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hesitation on accel f550

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cutomer camplaint is a hesatation on accel. it acts like a stuck vgt vain. ran eec test no memory codes, koeo pass, koer p1408. the egr valve and dpf were replaced 2 months ago. I have checked egr valve and has fuel travel. i checked press pids and all within .2 psi. i ran egr system test on diagnostic sheet and passes. i have also removed and inspected ebp senor and ran wire through ebp tube. i have also removed air inlet to check low pressure turbo, there is no signs of contact with housing, but i think it doesn't spin as freely as it should. looking for suggestions before i pull piping to check hp turbo.

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