* Increased Emissions: The primary function of the smog pump is to inject air into the exhaust system to help oxidize hydrocarbons and carbon monoxide, reducing emissions of these pollutants. A malfunctioning pump means these pollutants are released in higher concentrations, leading to failed emissions tests and contributing to air pollution.
* Higher Exhaust Gas Temperatures (EGTs): Without the extra air injected by the pump, exhaust gas temperatures can rise significantly, especially during startup and low-speed driving. This increased heat can damage catalytic converters, oxygen sensors, and other exhaust components.
* Premature Catalytic Converter Failure: The higher EGTs directly contribute to the premature failure of the catalytic converter. The catalyst material can overheat and become less effective or even melt, requiring expensive replacement.
* Check Engine Light (CEL): Most modern vehicles have sensors that detect problems with the smog pump's operation. A malfunctioning pump will usually trigger a check engine light, indicating a problem that needs attention.
* Reduced Engine Performance (in some cases): While not always the case, a failing smog pump can indirectly affect engine performance if the higher exhaust temperatures cause problems elsewhere in the system. For instance, a damaged catalytic converter can restrict exhaust flow, leading to reduced power.
In summary, a non-working smog pump is a serious issue that can lead to increased pollution, damage to expensive exhaust components, and potential engine performance issues. It's crucial to repair or replace a malfunctioning smog pump promptly.
