What are the effects of a faulty carbon canister purge solenoid valve on a car?
2 Answers
The malfunctioning of a car's carbon canister purge solenoid valve not only increases fuel consumption but also affects the normal operation of the car's engine. Working principle of the carbon canister purge solenoid valve: activated carbon adsorbs fuel vapor, and when the car starts, the solenoid valve controls the opening of the activated carbon canister, reintroducing the absorbed fuel vapor into the intake manifold for combustion, achieving the goals of fuel saving and environmental protection. When the carbon canister purge solenoid valve is damaged, it cannot open or close the carbon canister. If the carbon canister purge solenoid valve fails to open, fuel vapor cannot enter the cylinder for combustion; if it is damaged and cannot close, remaining in a constantly open mode, it leads to an overly rich air-fuel mixture and incomplete combustion, causing most of the unburned fuel to be expelled from the car, resulting in fuel wastage and increased fuel consumption.
I've been driving for 15 years and know a thing or two about this canister purge valve failure. It controls the recycling of fuel vapors. If it malfunctions, the car often fails to start, especially during cold starts where multiple attempts are needed. The idle speed becomes unstable, fluctuating up and down, affecting driving smoothness. Fuel consumption increases noticeably due to system abnormalities causing fuel wastage – it's common to get dozens of kilometers less per tank. Emissions also exceed standards, increasing tailpipe pollution. The engine warning light on the dashboard frequently illuminates. If not repaired promptly, it may cause carbon buildup in the intake manifold and damage core engine components. I recommend car owners regularly inspect this part – replacement isn't expensive, and prevention is better than cure.
