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Oil Pressure Crazy...urgent need help!!!
- Thread starter vajeeper
- Start date
langer1
NAXJA Forum User
- Location
- Mineral City,Ohio
Get rid of your Fram filter.
scorpio_vette
NAXJA Forum User
- Location
- Milwaukee Wisconsin
either replace the oil pressure sending unit, or go to autozone and buy a oil/trans pressure tester.
take out the pressure sending unit, install the tester and run the hose with the gauge up to the windshield. start it up and see what it reads. most likely it's your sending unit or the wire connected to it.
take out the pressure sending unit, install the tester and run the hose with the gauge up to the windshield. start it up and see what it reads. most likely it's your sending unit or the wire connected to it.
langer1
NAXJA Forum User
- Location
- Mineral City,Ohio
No one can be sure of anything unless you make the tests you were told to.vajeeper said:
scorpio_vette
NAXJA Forum User
- Location
- Milwaukee Wisconsin
you want to figure it out as soon as possible incase there is actually a oil pressure problem.
but the wacky gauge is relatively common. i've seen it on almost every xj i've ever been around at one point and time. in my cause it was the connecter that was loose. on my friends Xj it was a bad sensor, and so on and so forth.
if you want to make sure, then get the tester like i said above.
if you want to go with what works 90% of the time then just buy a new sending unit. go to www.autozone.com and look up the price there.
but the wacky gauge is relatively common. i've seen it on almost every xj i've ever been around at one point and time. in my cause it was the connecter that was loose. on my friends Xj it was a bad sensor, and so on and so forth.
if you want to make sure, then get the tester like i said above.
if you want to go with what works 90% of the time then just buy a new sending unit. go to www.autozone.com and look up the price there.
Digger87xj
NAXJA Forum User
- Location
- Buffalo Creek/Lakewood CO
a whacked out oil pressure sending unit is the typical culprit for that problem.
replace it and be worry-free!
replace it and be worry-free!
RichP
NAXJA Forum User
- Location
- Effort, Pa
All the oil pump is is two gears that turn and move oil, I was taught to call them IMO's for I move oil. They will pump at inifinate pressure, we used them to charge 50000lb hydraulics for our stern planes, rudder and fairwater planes. The pressure is regulated by the size of the tubes, how fast it passes thru the motor, etc, if it gets too high from say a filter clogged or plugged the bypass kicks in to bypass the filter. Your 40lbs is not high but from your description I'd first clean the contacts on the plug, then if that does not fix it get a new sender. Also make sure they sell you the correct sender, there are two types, a sender and a switch type for the idiot light.
- Location
- Roanoke VA
I'd bet the sender is bad, I think they are around $30 at Advance. Where are you at in VA?
Flyin
NAXJA Forum User
- Location
- Holland, MI
I had the same problem on my '87. 0psi @ idle & low RPM cruize, also noticed that the oil pressure would go up when I let off the gas. Replaced the inaccurate factory setup with a mechanical Autometer gague (45$). Now I KNOW what my oil pressure is. 130,000mi motor 10psi @ hot idle (400-500RPM)& 40psi by 2000RPM.
FYI 10 psi per 1000RPM is plenty good.
FYI 10 psi per 1000RPM is plenty good.
RichP
NAXJA Forum User
- Location
- Effort, Pa
Right by your oil filter where it screwsin, it's the long thin stubby thinger with the wires on the end..about 3" long or so...
langer1
NAXJA Forum User
- Location
- Mineral City,Ohio
Been there several times for the Mopar Nationals.vajeeper said:
- Location
- Roanoke VA
vajeeper I'm to far away to help in person, about 2 1/2 hrs from Bristol to Roanoke. That sender is threaded into the block next to or above the filter/adaptor. Should be a plug in connector attached with a couple of wires. Make sure you use some Teflon(Don't go to heavy with the tape or the sensor won't read due to bad ground) pipe tape on the threads when you put the new one(sender) in to prevent a future leak. You can test your oil pressure at this same port if you still have problems with the pressure after trying a new sender. From my experiance the sender is most likely the problem though.
Last edited:
JJacobs
NAXJA Forum User
- Location
- Fort Collins CO
Just change it already- it's a one-wrench job. You might get a couple drips on the floor, nothing major.
