No. ICP is the sensor that controls the IPR.

 

No. One is a regulator and the other is a sensor. In other words....one does work and the other measures it.

Here is a good write up that explains how the oil system works.

 

Effectively this is correct. However, technically speaking the ICP sensor measures the high pressure oil and reports that info to the PCM. The PCM controls the IPR via duty cycle voltage. If the ICP sensor fails, the PCM can still adjust the IPR to keep the engine running as long as other systems are functioning properly. It uses inferred values for ICP based off a preloaded table.

 

Evidently, when Benjamin ran his oil too low, which was coincidental with his ICP failing, he must have ingested some air into the system due to low oil flow from the low pressure oil pump. He has run the truck a bit, and everything is now running smoothly.

 

No. ICP is the sensor that controls the IPR.

 

Sorry for the double post.

While on the subject of ipr.....how common does it get stuck open? I just changed injectors and am thinking my IPR might have gotten stuck open due to it being drained of oil

 

You can get a little air in there when changing it, I lost a little bit when I changed mine. It all depends on how fast you are at changing it.

Edit:
I changed mine around 170K miles. I was getting a 1280 code, I had no oil in the connector, I replaced it, It seemed to work fine for a month or so, then the 1280 code came back. I replaced the IPR, I still get the 1280 code, I now have spares.... I have replaced the pigtail on the ICP wiring too. I still get a SES light and a 1280 code some times... Now I just ignore it and drive the truck. If she fires and moves under her own power, off to work I go.

 

PCM - IPR - ICP interaction:



ICP pic is of the older style with 5/8" hex. Newer style has a 1 1/8" hex.

 

My sensor never failed I just noticed oil in the plug & replaced it at about 185k miles. Stock HPOP

Kept the old for an emergency

 

I probably voted wrong. I changed mine around 330k because it had a little oil in the connector. The new one didn't make it run any better and soon got the same small amount of oil. I loaned my old one to a local guy who had ICP issues, and last I heard he's still running it. So technically I guess it's never failed, but I have no idea the current mileage on it. Should be less than 400k though.

 

had a new replacement ford icp die also never worked for 1 min

 

Replaced mine at ~140k miles because of oil in the plug. No running issues, however.

 

Perhaps the sensor failure is a function of how much oil flow there is through the seals in the sensor?

Benjamin's oil leak had just gotten really bad, and we're still not yet sure if it was simply the ICP or if he has other leaks elsewhere. He'll be washing the engine bay tonight and letting it sit until we can dig in and proactively (or necessarily) replace all the HPOP o-rings and non-serviceable plug on Saturday.

 

Bump... for those who may not have yet seen this poll.

 

No failure 281.000 miles.