oil pressure problems
- Thread starter tommyh
- Start date
ironpony
Professional Pot-Stirrer
Get an oil analysis first... the wear metals will tell you something about where to look.
mndriver
curmudgeon extraordinare
Cam bearing and crank bearings are the biggest culprit for loss of oil pressure.
Otherwise it would be your oil pump itself.
The symptoms you describe...
Now that you've gotten a clean oil sample. Your oil filters are clear.
I'd have a shop drop the oil pump and measure it for specifications. Have the oil pressure relief valve tested too.
I'd also consider having a mechanical gauge temporarily installed to verify the ecm reading is correct. I'd probably start here first before opening the engine up.
If the mechanical gauge and dash are different, I'd replace the sending unit
Otherwise it would be your oil pump itself.
The symptoms you describe...
Now that you've gotten a clean oil sample. Your oil filters are clear.
I'd have a shop drop the oil pump and measure it for specifications. Have the oil pressure relief valve tested too.
I'd also consider having a mechanical gauge temporarily installed to verify the ecm reading is correct. I'd probably start here first before opening the engine up.
If the mechanical gauge and dash are different, I'd replace the sending unit
Ontario Outlaw
Hozer Witta Hood
That’s sound advice. It doesn’t apply in this case, but for temps a heat gun helps verify gauge accuracy. You can’t always trust the gauges. It helps if you’ve been driving the truck for awhile and know what “normal” is on the gauges.
mndriver
curmudgeon extraordinare
Oil pressure....
His issue is his oil pressure changed from what he's used to seeing. Why?
His oil sample is good.
His oil filters are showing clean still.
Next up is verify the sending unit and gauge are correct.
If they are, then that leads to invasive inspection.
Ontario Outlaw
Hozer Witta Hood
I read that, and was commenting on verifying gauge accuracy. What you said was good advice and I’m following along to learn
I’ve had to hook up a mechanical gauge to check air gauges in the dash, as well as used a temp gun to help diagnose a bad gauge or a bad sending unit. Hooking up a mechanical oil pressure gauge to check the dash oil pressure gauge is a great idea
tommyh
Well-Known Member
update
oil and filter changed recently,oil pressure seems to have leveled off.I plan on sending in a new sample this week.
Thursday evening I was on my way to work,bobtailing and the truck started acting up..Full power untill I hit 30-35 mph
then loss of power
came back home,changed fuel filters,same thing
since it was dark then,I got up early Friday and went to have it hooked up to a computer....guy had a snap on computer,it read
5 volt 3 wire sensor.There lot of those on my motor..
turns out it was the IVA oil pressure sensor,replaced it 175.00 and running fine now
I`m still going to carry on with the other problem
oil and filter changed recently,oil pressure seems to have leveled off.I plan on sending in a new sample this week.
Thursday evening I was on my way to work,bobtailing and the truck started acting up..Full power untill I hit 30-35 mph
then loss of power
came back home,changed fuel filters,same thing
since it was dark then,I got up early Friday and went to have it hooked up to a computer....guy had a snap on computer,it read
5 volt 3 wire sensor.There lot of those on my motor..
turns out it was the IVA oil pressure sensor,replaced it 175.00 and running fine now
I`m still going to carry on with the other problem
