Hi guys I ask you a question that has me intrigued, this morning I made a EGR off on a fiat 500 1.3 mjet 75hp, file ok I write, in the diagnosis of the egr off a percentage of 3%.. so far everything is ok.. then, given that in this car, I removed the intake manifold and the egr valve to clean them, remove the velocity stack inside the manifold by putting a cap on and leave the tube that leads from the valve open, with surprise I noticed that the egr valve still works, in fact, the minimum is to pass the exhaust gas by accelerating closes.. now I wonder cm is at work, and in the diagnosis port, the valve is closed?? But the traditional method work??