see if you're getting fuel into the oil. That can cause the oil to thin and get past the rings, then the motor oil doesn't burn as cleanly and can leave the blue/grey smoke. That can be caused by dirty injectors that do not vaporize the fuel but sends it out in a stream, then the liquid fuel seeps past the rings to mix with the oil.
How will a hole in the exhaust affect fuel consumption and power output?
It will have a negligible effect on anything except your health. Carbon monoxide will enter the passenger compartment and could possibly cause you to either have an accident or do serious physical harm. Driving a car with a hole in the exhaust is dumb. Carbon monoxide is orderless and tasteless and you will never know it is present. Get this fixed ASAP and only drive with all windows open. The above is not entirely true. A hole in your exhaust WILL affect your car's performance. 1) The loss of 'Back Pressure' in the system will affect the effective 'Scavenging' of the exhaust fumes, because motor manufacturers spend millions of pounds/dollars 'tuning' exhaust systems to make them efficient. 2) In those cars fitted with Fuel Injection, a hole could interfere with the readings of the system's Oxygen (Lambda) sensor, thus resulting in poor fuelling, poor power etc. 3) Air entering the hole and mixing with unburned fuel in the system could cause a 'Backfire', damaging the exhaust even more. 4) It can cause damage to your cataluytic converter (if fitted)...these are EXPENSIVE to replace. Extra Extra Again the above is still not strictly true 1) Back pressure is what racers andmodders want to minimise, manufacturers do spend a lot of money but often have to compromise, this leading to not so effective systems. 2) Only if the hole is before the sensor will it affect the readings 3) Very littel air could enter a hole, again depending on where it is, if your car is backfiring, theproblem could be elsewhere, unlikely to be hte ingress of air through a hole in the exhaust 4) Again it could only damage the cat if it before the cat in the system, after the cat will not affect it at all. Cheers
Where is the bank 2 o2 sensor on a 2004 izusu rodeo?
the bank 2 is on the driver side i got this info from an Isuzu mechanic
What happens when the emission light turns on in a 2001 Ford Focus?
It means that one of the emission system components is malfunctioning. Could be due to some of the following reasons: dirty or inoperative PCV valve - dirty oxygen sensor - your gas tank cap may be loose or the wrong type.
I just filled my tank up with Premium Gasoline at Sunoco. I was almost empty and the highest octane pump sputtered and stopped at 12 gallons. I knew I needed more for a fill up so I finished up with 4 gallons of the next grade lower. I drove away, and about a mile down the road my car started losing power, sputtering, and jerking. I turned around and headed back to the station and just made it when my truck, a 1992 Ford Ranger, died. (It is in good shape with 130,00 miles and a recent computer diagnosis, lube, and compression test just 2 months prior). The temp gauge showed normal but there was a burning smell and white smoke coming from the catalytic converter. The mechanic suspected it was on fire. I suspected it was water in the gas that had not "ignited" and was now running through my exhaust and was sending off white steam. My truck wouldn't restart so I've left it there and am waiting to hear back. I've had bad gas twice before from a different station and my car lost power but never shut down like this. For both these episodes I ran STP through the tank for several fill-ups afterwards and performance returned to normal. This may not be an answer, but an educated observation from a former mechanic.
The number of exhaust manifold in a v-8 engine?
Two, A V-8 means that in theory looking at it from the front, it looks like a V. Each side has a bank of 4 cylinders, Each bank has an exhaust manifold equaling one on each side.
What would cause white smoke to come out of the tailpipe?
If you are having a lot of white smoke all the time the car runs then check for coolant mixing in with the oil,look for water in the oil when you check the oil or milky brown oil. This produces a white "steam" that is very thick to come out of the exhaust. If your engine temp. gauge is very high and over heats you probably have a blown head gasket. If it has a bluish tint look it may be burning oil. Indications might be how much oil is currently in the car i.e too much oil, or if there is a leak in the line you may be adding a bunch of oil over a short time. If it is only when you first start the car and the engine is cold, then it may be that your valve seals are bad and need replacing. Hope this might help or at least give you some ideas...
AnswerIt's coolant. headgasket, cracked or warped head, intake manifold or gasket, or cracked block are your sources. Take it to a care car service to have it checked AnswerAre you sure the smoke is white or is it a light blueish color start the car and have someone stand in a position to see the tail pipe and see if much water comes out with the smoke if it does and you have been running low on antifreeze i would say a head gasket if no water and not low on anti freeze look at worn valves or valve seals or worn rings good bet on these two items good luck AnswerBurning oil in the fuel would cause black smoke so it definitely has nothing to do with that. White smoke can be caused by water in the combustion camber or unburned fuel. If you've be having bad gas mileage you probably have a problem with your fuel or ignition system or timing. You can usually smell the fuel in your exaust when this happens. If you smell no fuel and you've had no change in fuel economy check for water like one of the previous posts said. AnswerTry the changing PCV, it work for me when white smoke(rock concert-like) would come out of the exhaust every time the car was turned on. That was the only time the white smoke would come out in my case. If it is a constant white smoke emitted from the exhaust, especially while driving, it could be something else. AnswerOne thing that I noticed, is that when valve seals get some years on them, a little bit of white smoke can emitted from the tail pipe when you first start it up or when you set at a stop light idling. But usually not that much smoke. Old valves could be causing you to run rich. AnswerSomehow water has or is being burned,check coolant level and temp if you have temp light put a guage in if coolant low there is your problem if not check egr valve and pcv valve also check oil level if high and milky there is high possibility that you have blown head gasket and or block may be cracked allowing oil to get into the oil pan. Answeri think it would be a blown head gasket or blown headcheck the cad. converter ======================== That's normal if you dive the car "HARD" .. Turbo kicks in and lots of air/fuel => exhaust then too hot
What does emission check message mean on a Renault scenic?
