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l have dawes set up , needle valve, egr . etc. My patrol has been running fine last few years. Last week i realised my Boost was lower than usual . I though it was probably need adjustment. I stretched the spring and it was set fine back to normal. A few days later , Im struggling to get over 10Psi , with crap fuel economy. I tried to stretch the spring again. Didn't work , I also ordered some more heavy duty springs, still couldnt get past 10psi.. I tried another Dawes valve, still struggling to reach 10psi. I played around with the needle valve, the actuator level moved .
I'm thinking maybe the wet weather had something to do with it. I couldnt find any obvious boost leaks .
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