ICP?

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Jul 2, 2025 | 09:58 PM

cbrown9064

Thread Starter

Fleet Mechanic

Joined: Feb 2007

Posts: 1,252

Likes: 113

From: Mandan, ND

ICP?

Last week had an ICP failure that killed truck cold on Interstate. Rural area. Unplugged ICP, truck fired right up. Got an ICP from only source that was available on small town, a NAPA branded ICP. Had to replace ICP at that point because it was leaking so bad.

Fast forward to this week. Get a check engine light on every start for about 45 seconds. It also idles a bit weird during this time. Then check engine goes out, idle returns to normal and runs great.

I scan for faults and none stored. I am thinking the off brand ICP is the issue? I also have EBPV delete pedestal and never bothered to put the jumper plug on the end of the EBPV connector. I have had the delete pedestal 2 years and this check engine just started last week after NAPA ICP.

Thoughts? I have a gauge on my Torque Pro to monitor pressures. What would I be looking for during this "check engine" time to see if it was ICP related? As in what psi values?

Besides this, truck has been running great.

Mods are Dieselsite Adrenaline, bellowed up pipes, KC stage 1, non-EBPV pedestal, hydra, aftermarket down pipe. Pretty stock unit.

Jul 3, 2025 | 07:48 AM

97-psd

Logistics Pro

Joined: Mar 2007

Posts: 4,585

Likes: 841

From: knoxville, tn

I would start with the ICP. Definitely need a motorcraft unit in there

Jul 3, 2025 | 08:42 AM

cbrown9064

Thread Starter

Fleet Mechanic

Joined: Feb 2007

Posts: 1,252

Likes: 113

From: Mandan, ND

Quote:

Originally Posted by 97-psd

I would start with the ICP. Definitely need a motorcraft unit in there

Awesome, thanks. Motorcraft or Navistar? Is there a difference between the two?

Jul 3, 2025 | 09:11 AM

97-psd

Logistics Pro

Joined: Mar 2007

Posts: 4,585

Likes: 841

From: knoxville, tn

Either should be fine. I would start with riffraff or dieselorings and go from there

Jul 3, 2025 | 12:43 PM

cbrown9064

Thread Starter

Fleet Mechanic

Joined: Feb 2007

Posts: 1,252

Likes: 113

From: Mandan, ND

My truck is a late (November) 97. Does anyone know what the difference is from a 94.5-96 and a 97-03 ICP sensor is? Two different part numbers…

Jul 3, 2025 | 05:25 PM

cbrown9064

Thread Starter

Fleet Mechanic

Joined: Feb 2007

Posts: 1,252

Likes: 113

From: Mandan, ND

I ordered a Navistar from Riff Raff. The local Ford stealer wanted $289!!! WTF...

Jul 3, 2025 | 11:41 PM

fordman67

Hotshot

Joined: Dec 2005

Posts: 14,377

Likes: 609

From: evansville in

Quote:

Originally Posted by cbrown9064

I ordered a Navistar from Riff Raff. The local Ford stealer wanted $289!!! WTF...

Good deal! Gotta love supporting Clay and family while also getting a reasonable price on things.

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Jul 21, 2025 | 12:11 PM

cbrown9064

Thread Starter

Fleet Mechanic

Joined: Feb 2007

Posts: 1,252

Likes: 113

From: Mandan, ND

Put the Motorcraft ICP in that I got from RiffRaff this AM. No check engine light. Truck starts faster and idles better. Drove 200 miles this AM on Interstate and "seemed" to get better mileage by fuel gauge position. There was a 6 kt tailwind for a bit of the trip, but mostly cross wind or no wind. Fuel Pressure stayed higher also. Will find out if that was really better mileage or not later today when I make the return trip.

Would a faulty ICP sensor (like the NAPA one) cause the truck to use more fuel? Just cannot remember all the fueling logic at the moment.

Anyway, NAPA sensor was giving check engine light. All it really did was to serve as an expensive ORB plug...