Signs Telling Your Audi A4 Purge Valve is Bad
Your Audi A4 purge valve is the part that releases fuel vapors from the charcoal canister into your engine so they can be recycled. This contributes to your car's fuel economy as well as clean emission. Your purge valve is easily affected by dirt and contaminants, causing it to get stuck on either the closed or opened position. When this happens, a lot of issues associated to fuel combustion would arise. That is why you need to know when you have to check this part. This would prevent the more serious engine problems that could result from neglect of a purge valve failure.
Damaged spark plugs
A noticeable symptom of a bad purge valve is damaged spark plugs. Since the valve is clogged or faulty, fuel vapors are not released into the cylinder of your engines. When this happens, fuel is not mixed with air properly. This results in a rich fuel mixture which burns and wears your spark plugs in the long run. When this happens, it is advisable to replace your spark plugs and your purge valve immediately.
When your purge valve refuses to release the fuel vapors inside the charcoal canister, the whole of your car's emission system is affected. Pressure increases inside the system, causing gaskets and seals to blow up. These rubber materials may be installed securely and tightly, but due to the high pressure, they are the first parts to give in. When these seals blow, oil sprays out from the emission system. This could lead to more engine problems if left unfixed.
When your engine misses out or runs rough, your Audi A4 purge valve may be failing. Because the part does not release the fuel vapors, they build up inside the charcoal canister. When this condition continues, excessive fuel vapors would be pushed back into the engine cylinders. This causes your engine to choke and miss. As a result, abnormal fuel combustion occurs wherein your engine seems to struggle.
If you just had your car emission-tested and failed, it may be caused by your clogged Audi A4 purge valve. When this happens, the fuel vapors from your charcoal canister are not recycled for combustion. These vapors are released by the exhaust system. As an effect, large amounts of carbon are emitted.