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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

How do you replace egr valve on a 2001 pt cruiser?

To replace the EGR valve on a 2001 PT Cruiser, first, disconnect the negative battery terminal to ensure safety. Remove the vacuum hose and electrical connector from the EGR valve, then unbolt the valve from its mounting position using a wrench. Clean the mounting surface to remove any old gasket material, then install the new EGR valve with a new gasket, reconnect the electrical connector and vacuum hose, and finally reconnect the battery terminal. Start the engine to ensure the new valve functions properly.

Reaction if egr valve is bad?

If the EGR (Exhaust Gas Recirculation) valve is bad, you may experience several symptoms:

Common Symptoms

Check Engine Light:

The check engine light may illuminate on your dashboard.

Rough Idle:

The engine may idle unevenly or roughly.

Reduced Engine Performance:

You might notice a decrease in acceleration or overall power.

Increased Emissions:

The vehicle may produce higher emissions, potentially failing an emissions test.

Stalling:

The engine may stall at low speeds or while idling.

Poor Fuel Economy:

You may experience decreased fuel efficiency.

Conclusion

If you suspect a bad EGR valve, it's advisable to have it inspected and replaced if necessary to avoid further engine issues.

Eb falcon blowing black smoke and rough?

If your Eb Falcon is blowing black smoke and running roughly, it could indicate an issue with the fuel system, such as an overly rich fuel mixture or a malfunctioning sensor. Black smoke typically suggests that the engine is burning too much fuel, which could be due to a faulty fuel injector, a clogged air filter, or a problem with the engine management system. Additionally, it's important to check for any diagnostic trouble codes (DTCs) using an OBD-II scanner to pinpoint the issue. Addressing these problems promptly can help prevent further engine damage.

How much does it cost to replace the evaporate emissions system vent control circuit?

The cost to replace the evaporative emissions system vent control circuit can vary significantly based on the vehicle make and model, as well as labor rates in your area. Generally, the total cost, including parts and labor, can range from $150 to $500. It's advisable to get a quote from a qualified mechanic for a more accurate estimate tailored to your specific situation.

What does white smoke from a scooter mean?

White smoke from a scooter typically indicates that coolant or water is entering the engine's combustion chamber, which can happen due to a blown head gasket, a cracked engine block, or other cooling system issues. It may also suggest that the engine is burning oil, particularly if the smoke persists after the engine warms up. In either case, it's advisable to have the scooter inspected by a mechanic to prevent further damage.

Why is the exhaust system mounted to the vehicle body by a flexible mount?

The exhaust system is mounted to the vehicle body by a flexible mount to accommodate movement and vibrations from the engine and chassis. This flexibility allows for thermal expansion and contraction of the exhaust components without causing stress or damage to the system or the vehicle body. Additionally, it helps reduce noise and vibration transfer into the cabin, enhancing overall comfort.

What emission systems does the pcm control?

The Powertrain Control Module (PCM) manages several emission control systems, primarily including the Exhaust Gas Recirculation (EGR) system, the Positive Crankcase Ventilation (PCV) system, and the catalytic converter operation. It monitors and adjusts parameters to optimize fuel combustion, reduce harmful emissions, and ensure compliance with environmental regulations. Additionally, the PCM may control the oxygen sensors and the air-fuel ratio to further minimize pollutants emitted from the vehicle.

How do they do emissions test on cars?

Emissions tests on cars typically involve measuring the levels of pollutants emitted from the vehicle's exhaust system while it's running. During the test, vehicles are usually placed on a dynamometer, which simulates road conditions, and sensors analyze exhaust gases for substances like carbon monoxide, nitrogen oxides, and hydrocarbons. Some tests may also include an on-board diagnostic (OBD) check to evaluate the vehicle's emission control systems. The results determine if the vehicle meets regulatory standards for emissions.

How does a purge valve work in car?

A purge valve, part of a vehicle's evaporative emission control system, regulates the flow of fuel vapors from the charcoal canister to the engine intake. When the engine is running and conditions are appropriate, the valve opens to allow these vapors to be drawn into the combustion chamber, where they can be burned off. This process helps reduce harmful emissions and improves fuel efficiency. The valve is typically controlled by the engine's computer, which determines when to open or close it based on various factors like engine temperature and load.

How do you replace the exhaust manifold on a 1998 Plymouth breeze 2.0?

To replace the exhaust manifold on a 1998 Plymouth Breeze 2.0, first disconnect the battery and remove any components obstructing access to the manifold, such as the air intake and heat shield. Unbolt the exhaust manifold from the engine block, taking care to remove any remaining gaskets or debris. Install the new manifold with a new gasket, tightening the bolts to the manufacturer's specifications. Finally, reassemble any components you removed and reconnect the battery.

