Help me solve this
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Junior User
Joined: Nov 2010
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Ok put a voltmeter on the icp and at idle it read .76-.79
At 2000 rpm reads .9
Now I read somewhere that it needs minimum of .85 now is that at idle or at a certain rpm?
Kinda could make sense since most of my probs are at idle. Does anyone think that my icp is faulty?
Also I know where the hpop is and ipr now.
Is there anything I should keep in mind as far as do's and dont's when replacing the orings? I got the kit from ford came with a wierd nut, bushing, and three o rings.
At 2000 rpm reads .9
Now I read somewhere that it needs minimum of .85 now is that at idle or at a certain rpm?
Kinda could make sense since most of my probs are at idle. Does anyone think that my icp is faulty?
Also I know where the hpop is and ipr now.
Is there anything I should keep in mind as far as do's and dont's when replacing the orings? I got the kit from ford came with a wierd nut, bushing, and three o rings.
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
IPR is located on the lower right rear of the HPOP. You will need to pull the fuel filter/water separator to access it. First check the ICP on the left side oil rail towards the front of the engine. It has a wiring harness with 3 wires connected to it. Pull it and see if there is any oil residue where the wiring harness plugs in. If so it is going bad. Even if there is no oil present the ICP sensor seems to typically have a lifespan of around 200,000 to 240,000 before they need replacing.
If it doesn't seem like it is an ICP sensor I would have a set of IPR o-ring on hand before pulling it. Once you go to that effort you might as well just replace the o-rings anyway.
Another problem area producing poor performance could be sludge build up in the HPOP. If the oil hasn't been changed regularly (3000 miles or so) for the life of the truck the HPOP tends to get gunked up. No one changes that oil and it seems to cycle back to the lower oil pan slowly. The injectors like clean oil that flows well to work properly. There is a plug on the left side top of the HPOP that you can remove and stick a tube down to the bottom of the HPOP and pump out about a quart of oil and replace it with new clean oil thru the same hole you pumped it out of. A vacuum pump or oil transfer hand pump will work. Run the truck for about 10 minutes at idle and then remove another quart and replace it. This will help clean out any sludge and keep clean oil firing the injectors. Remember to put the plug back in the hole before starting the truck as the HPOP can produce a lot of psi and with out the plug in you will have one heck of a mess.
If it doesn't seem like it is an ICP sensor I would have a set of IPR o-ring on hand before pulling it. Once you go to that effort you might as well just replace the o-rings anyway.
Another problem area producing poor performance could be sludge build up in the HPOP. If the oil hasn't been changed regularly (3000 miles or so) for the life of the truck the HPOP tends to get gunked up. No one changes that oil and it seems to cycle back to the lower oil pan slowly. The injectors like clean oil that flows well to work properly. There is a plug on the left side top of the HPOP that you can remove and stick a tube down to the bottom of the HPOP and pump out about a quart of oil and replace it with new clean oil thru the same hole you pumped it out of. A vacuum pump or oil transfer hand pump will work. Run the truck for about 10 minutes at idle and then remove another quart and replace it. This will help clean out any sludge and keep clean oil firing the injectors. Remember to put the plug back in the hole before starting the truck as the HPOP can produce a lot of psi and with out the plug in you will have one heck of a mess.
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Postmaster
Joined: Sep 2007
Posts: 4,195
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From: Medford Oregon
From here ... 97-15A 7.3L DI Turbo Workshop Manual
Voltage PSI 1.0 v Minimum required at engine cranking speed 100 RPM
.88 - 1.19 Volt (540-790 RPM) Normal warm idle voltage signal
1.38 - 1.53 Volt (960-1088 RPM) Normal high idle voltage signal
3.22 Volt Snap accel or full load pressure signal
Voltage PSI 1.0 v Minimum required at engine cranking speed 100 RPM
.88 - 1.19 Volt (540-790 RPM) Normal warm idle voltage signal
1.38 - 1.53 Volt (960-1088 RPM) Normal high idle voltage signal
3.22 Volt Snap accel or full load pressure signal
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Junior User
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From here ... 97-15A 7.3L DI Turbo Workshop Manual
Voltage PSI 1.0 v Minimum required at engine cranking speed 100 RPM
.88 - 1.19 Volt (540-790 RPM) Normal warm idle voltage signal
1.38 - 1.53 Volt (960-1088 RPM) Normal high idle voltage signal
3.22 Volt Snap accel or full load pressure signal
Voltage PSI 1.0 v Minimum required at engine cranking speed 100 RPM
.88 - 1.19 Volt (540-790 RPM) Normal warm idle voltage signal
1.38 - 1.53 Volt (960-1088 RPM) Normal high idle voltage signal
3.22 Volt Snap accel or full load pressure signal
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
From here ... Diesel Diagnostic information for Powerstroke 6.0, 7.3, IDI 7.3 and 6.9 L, by Oregon Fuel Injection
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Update
So I replaced the ipr orings now the truck runs terrible. I did not fill the hpop back up with oil and haven't run it for that long maybe 3 min total. With all the oil that came out of the hpop is it possible there is air in the lines? Some please give me some insight trying to get this thing going.
I also inspected the ipr valve and piston. Put a small punch in the valve it have about an 1/8" of play and no hesitation to spring back. Seems like everything is functioning. The orings were in a kit from ford and yes the ipr is tight on the hpop
I also inspected the ipr valve and piston. Put a small punch in the valve it have about an 1/8" of play and no hesitation to spring back. Seems like everything is functioning. The orings were in a kit from ford and yes the ipr is tight on the hpop
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
So I replaced the ipr orings now the truck runs terrible. I did not fill the hpop back up with oil and haven't run it for that long maybe 3 min total. With all the oil that came out of the hpop is it possible there is air in the lines? Some please give me some insight trying to get this thing going.
I also inspected the ipr valve and piston. Put a small punch in the valve it have about an 1/8" of play and no hesitation to spring back. Seems like everything is functioning. The orings were in a kit from ford and yes the ipr is tight on the hpop
I also inspected the ipr valve and piston. Put a small punch in the valve it have about an 1/8" of play and no hesitation to spring back. Seems like everything is functioning. The orings were in a kit from ford and yes the ipr is tight on the hpop
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The other thing I noticed was on the icp solonoid connector. The orange boot with damaged/worn out pretty bad.
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
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From: Celaya, Gto. MX
I missread your post. sorry
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
Ok, I dont think that you can get only the solenoid, but I could be wrong. IDK. But you can get the o-rings and the rubber boot alone.
Good luck.
Good luck.
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Ok update.
Tested hpop at the ports on cylinder heads. I got 500 at idle
And around 3000 Rpm which is the highest psi it read was 1450 or so I can't remember exactly. Not higher than 1600
Doesn't that seem low?
Also when to get he truck scanned again. Came up with low air circuit boost something like that
And can position sensor. Went to the ford dealer got the dark blue sensor. They didn't have the black. Out it in still stumble at idle. I notice it does it at operating temp not when cold.
I just have the down pipe on the truck and it does sound like I have an exhaust leak. Can that be the culprit?
Tested hpop at the ports on cylinder heads. I got 500 at idle
And around 3000 Rpm which is the highest psi it read was 1450 or so I can't remember exactly. Not higher than 1600
Doesn't that seem low?
Also when to get he truck scanned again. Came up with low air circuit boost something like that
And can position sensor. Went to the ford dealer got the dark blue sensor. They didn't have the black. Out it in still stumble at idle. I notice it does it at operating temp not when cold.
I just have the down pipe on the truck and it does sound like I have an exhaust leak. Can that be the culprit?