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EGR valve the top of box on top of the inlet manifold of a Saab H engine in a 1987 Saab 90. In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NO x) emissions reduction technique used in petrol/gasoline, diesel engines and some hydrogen engines. [1]
An empty boat trailer. A boat trailer is designed to launch, retrieve, carry and sometimes store boats. As of 2024, the cost of a boat trailer can be anywhere between $700 to $8000, depending on the size and number of axles the trailer has. [1]
The crankcase air outlet, where the PCV valve is located, is generally placed as far as possible from the crankcase breather. For example, the breather and outlet are frequently on opposite valve covers on a V engine, or on opposite ends of the valve cover on an inline engine. The PCV valve is often, but not always, placed at the valve cover ...
Diesel engine runaway is an occurrence in diesel engines, in which the engine draws extra fuel from an unintended source and overspeeds at higher and higher RPM, producing up to ten times the engine's rated output until destroyed by mechanical failure or bearing seizure due to a lack of lubrication. [1]
The older spring based systems had performance issues, and an insufficiently well designed and implemented system can be nonfunctional and undrivable. The problem with these spring based systems happens as follows: As the towing vehicle brakes, the trailer travels forward, sliding the mechanism, for a distance before trailer braking begins.
“The boat finally came off plane and drifted about 30 feet from the helicopter’s rotors. That pilot saved the day. That boat would not stop and would have torn through the course.
Although the IAC is supposed to last the vehicle's lifetime, various reasons may cause it to fail/malfunction prematurely. The most common failure mode is partial/complete jamming of the actuator (due to dirt/dust or even oil) where it cannot be smoothly controlled. The result is an engine that fails to maintain idle RPM and frequently stalls.
This is most likely to occur on a carbureted engine in cold weather, after a running engine has been shut off briefly before being restarted. Doing so can cause the choke valve to configure the mixture for a cold engine start, despite higher actual temperatures, resulting in an overly rich mixture and flooded engine.