6.0 RPMs jumping randomly?

[nater22]

04 6.0 with 150,000 mi. the RPMs will jump up & down at idle or while driving without a load randomly. It is not doing it all the time though. If anyone would have an idea what would cause this would be much appreciated! It is bone stock. Had ECM reprogrammed at 40,000, FICM replaced at 102,000, head gasket & bolts replaced at 130,000, EGR delete kit at 130,000, & high pressure oil pump replaced at 135,000. If any of this helps. Seldomly tow with this truck anymore. Thanks again for any help!

[a2elvis]

Kinda sounds like ICP problem... Poss bad ICP sensor or wiring to the sensor?

[justinmix]

Originally Posted by a2elvis

Kinda sounds like ICP problem... Poss bad ICP sensor or wiring to the sensor?

I agree, sounds like a high pressure oil issue. I'd start with checking ICP readings while it's acting up. Probably is either a biased or screwed up ICP sensor or wiring, or an IPR issue.

[nater22]

Thanks guys I'll start there. It actually was acting different today. It is missing after it seems to get to operating temperature & when coming up to a stop after letting off throttle it sounds like it is going to die & then catches back up. Plugged it in last night & no codes came up. Put a data reader on it last night & ran it around today & somehow it deleted any info on the reader.