Need some ICP/HPOP advice. - Ford Powerstroke Diesel Forum
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Old 06-28-2014, 10:51 AM
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Need some ICP/HPOP advice.

So my truck died on the way home a few days ago. Lost power just puttering down a country road. Had to walk home with my 2 year old son.

The truck is a basically stock '04 6.0. It has a river city egr cooler bypass and the sct mild [mileage] tune. The stock head gaskets are still holding at 220k.

Codes are P0676, P2285, P2290, and P2291. Had to borrow a snap-on scanner from a friend of a friend because the Autozone scanner wouldn't read anything.

So anyway, based on googling those codes, I replaced the ICP sensor and the glow plug module. Still nothing. The truck will not start with the sensor unplugged either.

What's next? HPOP? Any wise counsel is appreciated..

Thanks, RTP
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Old 06-28-2014, 11:57 AM
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If it's not starting at all I would say HPOP however if it it running but like crap almost like it's missing and it could be a bad IPR valve. Had mine do that.
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Old 06-28-2014, 12:17 PM
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Not to thread jack here.
But are you saying if one were to have a bad ICP, unplugging it and starting the truck should tell you?

I'm having an issue with a truck I have, 06, that starts perfectly fine when cold. But once up to temp will not start if you shut it down.
So in theory, I could find out if it is an Icp problem, if after unplugging the Icp the truck starts fine?


My neighbor drives a Prius.
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Old 06-28-2014, 12:32 PM
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Do you still have the stock STC fitting?
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Old 06-28-2014, 12:58 PM
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Quote:
Originally Posted by Seattle60 View Post
Do you still have the stock STC fitting?
I thought those were only on the '05 and up?

Build date inside the door is 01/04. It says "2004" right on the valve cover. I didn't think I had an STC fitting?

However, my ICP sensor is on the valve cover, which I've been told that they didn't start doing until around 06/04, so who knows? I was pretty happy that it wasn't behind the turbo where it was allegedly supposed to be.
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Old 06-28-2014, 03:19 PM
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My apologies, you are correct. Your pump probably looks like this: See page 41, http://www.powerstrokediesel.com/docs/EF_456.pdf which is for the 2003.25
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Old 06-30-2014, 06:56 PM
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Quote:
Originally Posted by j.mo View Post
So in theory, I could find out if it is an Icp problem, if after unplugging the Icp the truck starts fine?
Yes. Also, it's a really easy thing to check. It takes 10 seconds to pop the hood and unplug the sensor.
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Old 06-30-2014, 08:09 PM
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Quote:
Originally Posted by ralphtheplumber View Post
So my truck died on the way home a few days ago. Lost power just puttering down a country road. Had to walk home with my 2 year old son.

The truck is a basically stock '04 6.0. It has a river city egr cooler bypass and the sct mild [mileage] tune. The stock head gaskets are still holding at 220k.

Codes are P0676, P2285, P2290, and P2291. Had to borrow a snap-on scanner from a friend of a friend because the Autozone scanner wouldn't read anything.

So anyway, based on googling those codes, I replaced the ICP sensor and the glow plug module. Still nothing. The truck will not start with the sensor unplugged either.

What's next? HPOP? Any wise counsel is appreciated..

Thanks, RTP
Do you have a monitor you can hook up to it to see ICP pressure and or voltage, IPR % and or voltage? FICM sync etc? This will give you a better indication of whats going on.
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Old 06-30-2014, 09:46 PM
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Quote:
Originally Posted by snowmakerdrew View Post
Do you have a monitor
I think that I can check some or all of those with my tuner. I had kinda forgotten that I had that. Probably didn't need to burn a favor borrowing the fancy scanner.

I'll plug it in hopefully tomorrow and report back. The truck is currently in my pole barn way in the backyard, and it's pouring rain right now. Also, it's after midnight.
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Old 07-06-2014, 01:55 PM
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ICP pressure = 615 psi, although it took ~10 seconds of cranking to get there.
IPR % = 85
FICM SYNC = Yes
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