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Lpop is fine by looking at video he posted other day. My money is on ipr valve or corresponding wiring for it. Which is what I've been preaching since the beginning lol
Yes you have. And at this point I agree. Seems like the HPOP failures we’ve seen on the forum has tons of brass particles inside the IPR.
Yes you have. And at this point I agree. Seems like the HPOP failures we’ve seen on the forum has tons of brass particles inside the IPR.
I had the coil part go bad on one of my ipr one time. Pulling camper down the interstate. Random just dies like you turned the key off. Spun over like crazy and no icp and no start at all. Let it cool off for a hour fires right back up and will run until it got hot again then same thing. So a bad coil or wiring issue on the ipr could definitely be causing his symptoms.
I had the coil part go bad on one of my ipr one time. Pulling camper down the interstate. Random just dies like you turned the key off. Spun over like crazy and no icp and no start at all. Let it cool off for a hour fires right back up and will run until it got hot again then same thing. So a bad coil or wiring issue on the ipr could definitely be causing his symptoms.
I had a similar experience with an IPR coil. My truck would surge/ stutter at certain loading. After many hours of logging and eventually just going column by column in excel to find any discrepancy.
I took apart the IPR cleaned and re-sealed. Tested coil and it was out of spec but IIRC it was only .6 ohm +/-
purchased new IPR but only swapped the coil and it no longer surged.
I’ve also seen a new terminator pump eat itself with only a few thousand miles on it. Found aluminum and peices of a spring.
Broke down ipr, cleaned and assembled found nothing but oil. Ordered a bunch of parts to perform dead head test but finding a stc quick connect male cap to block off one of the hpop lines is difficult. Will install ipr and fill reservoir with oil as well as drivers oil rail and turn over motor. Been super busy working trying to stay ahead in the crazy world but I appreciate all the help from you guys in the fte forum, truly appreciate help and insight. Learning as I go.
Thanks
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Saw the video. Oil does flow from the LPOP so it appears to be HPOP and beyond that has the issue.
Test the IPR coil resistance first. Easy and free.
While the IPR is out, I assume you can also apply voltage across the IPR pins and see some type of movement of the spool valve. If not the spool itself, the oil in the holes should move a bit. Someone else will need to confirm this though because I’ve never tried it.
After looking at the IPR, I would buy an IPR block off tool and go from there. Simple ands gets straight to the point.
Install the tool and crank with ICP out. If oil doesn’t shoot out of the hole then the HPOP is bad. If oil does shoot out the hole then either the IPR or associated wiring is bad.
I think this “air tester” would work if you put a pipe plug in the external hole of the tool. Otherwise you can buy one from Riffrafff for like $40.
Udsuth’s 12v method may work for a similar test, but if the IPR is completely shot then it won’t work for the test. I think the results would still be questionable which is why I recommend blocking it off instead.
You might check with CNC Fab or dieselorings .com.
But in my opinion I don’t see a reason to deadhead the pump (not yet at least). You have zero flow from the HPOP. So as it sits your deadhead test is going to fail. Find the reason for no flow and you should be able to fix the problem.
Here is actual data from my truck with the IPR solenoid disconnected then connected. I've never seen a bad IPR cause NO rise in ICP. Pressure is resistance to flow, and the IPR has a very small orifice and creates resistance whether the valve is functioning or not.
Here is actual data from my truck with the IPR solenoid disconnected then connected. I've never seen a bad IPR cause NO rise in ICP. Pressure is resistance to flow, and the IPR has a very small orifice and creates resistance whether the valve is functioning or not.
If oil rails are empty which I sure they are from reservoir draining numerous times and from pulling icp sensor and no oil in the rails. It can take minutes of cranking to fill them even with a 100% functioning ipr valve. As I'm sure your aware of. Now imagine trying to fill them just off the very small orifice of a non functioning ipr and how long it could take before you got any pressure to build at all.
If oil rails are empty which I sure they are from reservoir draining numerous times and from pulling icp sensor and no oil in the rails. It can take minutes of cranking to fill them even with a 100% functioning ipr valve. As I'm sure your aware of. Now imagine trying to fill them just off the very small orifice of a non functioning ipr and how long it could take before you got any pressure to build at all.
This truck has been cranked and cranked and cranked. There is something else going on. Even if the oil rails were completely empty, the pressure should start to ramp up within a fairly short time.
This truck has been cranked and cranked and cranked. There is something else going on. Even if the oil rails were completely empty, the pressure should start to ramp up within a fairly short time.
And each time more air introduced into the system as he takes something else apart.
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