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You will have to tell whoever maps it that you are running a Lectron valve though and not an amal valve......(the Escos uses a different boost control valve that works differently to the sierra one)
as for the amal valve i have used a sierra one on my escort st one point and if worked just the same as the escort one.am sure stu said that they work in a different way and it should not have worked and the chip with the sticker on it says stg3 but cant see it in photo thanks guys