lpop on the way out???
#1
05-24-2016, 11:30 AM
lpop on the way out???
hi all
searched for similar issues have found none.
late 04 auto. HPOP 4 years ago
lately after a 5 minutes at a steady speed that has the motor at 1500 rpms or higher it will start cutting out. same way when an icp is going south. checked codes had one for icp out of range. got a new ford icp with no change.
put a gauge in the EOT port and zip tied to the windsheild wiper.
at cold start idle it would read 60-65
slowly decreased as the oil warmed but not steadily, kind of erracticlly.
once on the highway at a steady 70 mph 2000rpms its around 20 psi
after 5 minutes or so it starts cutting out still at 20 psi, icp drops to below 200, ipr is at 77. back out of the throttle slow down to 60 mph 1400 rpms everthing is fine except the guage is still at 20 psi jumping around +- 5psi.
hot idle is 10 psi
at lower speeds the gauge reads erraticlly from 20-35 psi
any ideas?
thanks in advance!
searched for similar issues have found none.
late 04 auto. HPOP 4 years ago
lately after a 5 minutes at a steady speed that has the motor at 1500 rpms or higher it will start cutting out. same way when an icp is going south. checked codes had one for icp out of range. got a new ford icp with no change.
put a gauge in the EOT port and zip tied to the windsheild wiper.
at cold start idle it would read 60-65
slowly decreased as the oil warmed but not steadily, kind of erracticlly.
once on the highway at a steady 70 mph 2000rpms its around 20 psi
after 5 minutes or so it starts cutting out still at 20 psi, icp drops to below 200, ipr is at 77. back out of the throttle slow down to 60 mph 1400 rpms everthing is fine except the guage is still at 20 psi jumping around +- 5psi.
hot idle is 10 psi
at lower speeds the gauge reads erraticlly from 20-35 psi
any ideas?
thanks in advance!
#3
05-24-2016, 09:56 PM
have you checked for any metal in the oil that's usually the cause of LPOP failure
Id check the LPO regulator is can stick and cause issue
and saw one once the anti drain back in the oil filter house was sticky causing a LPO Problem it was on FTE so maybe a search will yield something
and also keep in mind that a HPO Problem can and will look like a LPO Problemwith that said could be the IPR or HPOP
what HPOP did you replace with and how many miles on that HPOP
Id check the LPO regulator is can stick and cause issue
and saw one once the anti drain back in the oil filter house was sticky causing a LPO Problem it was on FTE so maybe a search will yield something
and also keep in mind that a HPO Problem can and will look like a LPO Problemwith that said could be the IPR or HPOP
what HPOP did you replace with and how many miles on that HPOP
#5
05-25-2016, 08:24 AM
replaced hpop at 203k, not sure of the brand local mechanic did it. 254k on it now.
I replaced the regulator right around the time the HPOP was done. I'll pull it and check.
there was , if I remember correctly, some very small aluminum flakes in the oil filter maybe 4 oil changes ago.
stupid scangage won't read pids right now. they're all blanks.
thanks
I replaced the regulator right around the time the HPOP was done. I'll pull it and check.
there was , if I remember correctly, some very small aluminum flakes in the oil filter maybe 4 oil changes ago.
stupid scangage won't read pids right now. they're all blanks.
thanks
#7
05-25-2016, 06:09 PM
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#8
05-26-2016, 11:50 AM
#9
05-26-2016, 01:58 PM
Fleet Mechanic
That seems pretty low, at least if it was a gas engine. DTRon had told me previously that 6.0's run pretty low base oil pressure due to the piston squirters so that might be fine. The factory dummy guage kicks in at 5psi so you are double that.
What is your ICP/IPR at hot idle? Typical should be ~550-600psig and 23-25% IPR
Are you able to load the motor beyond the points given?
Have you pulled and inspected the IPR valve?
Any thumping out the intake box that could indicate valve-train/lifter issues that would get metal down in the LPOP?
What is your ICP/IPR at hot idle? Typical should be ~550-600psig and 23-25% IPR
Are you able to load the motor beyond the points given?
Have you pulled and inspected the IPR valve?
Any thumping out the intake box that could indicate valve-train/lifter issues that would get metal down in the LPOP?
#10
05-26-2016, 04:42 PM
That seems pretty low, at least if it was a gas engine. DTRon had told me previously that 6.0's run pretty low base oil pressure due to the piston squirters so that might be fine. The factory dummy guage kicks in at 5psi so you are double that.
from what I read, LPOP is regulated to 70 psi
What is your ICP/IPR at hot idle? Typical should be ~550-600psig and 23-25% IPR
I don't remeber exact numbers but in that range
Are you able to load the motor beyond the points given?
If I drive 5 minutes close to 2000 rpms the icp drops below 200 and ipr is 77ish. the gauge I have rigged up is at 20 psi and the truck bucks , I beleive the LPOP is not keeping the resivoir filled
Have you pulled and inspected the IPR valve?
I havent pulled the ipr, although it's not too old got a screaming deal on craigslist.
Any thumping out the intake box that could indicate valve-train/lifter issues that would get metal down in the LPOP?
from what I read, LPOP is regulated to 70 psi
What is your ICP/IPR at hot idle? Typical should be ~550-600psig and 23-25% IPR
I don't remeber exact numbers but in that range
Are you able to load the motor beyond the points given?
If I drive 5 minutes close to 2000 rpms the icp drops below 200 and ipr is 77ish. the gauge I have rigged up is at 20 psi and the truck bucks , I beleive the LPOP is not keeping the resivoir filled
Have you pulled and inspected the IPR valve?
I havent pulled the ipr, although it's not too old got a screaming deal on craigslist.
Any thumping out the intake box that could indicate valve-train/lifter issues that would get metal down in the LPOP?
I'll pull the ipr when I can.
thanks
#11
05-26-2016, 10:02 PM
Fleet Mechanic
As far as the pressure goes think about where you are taking the reading. It is just about at the end of the curcuit. Pressures would be higher at the crank and cooling jets. As long as it is above 10 psig at any time I would not get too concerned. As long as there is pressure there there should be oil to the hpop sump.
#12
06-08-2016, 04:39 PM
pulled the ipr. the plug was a little melted and I broke the screen trying to look into it.
ordered and installed a new one. runs pretty good warm not hot though still does the stalling thing.
new thing it started doing is at startup the idle is a little high but ipr is 30+, icp is 875-900 and icv is 1.8-2, rpms at 1000. It sounds like a lopey big block idle. doesn't do it all the time.
the diesel place I had scan it said the desired icv is higher than actual??? also he had a hard time keeping communications with the truck. once in a while the scangauge will freeze or display only a few pids like voltage or rpms. anything else is blank.
ordered and installed a new one. runs pretty good warm not hot though still does the stalling thing.
new thing it started doing is at startup the idle is a little high but ipr is 30+, icp is 875-900 and icv is 1.8-2, rpms at 1000. It sounds like a lopey big block idle. doesn't do it all the time.
the diesel place I had scan it said the desired icv is higher than actual??? also he had a hard time keeping communications with the truck. once in a while the scangauge will freeze or display only a few pids like voltage or rpms. anything else is blank.
#13
06-08-2016, 04:46 PM
As far as the pressure goes think about where you are taking the reading. It is just about at the end of the curcuit. Pressures would be higher at the crank and cooling jets. As long as it is above 10 psig at any time I would not get too concerned. As long as there is pressure there there should be oil to the hpop sump.
from the way I'm reading the 6.0 bible schematic, the eot port is at the begining of the circuit.
I could very well be wrong.
