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  1. 1.9JTD peaks at 1bar boost ? faulty gauge?

    Alfa 147, 156 & GT
    Hello everyone, I've recently installed a boost gauge in my 156 1.9jtd 8v 115hp, usually the boost pressure reads 2 bar in multiecuscan at full load, but the gauge that I installed only reads about 1bar at full load high RPM. I should mention that my boost gauge(brand new) starts making a...