Located smack dab on your cars intake manifold, an EGR [Exhaust Gas Recirculation] valve functions by sending exhaust gas back into the combustion chamber as exhausted air is much hotter than intake air. By bringing warmer gas into the combustion chamber, your engine operates much more cleanly and efficiently.
Like any part, your Ford EGR valve or Toyota EGR valve is subject to getting clogged with dirt or crud. A clogged unit may cause your car to stall, hesitate, or idle roughly. Sometimes, simply cleaning the EGR valve with a product like STP carburetor cleaner will resolve the problem. Still, if you take your car in for its MV inspection and the diagnostic tests shows that your EGR valve is not working, you will fail inspection and be forced to swap out the device before bringing your car back in for a follow up inspection. What a hassle, but something you just dont want to forget about.
Prices on replacement EGR valves are all over the place: some parts are reasonably priced while others will cost you a mint. Your Ford or Toyota dealer will charge you a mint if you purchase one through their parts department, as buying through any dealer can quickly turn...