have a 05 with new turbo, air dogg system, intake, exhaust, egr delete, bkue spring mod, and sct tuner. thing breaks up and studders real bad around 55mph and when you lay into it good. fuel pressure is constantly moving around at idle between 58-62 psi and drops to 46-50 psi when wot. programmer is on can tune at level 4 out of 5. any thoughts ?
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