First starting my truck it idles fine then hiccups and almost cuts out then goes back to normal and does it a couple times only when its cold though. I had a crank sensor code before and I put a new one in and it worked for a few months but now its doing it again and no code. any ideas ? Thanks

 

Mine on high idle its really noticeable but its usually when the a/c pump kicks in or the grids draw on the truck. I can watch my rail pressure gauge jump when it does it. Never thought it to be an issue since its always done it for me and runs fine otherwise

 

CPS or CSS would be my guess.