No start -- low ICP
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Laughing Gas
Joined: Apr 2007
Posts: 779
Likes: 0
From: Burton, Texas
No start -- low ICP
I've been having a no start problem and I had codes for the EGR valve. (P0403, P0404, P0405.) I ordered a new EGR valve and installed it, but still no start. I had it towed to the dealer and they said the ICP pressure was 250 and that it should be about 500. Right now I owe them $135. They said to take off the valve covers and do an "air test" it would be $608 for labor. I told them to let me have the truck back. They somehow got it started to drive it into the shop, but I don't see how. I'd like to know that trick. So what should I do next?
Last edited by Norton72; Sep 11, 2018 at 05:15 PM. Reason: Change title
Postmaster
Joined: Aug 2015
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Likes: 18
From: NW IA
Is it possible you have a bad ICP and they simply unplugged it to get it running?
And FYI........you don't have to take the valve covers off just to air test, they should know that much, which tells me perhaps they don't know that much.
And FYI........you don't have to take the valve covers off just to air test, they should know that much, which tells me perhaps they don't know that much.
FTE Legend
Joined: Jan 2009
Posts: 80,535
Likes: 97
From: Norlina NC
are you sure they started it to get it into the shop?? the dealers here either hand push or use forklift to push from behind.. they broke the spare tire carrier on my truck using the forklift to push it around.. still annoyed they broke it but glad they confessed to it and fixed it @ no charge before i showed up.
it is true you need a minimum of 500 psi to fire the injectors before it will start... but if the icp sensor is bad you can unplug the sensor to force the computer to run off the default ICP values comparative to what it reads off the IPR value as a backup.
it is true you need a minimum of 500 psi to fire the injectors before it will start... but if the icp sensor is bad you can unplug the sensor to force the computer to run off the default ICP values comparative to what it reads off the IPR value as a backup.
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Laughing Gas
Joined: Apr 2007
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From: Burton, Texas
Ok, thanks. Yes, I'm positive that they drove it into the shop. I was reading through some threads and remember seeing that if the ICP leaks that it will leak oil on the back of the motor. That reminded me that I had been smelling burnt oil faintly for the last couple of weeks or so. I hate just throwing parts at problems, but if they did disconnect the sensor to start the truck, then to me it sounds like I need a new one. I'm putting this part number here so I can refer to it later, and hopefully for someone to verify it is the correct one.
4C3Z-9F838-A
4C3Z-9F838-A
FTE Legend
Joined: Jan 2009
Posts: 80,535
Likes: 97
From: Norlina NC
it depends on the location of the ICP where itll leak at.. since yours is an 05 you will be lucky as itll be on the passenger side valve cover in the open (grumbles about that).. when those leak itll make a mess on that side of the engine.. which its really rare for that particular one to leak.. it was more the late 03/early04's that were prone to leaking.. and when they did they make a mess everywhere across the back.. the late 03/early 04's sat underneath the turbo and got cooked by the exhaust up-pipes.. because of where they sat meant they were a pita to get to also..
Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
Ok, thanks. Yes, I'm positive that they drove it into the shop. I was reading through some threads and remember seeing that if the ICP leaks that it will leak oil on the back of the motor. That reminded me that I had been smelling burnt oil faintly for the last couple of weeks or so. I hate just throwing parts at problems, but if they did disconnect the sensor to start the truck, then to me it sounds like I need a new one. I'm putting this part number here so I can refer to it later, and hopefully for someone to verify it is the correct one.
4C3Z-9F838-A
4C3Z-9F838-A
I would also double check the pigtail, be sure it's not looking chaffed or has any loose pins, if the switch is oily then replace the pigtail as well.......at the least clean it up good with some electrical contact cleaner
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Laughing Gas
Joined: Apr 2007
Posts: 779
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From: Burton, Texas
Well I'm up here at the dealership to pick up my truck. Had to go out of town this week. I unplugged the ICP but I still can't get it to start. ICP pressure with sensor unplugged says about 1150 psi. Shouldn't it be zero?
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Fleet Owner
Joined: Nov 2003
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That is the default number you get with a later model year truck with the ICP unplugged. Should not be zero.
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Fleet Owner
Joined: Nov 2003
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The HPOP leaks are internal, they drain back to the crankcase.
Not sure what they might have done to get it started. I don't think the ICP sensor is your problem. Since your ICP is on the passenger side valve cover, you should be able to see any leakage from it or the connector. The ICP leakage at the back of the motor is on the 03's and early 04's.
If they saw low ICP pressure (below 500 psi) when cranking, and you have shown that the ICP sensor isn't the thing keeping it from starting, then I am not sure how to get it started.
Make sure you are cranking at 150 rpm or better. That doesn't sound like your current issue, but it might help if you are right on the edge of 500 psi to start.
Not sure what they might have done to get it started. I don't think the ICP sensor is your problem. Since your ICP is on the passenger side valve cover, you should be able to see any leakage from it or the connector. The ICP leakage at the back of the motor is on the 03's and early 04's.
If they saw low ICP pressure (below 500 psi) when cranking, and you have shown that the ICP sensor isn't the thing keeping it from starting, then I am not sure how to get it started.
Make sure you are cranking at 150 rpm or better. That doesn't sound like your current issue, but it might help if you are right on the edge of 500 psi to start.
Thread Starter
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Laughing Gas
Joined: Apr 2007
Posts: 779
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From: Burton, Texas
Yes, I'm getting sync, and I'm cranking 150 RPM. I just put two new Odyssey Extreme batteries and a new 140A alternator in when I got the FICM repaired. Maybe I should have had it towed to another shop instead of my house.
Fleet Mechanic
Joined: Nov 2008
Posts: 1,443
Likes: 9
From: South Alabama
What is ICP psi with it plugged in? Starting to sound like a leak. Dummy’s or standpipes or injector top seals.
went back up and read and saw pressure at 250.
They probably got it started with starting fluid WHICH IS NOT RECCOMENDED!!!!
went back up and read and saw pressure at 250.
They probably got it started with starting fluid WHICH IS NOT RECCOMENDED!!!!
Thread Starter
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Laughing Gas
Joined: Apr 2007
Posts: 779
Likes: 0
From: Burton, Texas
Standpipes and dummy plugs have not been done on this truck. I spent a ton of money getting it done on my other truck before it was stolen. If I have to do it a again I'll have to do it myself.