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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 white smoke to come from an diesel mondeo exhaust during the first start of the day?

If it is only at the start of the day and disappears shortly after startup, it is just condensation in the exhaust that is burning off. Pretty normal, especially in cold or rainy weather.

Evaporative emission control system-vent control circuit?

It's one of the most common error codes which you can run in if you own Toyota Camry. It's well known that presence of such code does not mean that something is wrong. First try reseting the computer. If the code comes back than you have to change the sensor. The sensor is usually attached to the charcoal canister. If you get it from Toyota dealers it's about $170. Sometimes you can find cheaper on eBay.com

White smoke from tailpipe?

There are two kinds of 'white-smoke'. If it dissipates quickly into the air, its just steam (water) no big deal if it goes away in a bit.

The second is the kind that hangs in the air and leaves a cloud behind the car. That's OIL. That's expensive!!

How do you explain what the terms Trips and Monitors are?

The definition of trips and monitors can differ depending on the situation. A trip is usually a switch and a monitor is usually something that watches something else and reacts accordingly.

You get a cloud of white smoke coming out your exhaust every time you speed?

Pretty sure that means it is burning your engine coolant. The anti freeze is somehow leakinging into the combustion chamber and when it burns with the gas the smoke is white.

What might be the cause of white smoke coming from the air filter exhaust pipe in my 1975 Pontiac Firebird?

Answer

White Smoke is a symptom of coolant in the combustion chamber. A blown head gasket or cracked head is the most likely cause. Stop drivng the vehicle immediately as serious engine damage will occur. Get this fixed ASAP.


There is a second possible explanation. It could be blow by. All engines have some amount of blow by.....but as piston rings wear, this can get worse. The way blow by and pressure is handled in most engines is through the PCV valve. The valve pulls these gases into the intake to be burned in the combustion cycle. If the valve is stuck closed, or missing altogether, the gases will build up and eventually start coming out through the air filter exhaust pipe as you've described.

What causes white smoke from diesel engine when its hot outside?

White smoke is unburned fuel, usually caused by low combustion temps in the engine.

It should clear up after the engine warms up. If it takes a long time or the smoke persists when the engine is warm, it could be retarded injection. If you have a cold start lever pull it to the first notch and see if the smoke disappears. If not it could be an injector problem, or an injection problem (injection pump TDI... etc)

How do you replace or clean an EGR valve on a 1997 Dodge Stratus 2.0 liter?

you should find the egr in the front of the motor under the throlltle , two screws hold it in place , small hands and a univeral and off it comes . to find what yours looks like you can search eBay and see a pix or in your browser type in egr and engine size . it was harder to get to egr then anything no need to remove housing , if on AOL email me and i can offer a mechanic offering free repair advice and he helped us. be sure to clean port behind egr with ice pick and vaccumm it will or maybe blocked with black carbon build up . we used a wrech and it had a twisting ten mm ? on it and used an extention on it to gain access to it. we did remove air intake and one hose for ease

How much should an exhaust manifold gasket job on a 1997 Chevy Lumina cost?

Do it yourself, or mechanic? If you do it yourself your looking at $17.14 from partstrain.com. However, im sure if you took it to a mechanic they would tell you at least $80.

What is engine carburetor?

The device that mixes the proper amount of fuel and air depending on the position of the accelerator. The mixture is then sent down the intake manifold to all cylinders. It allso sets the idle speed of the engine and increases the fuel/air mixture during a cold startup.

What causes blue smoke from the tailpipe?

Probably it is burning oil.

It happens if you a using a mist system of lubrication. If not, you should probably replace your piston rings. Combustion of oil causes fouling of the spark plug.

How do i test the fuel gauge on a 1986 ford bronco 2 it always reads empty i already no the float sinks yet is there a way to still check the gage to see if it will read once i get a new float?

The way to test the gauge is to unhook the wires to the sender and the gauge should read empty. Now, ground the sensor wire and the gauge should go all the way past the full level. If this happens your wiring and gauge are fine.

Exhaust valve smaller or bigger than intake valve in a turbo charged engine?

the exhaust valve will always be smaller as the piston is forcing the combusted gases out. The intake valves have to be bigger as the piston is only drawing the mixture in through sucktion.

What is the purpose of Inert Gas deck seal onboard crude oil tanker?

The 'Deck Seal' and 'Non-Return Valve' are automatic and manual devices to prevent backflow. Backflow of gas could result in CH gas from the cargo tanks reaching the boiler, leading to an explosion.

What is the cause of white smoke to come from an engine after you change the radiator hose?

White smoke from the exhaust is normally an indication of coolant entering the combustion chamber. Could be a blown head gasket or cracked head.

What symptoms does a bad egr valve cause on a 1988 f150 with a 302 cause?

This depends on how it failed.

  • If it is plugged, stuck closed or otherwise prevented from allowing flow it may cause ping at mid to high throttle settings and will fail smog inspection.
  • If it is stuck open or leaking past pulling a spark plug wire will increase rpm. It will not idle correctly, will miss hesitate and just mess around generally.

What does it mean if your car smokes and will not start?

Something's hot! lol What does it mean when anything smokes? You could have a leak and it's hittin your headers or anything else hot. you could be burning oil. Plenty of things could be wrong.