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Discussion Starter · #1 · (Edited by Moderator)
I’ve got a brand new 6.0 completely bulletproof engine and everything is working no codes no oil fuel literally nothing if you saw this motor u would want to shake my hand and take ur hat off trust me every single thing on this truck is brand new interior out the problem I am having is that in park I will hold my foot on the pedal and it will just drop down in rpm about 200-500 rpms and then go back to where I have my foot positioned on the pedal I’ve have looked at oil leaks fuel ipr and vgt and I am bout to throw the flag in i have a couple tunes on the pcm but I need someone help please if you have this problems I can take a video if you would like
 

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1st, return the PCM to stock tune, se if the issue still exists.
2nd, is this a stock build, or are there oversized injectors, bigger turbo, anything like that....?
3rd, What is your fuel pressure?
 
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