Sensor Questions
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Elder User
Joined: Jan 2003
Posts: 898
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Sensor Questions
97 F250HD 7.3 395+k miles.
Retired work truck been used here on the property last few years.
Hard starting, will run fine then...just shuts off.
No cough no stutter no nothing.
Will not restart.
Let it set a few hours and it starts again.
When CPS is bad, does it still work "sometimes"?
How about the other sensors commonly associated with non start conditions?
In the past, I have been taught electronics are either good or bad, no in between.
Don't see any leaks around HPOP.
Really want to get this truck back in service for snow removal this season.
Retired work truck been used here on the property last few years.
Hard starting, will run fine then...just shuts off.
No cough no stutter no nothing.
Will not restart.
Let it set a few hours and it starts again.
When CPS is bad, does it still work "sometimes"?
How about the other sensors commonly associated with non start conditions?
In the past, I have been taught electronics are either good or bad, no in between.
Don't see any leaks around HPOP.
Really want to get this truck back in service for snow removal this season.
Cargo Master
Joined: Mar 2019
Posts: 2,907
Likes: 788
From: Kinnula,Finland
Possible IPR valve acting up when warms up.
Then works after cooldown.
Yes,most common thing with CPS is that it will start right up again.But good to have a new Motorcraft CPS nearby.
Also if you have to swap IPR,OEM is the way to go.
Then works after cooldown.
Yes,most common thing with CPS is that it will start right up again.But good to have a new Motorcraft CPS nearby.
Also if you have to swap IPR,OEM is the way to go.
Laughing Gas
Joined: Oct 2019
Posts: 949
Likes: 109
From: Fowler Colorado
X2 on the ipr. Had that problem leave me on the highway a couple times. Make sure the nut on the back of it is tight. It would be good to rule out the cps as well. Pretty common thing like FinnishStroker stated
Laughing Gas
Joined: Apr 2020
Posts: 1,232
Likes: 284
From: NT, See you in the
IPR reseal is under 14 dollars from Riff Raff. Would be worth pulling and resealing before dropping 180 bucks on a brand new IPR. I pulled mine for rebuild and I was surprised it even ran. My O rings were very close to going bad.
https://www.riffraffdiesel.com/ipr-c...e-re-seal-kit/
https://www.riffraffdiesel.com/ipr-c...e-re-seal-kit/
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Elder User
Joined: Jan 2003
Posts: 898
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IPR reseal is under 14 dollars from Riff Raff. Would be worth pulling and resealing before dropping 180 bucks on a brand new IPR. I pulled mine for rebuild and I was surprised it even ran. My O rings were very close to going bad.
https://www.riffraffdiesel.com/ipr-c...e-re-seal-kit/
https://www.riffraffdiesel.com/ipr-c...e-re-seal-kit/
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Fleet Owner
Joined: Aug 2004
Posts: 20,419
Likes: 197
From: AZ
A shut off is caused by the IPR sticking closed stopping oil flow. This is usually caused by the IPR being wore out and/or dirty.
Mine shut off once on a bridge and I was extremely lucky to have enough momentum to roll off the bridge to clear traffic. To get going again the IPR was the last thing I replaced of course, just didn't want the oil mess. I didn't have my mity vac with me.
Mine shut off once on a bridge and I was extremely lucky to have enough momentum to roll off the bridge to clear traffic. To get going again the IPR was the last thing I replaced of course, just didn't want the oil mess. I didn't have my mity vac with me.
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