How Does An EGR System Work?
Your Exhaust Gas Recirculation (EGR) system funnels some of your exhaust fumes back into your combustion chamber in order to reduce its operating temperature and produce fewer nitrogen oxides. The exhaust fumes that enter your combustion chamber are cooled before entering, for the hotter a diesel engine gets, the more nitrogen oxides it produces. EGR systems are very effective emissions control systems and are found on almost every heavy-duty diesel truck on the road.
What If My EGR Valve Gets Stuck Open
Due to carbon buildup around your EGR system gaskets, the valve itself may get stuck open. This valve is responsible for controlling the flow of exhaust fumes and is often regulated by flow sensors. If this valve is stuck open, far too much exhaust will be funneled into your combustion chamber. This drops your operating temperature far too low and will likely cause a vast array of performance and reliability issues. Common symptoms include hard starts, stalling, extreme power loss, and poor fuel efficiency.
How Does a DPF Work?
Diesel Particulate Filters (DPFs) are designed to capture soot and other diesel particulate matter. Your DPF is connected directly to your exhaust piping, meaning all of your engine’s exhaust will flow through it before exiting the vehicle. Since your DPF’s capacity is not infinite, it needs to be cleaned every so often. Some modern heavy-duty trucks have DPFs with self-cleaning modes, whereas others need to be cleaned by a mechanic manually.
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