Probably means that one of your cylinders is misfiring. I have had this twice and the problem was one of the ignition coils which is a very common problem with both the Scenic and the Megane.
Where is the oil filter in a 1998 F250?
really hard to say you would have to give a little more detail like the engine size in the truck most oil filter are in different spot on different engine blocks and now most cars are going back to the canister oil filters so you wont see the old filter hanging around
What does Large emissions leak meanon a Sunfire?
this can be a tricky one to determine a evap leak would be from the gas cap all the way to the front off the engine this could be a faulty gas cap itself or a broken vent line on the fuel take or also a broke evap line in the engine compartment the use smoke machines now to determine were leaks are coming from it fill the system with smoke were you see it is the problem sorry not much help but just look at all the plastic and rubber hose from the purge valve and canister
Why do I have thick white smoke coming out of exhaust as I drive?
Generally speaking, white smoke is a sign of a blown head gasket, cracked cylinder head or any defect allowing water to enter combustion chamber. Remove spark plugs and look for one that is noticeably cleaner than the rest. That's the problem cylinder or if 2 adjacent plugs are like that it is a crack in the head gasket between those 2 cylinders.
Could gasket sealer make your car smoke white from the exhaust?
Possible but doubtful. White smoke from the exhaust is normally a sign that coolant is entering the combustion chamber. This will destroy an engine in short order if not repaired. My guess is someone did not install the head gasket correctly or over or under torqued the head bolts and may have cracked the head.
Possible but doubtful. White smoke from the exhaust is normally a sign that coolant is entering the combustion chamber. This will destroy an engine in short order if not repaired. My guess is someone did not install the head gasket correctly or over or under torqued the head bolts and may have cracked the head.
Why is your emissions light on?
Unfortunilty there are no "emisions lights" on Honda Civics. However there are "check engine light" or "malfuntion indicator lamp". They can be on by many reasons including Engine knock, or something as simple as a loose gas cap.
How long does it take to die from car fumes?
1-4 hours depending upon how your engines running and how sealed it is were you are
According to the United States Environmental Protection Agency (EPA), you could die from carbon monoxide poisoning in minutes if the concentration is high.
What causes white smoke when vehicle is idling in cold weather?
I've been the "smog" guy for 23 years in Denver. Your best bet is to replace the stuff with better stuff. A free flowing catalytic converter and a 'chamber' type muffler fromSummitt ($100 for both) will help free up power. Y the exhaust into one 3" tube, a 3" converter and a 3" muffler, then split into two 2 1/2" pipes. Same or MORE power than an open exhaust. Next, if its got an air-pump, just unhook the belt. Headers with built in air tubes are available, but a little pricey. Playing with computer chips for increased 'pulse width' is best left to the pros and gets 'spensive quick!!!
Technically, any removal of 'Smog-Equipment" is illegal. But.............
Look at your axle. There's a slightly pumpkin shaped fitting on the axle. That's your differential carrier. The differential is inside of that, and it's what allows your wheels to rotate at different speeds when you make a turn or round a corner. The differential fluid goes into that. You'll probably have to remove the back cover off the differential carrier in order to drain the old fluid. You'll also have to scrape off the old gasket and replace it with a new gasket and RTV sealant. If it's been sitting for five years, you should change that fluid, or have a shop do it. The diff oil is probably no good anymore, and will not properly lubricate the pinions and ring gear, and will cause it to wear prematurely. If you're unsure of how to do this, a Chiltons or Haynes manual for your vehicle would be a good purchase.
P0453-Evaporative Emission control System Pressure Sensor?
Could be a faulty pressure sensor. The pressure sensor on many GM vehicles is located on top of the fuel tank attached to the fuel pump/sending unit assembly. It can be changed with the tank in place if you can get your fingers on it. Unplug the wire harness from it and wiggle the sensor straight up and out.
Why does your 1969 c10 pick up blow white smoke?
Blown head gasket. Fix ASAP, and do not drive until you can have it fixed. Serious engine damage will occur. If it's a automatic transmission then pull the line off of the Modulator valve and see
if it's full of transmission fluid. If it is replace valve on side of transmission.
What it does is suck trans. fluid up through the line and into the intake manifold
and then burns it and it makes white smoke.
Hey Clay you new that, You just forgot, It's hell to get old.
HAVE A GOOD DAY.
Sounds like it may have a blown head gasket. The knocking and white smoke would indicate that you are probably looking at a complete overhaul. Someone has driven it with the blown head gasket and bascially ruined this engine. Drain the oil and change the filter. Drive the car to a trusted mechanic and have them check for a blown gasket.
