High ICP
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Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
High ICP
I had a p1211 code when I first got Torque Pro hooked up. I figured it was just because I'd done a couple WOT runs and the HPOP just can't quite keep up with the injectors. I was told this might happen when I ordered the injectors from Gearhead. I also noticed that my ICP peaked at around 3600 during one of these runs. I don't have it logged, but I'm certain it was up that high.
The code hasn't returned, but I haven't been running it too hard either. I don't quite know what to make of the ICPs actually being that high. From looking at a bunch of Rich's graphs his doesn't really get past 2800 or 2900. Is this an incorrect reading? Do I need to worry about anything?
The code hasn't returned, but I haven't been running it too hard either. I don't quite know what to make of the ICPs actually being that high. From looking at a bunch of Rich's graphs his doesn't really get past 2800 or 2900. Is this an incorrect reading? Do I need to worry about anything?
Posting Guru
Joined: Sep 2014
Posts: 2,404
Likes: 3
From: Asheville-where weird is
I had a p1211 code when I first got Torque Pro hooked up. I figured it was just because I'd done a couple WOT runs and the HPOP just can't quite keep up with the injectors. I was told this might happen when I ordered the injectors from Gearhead. I also noticed that my ICP peaked at around 3600 during one of these runs. I don't have it logged, but I'm certain it was up that high.
The code hasn't returned, but I haven't been running it too hard either. I don't quite know what to make of the ICPs actually being that high. From looking at a bunch of Rich's graphs his doesn't really get past 2800 or 2900. Is this an incorrect reading? Do I need to worry about anything?
The code hasn't returned, but I haven't been running it too hard either. I don't quite know what to make of the ICPs actually being that high. From looking at a bunch of Rich's graphs his doesn't really get past 2800 or 2900. Is this an incorrect reading? Do I need to worry about anything?
I think this rules out a Stinky spike on my truck. How does that compare to your experience?
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
The ICP on this truck will sometimes peak at around 3500 PSI on a WOT run. I have not logged it to see what IPRDC% is being commanded when it peaks this high but it is definitely at about 2400-2600 rpms, FIPW is below 2.2ms and the peak happens when I am pulling a heavy load up a 7% grade and when I am getting into the throttle way before I let off the throttle. The HPOP will maintain 3000+ all the way up the grade....
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Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
As soon as I get driveshaft back together, I'm going to try to log data.
I've read that thread before. Still trying to wrap my head around it. Most of it makes sense to me but I don't feel like I get all the finer points.
I've read that thread before. Still trying to wrap my head around it. Most of it makes sense to me but I don't feel like I get all the finer points.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Nutshelling it - IPR is not unlike putting your thumb over a garden hose. Take a hose and adjust the water flow to where the water comes up about 1/2 to one inch above the nozzle - that is a finite amount of flow available. Move your thumb just enough to let a little water out and pressure builds (this is ICP) - shooting the water a greater distance. Letting your thumb off completely allows the pressure to escape, and the water just gurgles out. ICP powers the injectors... which is all about atomization - it takes high pressure to do it right.
FIPW is akin to putting a Y in the garden hose and bleeding some or all of your pressure. If the FIPW isn't too long, the thumb on the hose can adjust a bit to keep the pressure up. There is a delicate balance between increasing the flow out that Y and decreasing the pressure beyond what the IPR can correct - a good performance tune strikes that balance. A long FIPW just drains your ICP out the Y... and you get soot, high EGTs, and diminished performance.
FIPW is akin to putting a Y in the garden hose and bleeding some or all of your pressure. If the FIPW isn't too long, the thumb on the hose can adjust a bit to keep the pressure up. There is a delicate balance between increasing the flow out that Y and decreasing the pressure beyond what the IPR can correct - a good performance tune strikes that balance. A long FIPW just drains your ICP out the Y... and you get soot, high EGTs, and diminished performance.
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