It stands for Exhaust Gas Recirculation tube.
It is called the egr tube.
that my friend is the tube that goes from the exhaust manifold to the egr valve make...
To replace the EGR tube on a 1996 Cadillac STS, first ensure the engine is cool and disconnect the negative battery terminal. Remove the EGR valve and any mounting bolts or brackets securing the EGR tube to the exhaust manifold. Carefully detach the old EGR tube, clean the mounting surfaces, and install the new tube, securing it with the bolts. Finally, reattach the EGR valve, reconnect the battery, and start the engine to check for any leaks.
To replace the EGR tube on a 2007 Dodge Dakota, first, ensure the engine is cool and disconnect the battery. Remove any components obstructing access to the EGR tube, such as the intake manifold or heat shield. Unscrew the old EGR tube from the EGR valve and the exhaust manifold, then install the new tube by securing it to both connections. Finally, reassemble any removed components and reconnect the battery.
EGR sensor ( gas temperature sensor ) is monted near the EGR valve, which is install into the EGR tube.
You have to remove the egr tube, vacuum source and two bolts. the tube can be quite difficult. Generally the DPFE sensor on Fords is the cause of an EGR problem though.
The EGR valve and electrical transducer should be replaced at the same time as they are matched. Remove EGR transducer from the air inlet duct. Disconnect vacuum supply tube from EGR transducer solenoid. Remove air inlet duct. Remove EGR tube to EGR valve screws. Remove EGR valve mounting screws. Remove EGR valve and transducer. Clean gasket surfaces. Discard old gaskets. If necessary, clean EGR passages. Loosely install EGR valve with new gaskets and finer tighten EGR tube fasteners. Tighten tube fasteners to 95 in lb, tighten EGR valve mounting screws to 200 in lb. Install air inlet duct. Connect vacuum supply tube to solenoid. Attach electrical connector to solenoid. Install EGR transducer onto air inlet duct.
Plugged egr tube or a failed egr valve.
EGR vavle is clogged go to "you tube" search "clean EGR "
egr, low flow problem.clean out egr and tube, of carbon.
look at the focus fanatics forum... this thread should help http://forums.focaljet.com/spi-tuning/503448-egr-tube-sheared-header.html
It's called the EGR tube.