Hpop testing help
#1
06-10-2014, 10:22 PM
Join Date: Nov 2009
Location: Crapy southern New Jersey
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Hpop testing help
Hello guys,
I'm having problems with one of my truck not restarting hot. I've haven't seem to get a whole lot of help on this subject around here. It hard for me to get answers quick as I'm keeping it 2 hours away at my fathers place.
Truck is a 97 F-super duty, 7.3, 5 speed, 162,000. The P/o had the same problem and sold it to me cheap. I thought it was an injector o ring failure. I was sadly wrong. So, he put a new bosh fuel pump on it, icp, irp, uvch's, rebuilt fuel bowl, new injector O rings.
When I got it home it was hard to start cold and no restart hot. I have since then, put new injector o rings in. I found 2 that didn't seat all the way. Fix that problem and it starts cold good now. I'm not sure about ice cold starts under freezing. I had high hopes that was my problem. Nope. So it leaves me here. Truck will not restart above about 120*'s. With that, while cranking my hpop only making 200-300psi hot. Then will spike too 2000psi. That is shown off ae program. I asked about this and didn't get far. So I went out and bought a 100-3,000 psi oil gauge to put into the head. My only problem was I need an adapter made this week. Gonna try to get back there Saturday or Sunday. I just don't have the cash flow to throw parts at it right now.
What should my hpop oil psi be hot and cold?
I've heard of using a porta power to check the heads. Anyone got more info on this?
Anything else I should know or look for please tell. I could really use my dump truck again.
Thanks Doug!!!
I'm having problems with one of my truck not restarting hot. I've haven't seem to get a whole lot of help on this subject around here. It hard for me to get answers quick as I'm keeping it 2 hours away at my fathers place.
Truck is a 97 F-super duty, 7.3, 5 speed, 162,000. The P/o had the same problem and sold it to me cheap. I thought it was an injector o ring failure. I was sadly wrong. So, he put a new bosh fuel pump on it, icp, irp, uvch's, rebuilt fuel bowl, new injector O rings.
When I got it home it was hard to start cold and no restart hot. I have since then, put new injector o rings in. I found 2 that didn't seat all the way. Fix that problem and it starts cold good now. I'm not sure about ice cold starts under freezing. I had high hopes that was my problem. Nope. So it leaves me here. Truck will not restart above about 120*'s. With that, while cranking my hpop only making 200-300psi hot. Then will spike too 2000psi. That is shown off ae program. I asked about this and didn't get far. So I went out and bought a 100-3,000 psi oil gauge to put into the head. My only problem was I need an adapter made this week. Gonna try to get back there Saturday or Sunday. I just don't have the cash flow to throw parts at it right now.
What should my hpop oil psi be hot and cold?
I've heard of using a porta power to check the heads. Anyone got more info on this?
Anything else I should know or look for please tell. I could really use my dump truck again.
Thanks Doug!!!
#2
06-10-2014, 11:31 PM
Join Date: Apr 2003
Location: Worland, WY
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Hey Doug, I know you said the IPR and ICP were replaced already but they could still be bad. Have you tried starting it with the ICP unplugged when its hot? Also you could have bad IPR o-rings as well, the thinner oil when hot can leak by.
ICP at idle should be about 475psi. IPR duty cycle at idle should be 9-12%. What are your ICP and IPR numbers when cold and hot? With the ICP unplugged and at idle you should see 700psi.
There needs to be at least 500psi ICP while cranking to start the truck. With the ICP unplugged while cranking you should see about 2200psi.
Let us know, hope that helps.
ICP at idle should be about 475psi. IPR duty cycle at idle should be 9-12%. What are your ICP and IPR numbers when cold and hot? With the ICP unplugged and at idle you should see 700psi.
There needs to be at least 500psi ICP while cranking to start the truck. With the ICP unplugged while cranking you should see about 2200psi.
Let us know, hope that helps.
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