Ford Freestar Egr Valve
Symptoms of a Ford Freestar EGR Valve Near Surrender
The Exhaust Gas Recirculation (EGR) system is a part of the exhaust system of your Ford Freestar that is made to regulate the amount of exhaust gas returned to the intake manifold. The valve in the EGR is responsible for that task. EGR valves are extremely important because they give the vehicle the ability to be fuel-efficient and decrease pollution, both at the same time. Consequently, when something goes wrong with the valve, it affects the car in two ways. It's a Double Whammy to be exact. Therefore being able to understand symptoms of a uncooperative EGR valve is significant.
Erratic release of exhaust gas
The EGR valve sometimes gets stuck because it is not receiving the proper signal from the onboard electronic control unit (ECU) or the opening becomes dirty and crusted with carbon buildup. This kind of failure usually stems from the EGR valve being stuck open or close. Whenever the EGR valve fails to operate smoothly, the regulation of exhaust gases become irregular and this will lead to other problems with the exhaust system.
Poor engine performance
A clogged EGR valve can make the engine idle roughly and possibly lose power. Because of these, you may experience a drop in fuel economy. The loss of power is common whenever the valves are stuck open because hot exhaust gases enter at will into the combustion chamber. This occurrence displaces the air that is used to burn off the fuel.
Service engine indicator lights up
This is prevalent with electronically controlled EGR valves that are positioned by the ECU with a sensor. If the ECU and the valve fails to communicate with each other, it will cause the check-engine light to fire up. Most of the time, an EGR valve that is left open trips the check-engine light after the car warms up. When the opposite happens, the EGR valve is shut off.
High concentration of pollutants
The abnormally high concentration and presence of toxic pollutants such as hydrocarbons can translate to a failed EGR valve. EGRs are primarily designed to hamper the formation of pollutants, specifically nitrogen oxide. A sure sign of EGR failure is when an emissions tester detects a spike in production of nitrogen oxide.
Strong odor of gasoline from the tailpipe
In the vehicle's attempt to compensate for the high combustion chamber temperature, the car injects more fuel into the mix or rearranges the ignition timing. These actions tend to produce excessive carbon monoxide and unburnt hydrocarbons to exit the broken EGR valve. And this manifest through a strong odor of gasoline, mainly because the fuel wasn't completely combusted. Inhalation of these fumes are dangerous to any living being.