here's an interesting story with a oops at the end

[7.3HeavyHauler]

well today started off pretty good went to a wedding and when we got home, the electric was off, a couple got into a fight and the guy thought it was in reverse but it was in drive so he took out a telephone pole...how true that is I don't know but you could clearly see the pole was leaning...anyways this happened at 2pm. we got back from the wedding at 5pm, so me and my wife are socializing with the neighbors and played a game of cornhole, then I got the bright idea to do a little maintenance on my truck, remembering the video about the ICP, I then decided that I would tackle this figuring I'd be done about the same time the power company would, well go the sensor off not much of a problem there, but the tube line on the other hand was a royal pain, took me about an hour to break it loose from the exhaust manifold, yep hadn't been cleaned in oh say the days of Moses, anyhow finally got it out and noticed a hole in the tubing, so now its 1am and the power is finally back on, so heres my questions:

1. in the youtube video the guy says theres a rubber diaphragm or so he thinks there is and not to damage it...I looked in mine and I do not have a rubber diaghragm, so is it broke?

2. what does the icp do? this hole in the tubing has apparently been there since i've owned the truck as you can tell by the pics and this being my first diesel knew nothing about this, I'm going to replace it but just wondering how vital if any the sensor is

[JSchuricht]

ICP=Injection Control Pressure, it is a sensor in the left head that measures the HPOP output.

The tube you have pictured looks like the tube to the EBP or Exhaust Back Pressure sensor. It measures the backpressure and helps the computer determine what to do with the EBP valve which effects warm up and can kill your mileage if it closes at the wrong time.

[7.3HeavyHauler]

Lucky me then, I removed the EBPV when I rebuilt my turbo

[jesilvas]

Tht EBP sensor also determines fueling too.

I made my Samsung SGH-I997 send this.

[Zaairman]

I'd get a new EBP tube and clean the EBP sensor. That's not your ICP.

For now, I'd go to Lowes/Depot and pick up a 1/2" (or is it 1/4"?) NPT cap and cap that hole on the header.

[7.3HeavyHauler]

My bad tryin to do 2 things at once, but yeah I like the idea of blocking it off seein's how it's about useless since I removed the valve, now it's time for that ICP sensor

[jesilvas]

You think it's useless. I'd still run it.

[7.3HeavyHauler]

Lessoned learned that tube may not necessarily need to be there but that sensor does, I drove it for a few miles that way and it shifted all kinds of horrible and got some really horrible gas mileage, I got one from a dealer and now it runs like a raped ape.