What causes gray smoke from exhaust?
Blue/gray exhaust smoke means there’s likely an oil leak and your engine is burning oil. Time to have a qualified technician check things out. The leak could be caused by several issues like leaking valve seals, damaged piston rings, or worn cylinder walls.
What color exhaust emitting from a vehicle’s engine indicates an excessively rich fuel mixture?
Black smoke
Black smoke is an indication that your air-fuel mixture is running rich.
How much does a Volkswagen Jetta exhaust gas recirculation cost?
Upfront and transparent pricing. Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM. Volkswagen Jetta Exhaust Gas Recirculation/EGR Valve Replacement costs $448 on average. What is the Exhaust Gas Recirculation/EGR Valve all about?
What does it mean when your car has white smoke coming from the exhaust?
White smoke. Some white exhaust smoke is normal, especially when you first start the car. Condensation can turn to vapor, providing what looks like white exhaust. But excessive white smoke likely means coolant is leaking into the engine combustion chambers.
Why does my car’s exhaust smell like gas?
The fuel injectors or carburetor on your vehicle regulates fuel flow into the combustion chamber. If an injector or carburetor begins leaking fuel into the combustion chamber, it creates a rich running condition. This results in a rough idle and unburned gas making it into the exhaust, creating a gasoline smell in the exhaust.
What happens when exhaust gas recirculation goes bad?
Most engines require exhaust gas recirculation to meet emissions standards. If the EGR valve has gone bad, the car will not pass emissions. During the EGR valve replacement, your mechanic should also inspect the vacuum hoses connected to the EGR valve. If the vacuum hoses are cracked (leaking), the EGR valve will not function properly.