ICP pressure - Ford Powerstroke Diesel Forum
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post #1 of 18 Old 01-28-2011, 05:48 AM Thread Starter
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ICP pressure

I have read on here but haven't found any definite answers so help me out please. If I have read between the line correctly the ICP pressure at idle (early 99 7.3) should be about 700 psi and at wot it should be 2400 to 2600 for ok and 2600 to 2800 for the best. This sound about right?

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post #2 of 18 Old 01-28-2011, 05:58 AM
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My HPOP gauge on my 01 reads 400psi at idle and will spike to 3100psi before setteling at 2800psi when I'm on the pedal. Thats with a stock 17* pump, IIRC the e99 has a 15* pump.

2001 F-250, 6 speed trans, BDP Tunes, Autometer Ultralite gauges
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post #3 of 18 Old 01-28-2011, 06:01 AM Thread Starter
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I have a 17* from Terminator in the mail as we speak My truck has been acting funny so I was going to get some pressure readings now and then after the new pump.

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post #4 of 18 Old 01-28-2011, 06:34 AM
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My ICP is about 600 at idle and goes from there.

Anywhere from 2600-3000 at WOT is acceptable. Your more concerned with duty cycle...

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post #5 of 18 Old 01-28-2011, 07:03 AM Thread Starter
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Explain duty cylce so I know I am on the same page as every one else please.

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post #6 of 18 Old 01-28-2011, 03:44 PM
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Quote:
Originally Posted by justinlogue5_0 View Post
I have read on here but haven't found any definite answers so help me out please. If I have read between the line correctly the ICP pressure at idle (early 99 7.3) should be about 700 psi and at wot it should be 2400 to 2600 for ok and 2600 to 2800 for the best. This sound about right?

I posted about a week ago on some AE readings with no replies. My E99 ICP readings seem to be all over the place at idle it fluctuates from 461-502 and WOT i have hit high 2800's but usually between high 2400'S to high 2600's

ICP Duty cycle at idle 8.98 jumps to 9.37 with nothing in between.

I've been searching for acceptable AE Perdel readings(for all tests thus far only found ICP and Cylinder rotation)

Don't know if this helps

Early 99' stamp date 2/98 F350 Reg. cab LB SW Auto 4" lift 35"s 4" Turbo back straight pipe, Banks Cold air, Stage 1 Injectors, Modded 17, TS Beans Tunes, Turbo Master Wastegate, Riffraff FPx, KCM HPX line, GloShift Triple A Pillar gauges Hutch and Harpoon Mod. Black CPS, AE, 211,000 miles and climbing

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post #7 of 18 Old 01-28-2011, 05:11 PM Thread Starter
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Originally Posted by lang View Post
I posted about a week ago on some AE readings with no replies. My E99 ICP readings seem to be all over the place at idle it fluctuates from 461-502 and WOT i have hit high 2800's but usually between high 2400'S to high 2600's

ICP Duty cycle at idle 8.98 jumps to 9.37 with nothing in between.

I've been searching for acceptable AE Perdel readings(for all tests thus far only found ICP and Cylinder rotation)

Don't know if this helps

Thanksfrom what I have been reading your pressure is dead on!

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post #8 of 18 Old 01-29-2011, 07:11 AM
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Correct,

Basically at idle youll see around 500psi at idle.. and up to 4000psi at WOT

anything over 4000psi will pop the Valve for over pressure..

if it fails it will default to 4100 etc to allow the truck to still run..

Now the reason you see it spike is the ICP is the desired and the IPR is the regulated reading in the head..those 2 numbers have to be within so much of eachother.. at WOT 3000psi is still good numbers..thats 21 000psi fuel pressure in the cylinder lol its working great!

http://www.fordtechservice.dealercon...iagnostics.pdf

have a read too..helps for diag!

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post #9 of 18 Old 01-29-2011, 05:53 PM Thread Starter
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Quote:
Originally Posted by 03_Turbo7.3 View Post
Correct,

Basically at idle youll see around 500psi at idle.. and up to 4000psi at WOT

anything over 4000psi will pop the Valve for over pressure..

if it fails it will default to 4100 etc to allow the truck to still run..

Now the reason you see it spike is the ICP is the desired and the IPR is the regulated reading in the head..those 2 numbers have to be within so much of eachother.. at WOT 3000psi is still good numbers..thats 21 000psi fuel pressure in the cylinder lol its working great!

http://www.fordtechservice.dealercon...iagnostics.pdf

have a read too..helps for diag!
Thanks! I will do some reading on this and get back to you. I think I understand now that the IPR helps build the pressure, kind of like a fuel preaaure regulator but got to figure out how to test it now.Thats still foggy to me.

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post #10 of 18 Old 01-29-2011, 06:49 PM
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Quote:
Originally Posted by 03_Turbo7.3 View Post
Correct,

Basically at idle youll see around 500psi at idle.. and up to 4000psi at WOT

anything over 4000psi will pop the Valve for over pressure..

if it fails it will default to 4100 etc to allow the truck to still run..

Now the reason you see it spike is the ICP is the desired and the IPR is the regulated reading in the head..those 2 numbers have to be within so much of eachother.. at WOT 3000psi is still good numbers..thats 21 000psi fuel pressure in the cylinder lol its working great!

http://www.fordtechservice.dealercon...iagnostics.pdf

have a read too..helps for diag!
Anything above 2600psi is fine at WOT... You will find VERY few trucks that will hit 3000psi at WOT.

Duty cycle is a mesurment of how hard your pump is working... 6% is not very hard, 50% is working hard... Anything over 60% or so is all the pump will do.

01 F-250 SC PSD,320k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, 230/100 from P.I.S, Studs, 910 springs, Forged rods, Water injection,Hydra chip-No Limit/Gearhead tuning, Swamps HVHF IDM, MBRP 4" dual's, Aero, 6" tip's, 4" Revtek lift, 37/12.5/16.5 MT's
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