Zero oil pressure, need some help
Thread Starter
Registered User
Joined: Dec 2000
Posts: 32
From: East TN
*Update* Zero oil pressure, need some help
So the oil pressure guage is at zero.
When I'd take the key out of the ignition, the guage would rise to about 20-25psi, then as soon as I turn the key to run, it would drop to zero. I started it a 3-4 times all the while reading zero, and on the last try I heard ticking and turned it off and left it set.
Full of oil, I checked that the first time I cranked it, and it started and still read zero.
The fact the guage moved off of zero while setting makes me think it's not the guage, and the slight ticking on the last attempt is sickening. I probably should have said **** it and left it set the first time it read zero, but I was stubborn.
Leaving work the check guages light came on. I saw zero oil pressure, cut the engine instantly in the middle of the road. Stopped, checked, and started it back up and it read 40-45psi, so I thought the guage was just going out. Damnit.
So know to diagnose the problem, because from previous posts on the subject I know it could be any number of things.
1) Sending unit is bad. I haven't done an intake swap though to hurt this sensor.
2) Oil pump is bad
3) Spun bearing
I've posted this on a few boards, just trying to get some input by anyone who's been down this road, and knows first hand.
Any help is appriciated.
*UPDATE*
Installed a new oil pump and sending unit.
When I'd take the key out of the ignition, the guage would rise to about 20-25psi, then as soon as I turn the key to run, it would drop to zero. I started it a 3-4 times all the while reading zero, and on the last try I heard ticking and turned it off and left it set.
Full of oil, I checked that the first time I cranked it, and it started and still read zero.
The fact the guage moved off of zero while setting makes me think it's not the guage, and the slight ticking on the last attempt is sickening. I probably should have said **** it and left it set the first time it read zero, but I was stubborn.
Leaving work the check guages light came on. I saw zero oil pressure, cut the engine instantly in the middle of the road. Stopped, checked, and started it back up and it read 40-45psi, so I thought the guage was just going out. Damnit.
So know to diagnose the problem, because from previous posts on the subject I know it could be any number of things.
1) Sending unit is bad. I haven't done an intake swap though to hurt this sensor.
2) Oil pump is bad
3) Spun bearing
I've posted this on a few boards, just trying to get some input by anyone who's been down this road, and knows first hand.
Any help is appriciated.
*UPDATE*
Installed a new oil pump and sending unit.
Last edited by FAST LS1; Aug 8, 2005 at 06:56 PM.
Registered User
Joined: Apr 2000
Posts: 948
From: In The Engine Room
Re: Zero oil pressure, need some help
You can test the oil pressure with a mechanical gauge. If you do not have access to one most Auto Zones have one they rent out.
Right above the oil filter on the side of the oil pan is where you connect the tester. That will give you the true oil pressure reading directly off the pump.
Right above the oil filter on the side of the oil pan is where you connect the tester. That will give you the true oil pressure reading directly off the pump.
Thread Starter
Registered User
Joined: Dec 2000
Posts: 32
From: East TN
Re: Zero oil pressure, need some help
Is there a tapped hole in the oil diverter plate?
I don't really want to have to tap and plug a hole just to mechanically test the pressure. That and I don't really want to turn the engine over any more if the pump has actually failed.
I think I'm going to drain the oil, and take off the filter to check them for any shavings.
Then try to test the oil sending unit with a multitester somehow.
I don't really want to have to tap and plug a hole just to mechanically test the pressure. That and I don't really want to turn the engine over any more if the pump has actually failed.
I think I'm going to drain the oil, and take off the filter to check them for any shavings.
Then try to test the oil sending unit with a multitester somehow.
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