EGR stands for Exhaust Gas Recirculation. If your EGR valve is not functioning properly it can result in poor performance, stalling, rough idle, and/or diminished fuel economy.
EGR's sole purpose is lowering emmissions- most importantly NOx. In standard combustion N2 does not react, O2 reacts with the fuel to form CO2 and H2O. However, at higher temperatures, around 2500 F, N2 begins to react with O2 to form NO and NO2- NOx, which then recombines in the atmosphere to form smog. By running some exhaust gas into the cylinder again you raise the specific heat of the gas mix- H2O has the highest specific heat known- thereby cooling the combustion reaction and significantly lowering NOx emmissions. EGR lowers power at full throttle, and can stall your car at idle, or cause a very very rough, shaky idle. Thus it should turn off at these points, which is the purpose of the valve. If the valve has issues, and leaves EGR on, you will stall/idle roughly, and lose top end power. If EGR is off you will just have more emissions. In fact, many people before the system was improved would simply disable EGR, but these days it doesn't make a difference. So if it's stuck on, or you wanna feel good about the environment, you need it fised, otherwise, it shouldn't harm your engine.
where is the heater control valve for a 1997 ford expedition
The 2002 Ford Expedition has 16 valves.
The 2002 Ford Expedition has a V8 engine.
The 2002 Ford Expedition is a gas-powered vehicle.
The 2002 Ford Expedition has a 4-speed automatic.
Ford Expedition & F150s have a common problem. Usually it will be a collapsed vacuum hose. Other thing could be your idle control valve.
it's up under the manifold on the drivers side. Hunnybunny
The 2002 Ford Expedition has a 19.1 degrees angle of departure.
The curb weight of the 2002 Ford Expedition is 5468 lbs..
The 2002 Ford Expedition has single overhead cam (SOHC).
The 2002 Ford Expedition has a 22.3 degrees angle of approach.
The 2002 Ford Expedition runs on regular unleaded.
The 2002 Ford Expedition is 17 ft. 1.8 in. (205.8 in.) long.
The height of the 2002 Ford Expedition is 6 ft. 4.5 in. (76.5 in.).
The maximum payload of the 2002 Ford Expedition is 1532 lbs..
According to the 2002 Ford Expedition Owner Guide : ( the wheelbase is 119.0 inches )
The 2002 Ford Expedition has 64.2 in. of rear shoulder room.
The 2002 Ford Expedition has 39.8 in. of rear head room.
The 2002 Ford Expedition has 38.5 in. of rear leg room.
The 2002 Ford Expedition has 63.4 in. of front shoulder room.
The 2002 Ford Expedition has 39.6 in. of front head room.
The 2002 Ford Expedition has 63 in. of front hip room.
The 2002 Ford Expedition has 41.1 in. of front leg room.
The 2002 Ford Expedition has 62.3 in. of rear hip room.
The gross weight of the 2002 Ford Expedition is 7000 lbs..