With the help and advice of Mr. Cheezit I got this nasty sucker replaced. I was having unattended acceleration when cold and narrowed it down to IPR DC% jumping like a kangaroo. It would go from 21.1 to 66% on it's own.

Getting to it with a regulated return installed presented it's own challenges. This picture is AFTER I washed the screen with brake cleaner. There wasn't any metal but it sure was nasty. The new one is standing beside it for comparison. I installed the 05 and up in my 04 engine and it's working perfectly.

 

I know you dont slack on oil change intervals so what causes the IPR to get like that ?

 

Oil loads up with soot and gradually deposits on the fine screen.

 

The IPR really isn't that terrible hard to get to. A guy should probably pull the IPR to clean the screen anytime he's messing around back there.

 

Getting to mine requires removing the y-pipe and a regulated return line in addition to the regular stuff, so it took me a little longer. Not to mention not having the proper wrench/socket that I had to manufacture

I'm sure you're quite right about what's clogging my screen. Bigger injectors and quite a bit of blowby contribute to VERY nasty oil in my truck. That picture was after I'd already washed it from the back side with brake cleaner, but I haven't scrubbed it yet.....

 

Wow! That screen looks very fragile, what are you going to use to scrub it?

 

They are very fragile, but I have a very soft baby's tooth brush that I'll use AFTER an extreme dose of brake cleaner into a clean container although carb. cleaner might be a better choice to see if it's carbon based. Come to think of it.....I need to get it back out of the trash--LOL.

 

I havent messed around back there in over a year, so i dont remember having to disconnect the y-pipe. My bad!

 

I had to disconnect the y-pipe to be able to move the fuel return line. Not a typical truck. I think the actual IPR replacement on a stock truck is a fairly "simple" repair with the correct tools.

 

i to am having rpm increase at idle and noticed ipr jumps from 26% to38% or so and i plan on changing theipr is there a reason or advantage to using 2005 and up unit as i to have 2004 6.o thanx for any info

 

Tim I didnt think a 05 IPR would fit an 03-04 but since you have done it could I do it to my 03

I like the design of the newer IPR on the screen micron rating looks like they will Def last longer before plugging up

did you have to change the pigtail or anything like that

 

npccparts Are you running an oil bypass filter? Might help with the soot in the oil problem. I use the Amsoil bypass. Filters down to 5 microns. FWIW

 

i have a buddy that runs the bypass system also he says it helps a ton but for the cost of the filter im pretty happy with the reg system

 

I'm running the 05-07 IPR in an 04 to see if it would work and it does just fine. Its "funny" you brought this problem up. I stopped at a highway crossing and when I hit the throttle, the truck spun a set of 35" mudders across the highway and I thought I was in a runaway situation when everything went back to normal. After that for about a week my truck would surge very bad at idle and it would kill the engine backing up at idle. But if you gave it a little throttle everything was fine. No codes whatsoever. Assuming it was the 05+ IPR in an 04(even though it had been running fine for weeks) I bought the "right" IPR for my application. When I went in to swap IPRs, after removing the degas and the turbo inlet pipeing, I saw that my ground wire going to my IPR was pinched and rubbed through because it was smashed between my FICM bracket and the valve cover. Fixed the wire, didn't pull out the 05+IPR, and truck went to running as normal. The ground wire grounding was closing the IPR giving maximum oil pressure to the injectors even at idle. I could see having a IPR screen stopped up doing the same, no oil pressure bleeding back to the crankcase. It would be like running with a IPR block off tool installed.

 

I couldn't see any physical difference except the screen and I had it on good authority from someone not on this forum that interchanges them quite often that it would work just fine. Since the 03 and 04 motor use the same IPR I don't know why you couldn't Benny.

I didn't change the pigtail but I'm still having a surging problem, although not nearly as violent as it was, so I'm going back in to check the harness carefully because it looks pretty ragged. I'm not getting the huge IPR surges from 25-66%. They're more in the 25-40 range and they only happen when the oil temp is under 165. After the truck is warm it never happens. I'll do a little data logging with the dashdaq this morning to see if I can catch what it's doing.