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Icp duty cycle

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Old Mar 16, 2015 | 04:22 AM
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Icp duty cycle
Correct me if I'm wrong but i read somewhere that icp duty cycle should be from 23 to 27. Well mine is usually at the lower end at 23 but the past few days I've seen 22 randomly then it will go right back to 23. Is this something to be concerned about? My ICP is good and I also put a canned street tune on it not sure if that could be effecting it or not any ideas?
 
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Old Mar 16, 2015 | 04:26 AM
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I'm assuming you are talking about IPR duty cycle % at idle, not ICP pressure. 21% is rule of thumb for me. If you see it getting higher at idle, say 35%, then more than likely the system is developing a leak.
23% is no worry.
 
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Old Mar 16, 2015 | 06:05 AM
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Thanks for the quick reply. So what does happen when it drops below 21%
 
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Old Mar 16, 2015 | 07:42 AM
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Useually you will not build to the 500 psi minimum and wont start.
A tuner modifies the pcms base factory values so who knows what may have been changed.
 
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Old Mar 16, 2015 | 11:13 AM
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Just checked my tuner again and it says icp duty cycle is this different the ipr duty cycle and should I be seeing anything at koeo for injection control pressure?
 
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Old Mar 16, 2015 | 11:29 AM
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No you should get no actual pressure until the engine is rolling over turning the pump.
There are some voltage reading but I do not remember what voltage.
 
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Old Mar 16, 2015 | 11:31 AM
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Ok I am getting an icp of 1.69
 
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Old Mar 16, 2015 | 01:16 PM
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22-23% is fairly standard. I have a couple custom tunes that will run 24-25%.

21% is normal, but on the low end.

Bone stock I would start questioning things are iffy when idle IPR nudges above 25%

Josh
 
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Old Mar 16, 2015 | 05:31 PM
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Ok got it usually stays at 23 24 and only a few times have I seen 22. Thanks for the help
 
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Old Mar 16, 2015 | 06:00 PM
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The icp is a pvt type sensor, it does not accuate anything.
But as far as the rest everone has awnsered.
 
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Old Mar 16, 2015 | 06:37 PM
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Originally Posted by Bullitt390
22-23% is fairly standard. I have a couple custom tunes that will run 24-25%.

21% is normal, but on the low end.

Bone stock I would start questioning things are iffy when idle IPR nudges above 25%

Josh
Josh is this at operating temps Or all the time?
 
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Old Mar 16, 2015 | 09:25 PM
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Those numbers should be hot idle.
ipr% will be as high as 28% when cold. It should start to drop as it heats up.
 
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Old May 21, 2019 | 01:27 PM
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I would like to know if my readings right

First time owning a 06 6.0 Powerstroke I’d like to know if my readings are correct (sct x4)
eot
injector control pressure
icp
vgt’s
 
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Old May 21, 2019 | 01:35 PM
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Originally Posted by Junior Anthony

First time owning a 06 6.0 Powerstroke I’d like to know if my readings are correct (sct x4)
eot
injector control pressure
icp
vgt’s
SCT has it mislabeled. The 21% you're seeing is actually IPR reading.
At a hot idle with 21% IPR and 585 psi ICP you're engine is dead on the norm.

Here is a readout of normal hot idle readings.
 
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Old May 21, 2019 | 03:10 PM
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Are those readings on idle or wot?
 
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