Skip/hiccup/miss??? At idle

[Motorboy8769]

I was letting the truck idle thismorning when I go to work after my very short commute. Not for long just a couple min. But it would hiccup slightly almos like a miss and when it did it my rpm would gor from 650's to 660's and the truck would rock a bit it only did it for a split second then idles fine for maybe 30-45 seconds then another skip..... I ran the codes the only code that I have is a p1000 could that be it? It didn't say it was a miss though????

Thanks in advance

[03silvertj]

Have you done your tune/DPF delete yet?

If not you could have been in regen. While in regen my truck will do that sitting at a stoplight. However if you were in Park, it would have stopped the regen. So your other option is that it could have been the AC compressor kicking on and off.

[Motorboy8769]

I have done the dpf cat delete and have the canned sct performance tune on the truck until next Monday. I had the defroster on no ac though. Could it have been the heater? It only spiked rpm for a second then came back to normal in consistent intervals