Wiki Answers > Categories > Cars and Vehicles > Parts and Repairs > Fuel and Engines > Emissions and Exhaust Systems Questions

Emissions and Exhaust Systems Questions

Subcategories of exhaust and emissions systems:



Total questions: 277

How has technology affected car pollution?
Popularity: 305

Why would your engine smoke?
Popularity: 236

What would cause white smoke to come out of the tail pipe?
Popularity: 141

Why would a car smoke when it idles?
Popularity: 127

Why would gas come out of the exhaust pipe?
Popularity: 112

How do you remove the emissions systems from your vehicle?
Popularity: 109

Why would a car burn oil when it does not leak or blow blue smoke?
Popularity: 105

Why would smoke come from behind the engine?
Popularity: 97

Why would white smoke come from the exhaust of a car when it was restarted after overheating?
Popularity: 75

What would cause a strong fuel smell from the exhaust pipe?
Popularity: 72

What would cause black gunk to come out of the tail pipe?
Popularity: 69

If after you take off from sitting at a light you get smoke from the exhaust but it goes away could this be the valve?
Popularity: 67

What would cause white smoke to come out of a tailpipe?
Popularity: 63

Catalyst efficency threshold low?
Popularity: 63

What will happen if you do not replace an exhaust manifold that is leaking?
Popularity: 61

How to reset or clear check engine history light codes?
Popularity: 61

What would cause high levels of nitrous oxides in the exhaust?
Popularity: 61

What is the purpose of a exhaust silencer?
Popularity: 60

Why when you push the accelerator would your car blow a lot of smoke?
Popularity: 58

What is the different between faulty oxygen sensor and throttle position sensor?
Popularity: 58

What could be the problem when some heavy light colored smoke is seen after driving a car on a highway stopping and starting it again?
Popularity: 58

What would cause excessive exhaust while the engine is running on a vehicle?
Popularity: 57

When the EGR valve is replaced what other parts should be reaplced also?
Popularity: 55

Why would there be black stuff coming out of the exhaust pipe 4 days after an oil change with the dip stick reading below the ADD line?
Popularity: 54

Is the exhaust manifold the same as the exhaust header?
Popularity: 54

If your service engine light is on they said it was a emission problem but you changed every sensor but it still is idling very low what emmision part would cause it?
Popularity: 52

Why is your car emitting light fumes from the muffler?
Popularity: 52

What does blue smoke from the exhaust mean?
Popularity: 52

What is an evaporated emissions leak?
Popularity: 51

Would your car blow oil if it had a bad PCV Valve?
Popularity: 51

Why does your 4cl have 8 plugs?
Popularity: 51

Is it hard to replace valve seals?
Popularity: 51

What is the calculation for combustion chamber pressure at the beginning of the exhaust stroke?
Popularity: 49

What causes water condensation to come out of tailpipe?
Popularity: 48

Where is the air intake sensor?
Popularity: 46

Why excessive dense white smoke comes out from the exhaust at no loadwhen the engine is loaded the white smoke disappears why?
Popularity: 46

How does a burnt exhaust valve affect emissions?
Popularity: 44

Does higher octane produce higher co?
Popularity: 44

Besides a blown head gasket what are other possible causes of excessive white exhaust smoke or steam?
Popularity: 39

How do you fix a cracked head on the exhaust port?
Popularity: 38

Is it necessary to replace the 'flex' part of a flex pipe with another flex piece or can you use regular exhaust pipe?
Popularity: 38

How can you find out if its your valve seals or rings that are worn?
Popularity: 37

Why does water come out of A tailpipe when you crank it up?
Popularity: 37

Are car fumes dangerous?
Popularity: 37

Why do black smoke comes out from the car's exhaust pipe?
Popularity: 37

What is an oil catch can?
Popularity: 36

How many KPH will your car improve if you have a change oil and tune up?
Popularity: 36

How can you fix the hydrocarbons from leaking into the air?
Popularity: 35

If your car is blowing blue smoke and it is most likely the valve seals that are bad what is the life expectancy of your engine?
Popularity: 35

Does check engine light on mean the computers is reset to ready for emissions so i can apply for waiverafter after inspection?
Popularity: 34

Why does 94 olds bravada hesisatate upon acceleration and blows white smoke its running worse by the day about to stop running completely but idles good with a little miss in it?
Popularity: 34

How do you make the check engine light go away?
Popularity: 33

Can excessive white smoke be caused by fuel tank water condensation eg by not using vehicle for 12 months?
Popularity: 32

How can you make the exhaust sound deeper?
Popularity: 30

How do you fix a Television?
Popularity: 29

How do you make the exhaust sound deeper?
Popularity: 29

Can you swap a egr head on to a non-egr engine?
Popularity: 29

What is causing white smoke to come out of the exhaust for a few seconds when you first start your car?
Popularity: 28

What is axle-back?
Popularity: 27

What causes white smoke when vehicle is idling in cold weather?
Popularity: 27

What can you do to your motor if you drive without a flex pipe?
Popularity: 27

What is a cat-back system and how is it different from a dualed out exhaust?
Popularity: 26

What is the Best suggestion for changing metering rods or jets in a quadrajet need to lower CO emissions or any other suggestions to lower CO emissions?
Popularity: 26 | Needs Answer

When should you replace your oxygen sensors?
Popularity: 25

Little bit of white smoke that comes out of your exhaust that stays there all the time does any 1 no what it is?
Popularity: 25

Does it hurt the engine if you remove the exhaust pipe?
Popularity: 24

What does black smoke from the tail pipe mean?
Popularity: 22

What is an evaporator canister?
Popularity: 22

How will a hole in the exhaust affect fuel consumption and power output?
Popularity: 21

Which vehicle represents the overall average mpg consumption?
Popularity: 21 | Needs Answer



Help answer questions

Please click on a question to help answer it. You don't need to be an expert and you don't need to sign up for anything. You just need to give a few minutes of your time.

Even if you don't have new information to contribute, you may be able to help improve someone else's answer. This is cooperative Emissions and Exhaust Systems Q&A that is constantly being improved by like you.

Click here to browse the new exhaust and emissions systems questions or all unanswered automobiles questions.

Help answer future exhaust and emissions systems questions

Please share your exhaust and emissions systems knowledge, however humble, by helping to answer future questions. Click here to watch Emissions and Exhaust Systems so that you'll be alerted when there are new questions and changes.