What causes smoke to come from dipstick?

Smoke coming from a dipstick often indicates that oil is burning in the engine, which can result from several issues, such as worn piston rings, leaking valve seals, or excessive blow-by gases. This can lead to increased pressure in the crankcase, causing oil to escape and vaporize. Additionally, overheating or contaminated oil may contribute to the problem. It's crucial to address this issue promptly to prevent further engine damage.

How does a blown head gasket affect emissions?

A blown head gasket can lead to increased emissions by allowing engine coolant and oil to mix with the combustion gases, resulting in incomplete combustion and higher levels of harmful pollutants being released into the exhaust. This can produce white smoke from the tailpipe due to burning coolant and elevate levels of hydrocarbons, carbon monoxide, and particulate matter. Additionally, the loss of pressure in the combustion chamber can lead to reduced engine efficiency, further exacerbating emissions issues. Overall, a blown head gasket negatively impacts the engine's ability to meet environmental standards.

Where can you find a vacuum line diagram for a 1974 Toyota Hilux pickup?

You can find a vacuum line diagram for a 1974 Toyota Hilux pickup in the vehicle's service manual, which is often available for purchase online or at auto parts stores. Additionally, websites like Toyota forums, enthusiast groups, or classic car restoration sites may have downloadable diagrams or user-generated content. Online platforms like eBay or specialized automotive literature retailers might also have the necessary manuals. Lastly, consider checking with local Toyota dealerships for any archived materials.

Dual exhuast why blue smoke on one side?

Blue smoke emanating from one side of a dual exhaust system typically indicates that the engine is burning oil, which could be due to a faulty valve seal, piston ring, or other internal engine issues. If the blue smoke is only present on one side, it may suggest that there’s a problem localized to that particular bank of cylinders. It's important to diagnose and address the issue promptly to prevent further engine damage. A mechanic should inspect the engine to identify the exact cause and recommend necessary repairs.

Why white smoke in 4m51 Mitsubishi?

White smoke from a 4M51 Mitsubishi engine typically indicates coolant entering the combustion chamber, often due to a blown head gasket, a cracked cylinder head, or a damaged engine block. This can lead to overheating and potential engine damage if not addressed promptly. It's essential to diagnose the issue and repair it to prevent further complications. Regular maintenance and monitoring can help catch such issues early.

How do you change the back box on mondeo estate?

To change the back box on a Ford Mondeo estate, first, safely lift the vehicle using jack stands. Then, locate the exhaust back box, usually secured with clamps or bolts. Remove the old back box by loosening these fasteners, and disconnect it from the exhaust pipe. Finally, install the new back box by reversing the process, ensuring all connections are secure before lowering the vehicle.

How do you fix an evaporative emission control system leak?

To fix an evaporative emission control system (EVAP) leak, first, use a diagnostic scanner to identify any trouble codes and locate the source of the leak. Common fixes include replacing damaged hoses, seals, or the gas cap, which can often be the culprit. After repairs, perform a smoke test to ensure no further leaks are present, and reset the vehicle's computer to clear any error codes. Finally, take the vehicle for a short drive to confirm that the check engine light does not reappear.

How many catalytic converters does the 04 Kia Amanti have?

The 2004 Kia Amanti is equipped with two catalytic converters. One is located on each side of the vehicle, as it has a V6 engine configuration. These converters are part of the exhaust system, helping to reduce harmful emissions.

What President's wife smoked a corncob pipe?

The President's wife who famously smoked a corncob pipe was First Lady Grace Coolidge, married to President Calvin Coolidge. Grace Coolidge was known for her unconventional behavior, including smoking a corncob pipe in public and participating in Native American rituals. Her actions were seen as a departure from traditional First Lady roles and garnered both criticism and admiration.

Why is white smoke coming from air vents when I shunt down the cooling effect on my car AC?

White smoke coming from the air vents when you turn off the cooling effect of your car's AC system is typically caused by condensation build-up within the system. When you turn off the AC, the cold air stops flowing through the vents, causing the moisture in the system to evaporate and be released as white smoke. This is a normal occurrence and is not usually a cause for concern. However, if the smoke persists or is accompanied by unusual odors or sounds, it may indicate a problem with the AC system that requires further inspection by a professional mechanic.

Where is the in line spout connecter?

Close to Distributor you will find it protruding from a wiring harness . You simply pull on it to remove for timing proceedures.