IPR ICP
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Joined: Jan 2014
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IPR ICP
I changed my IPR valve in my 2000 7.3 but sometimes at stop signs or stop lights the truck will die it will not start but if I open hood and disconnect the wire from IPR and reconnect it the truck will start right up. Is this a bad ICP?
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Almost sounds like wire chafing. Have you inspected the plug and wires going back
into the harness for any damage or oil?
The reason I say try this is the cost is not that high vs a new IPR.
Sean
into the harness for any damage or oil?
The reason I say try this is the cost is not that high vs a new IPR.
Sean
Hotshot
Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
Not to pick nits... but you are disconnecting the ICP to get the truck running. I mention that for the readers, not to pick on you. You did good by way of troubleshooting, this sounds like a bad ICP... a lot of them are failing right about now.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 27
From: Mesa AZ
The OP said he replaced the IPR and then when the truck dies he removes and then replaces the plug and then the truck starts. To me this sounds like a possible wire harness problem with the IPR wiring like Yahiko is suggesting.
Senior User
Joined: Sep 2013
Posts: 498
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From: Hagerstown, MD
OP-
You should take a good look at the harness itself as mentioned above. Recently I was having a wondering idle, and low ICP at times... Intermittent I would say. I also had an instance where the truck died as I was zip tying some wires around the fuel bowl. I was led to replace the IPR, which I did. While I was changing it I noticed the harness was in rough shape... The wires were loose and the harness was brittle and old. I plugged it back in and ordered a new harness from DieselORings.
When the new harness came in I went to change it out and took a real good look. I noticed the wires had been contacting each other and it appears that it melted all the plastic around where they go into the plug. I spliced a new harness in and problem solved.
You should take a good look at the harness itself as mentioned above. Recently I was having a wondering idle, and low ICP at times... Intermittent I would say. I also had an instance where the truck died as I was zip tying some wires around the fuel bowl. I was led to replace the IPR, which I did. While I was changing it I noticed the harness was in rough shape... The wires were loose and the harness was brittle and old. I plugged it back in and ordered a new harness from DieselORings.
When the new harness came in I went to change it out and took a real good look. I noticed the wires had been contacting each other and it appears that it melted all the plastic around where they go into the plug. I spliced a new harness in and problem solved.
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Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I am very confused how you determined this ^^....
The OP said he replaced the IPR and then when the truck dies he removes and then replaces the plug and then the truck starts. To me this sounds like a possible wire harness problem with the IPR wiring like Yahiko is suggesting.
The OP said he replaced the IPR and then when the truck dies he removes and then replaces the plug and then the truck starts. To me this sounds like a possible wire harness problem with the IPR wiring like Yahiko is suggesting.
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Senior User
Joined: Sep 2013
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From: Hagerstown, MD
As did I. Or I would've replied with my story the first time I read the thread. Seemed like you had a pretty good handle on it... 
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