Problems with Oil pressure
Thread Starter
8th Gear
Joined: Nov 2012
Posts: 8
Likes: 0
Problems with Oil pressure
When I bought the car, the oil pressure was w-a-y t-o-o high and I knew I needed to replace the oil sending unit. After doing just that, I haven't had the chance to drive it yet. But I did start it up several times through out the past several months and EVERYTHING was normal including oil pressure. Today I washed the motor detailing, every square inch of the motor and after doing that I noticed it doesn't have any oil pressure. So I shut the car off. Fifteen minutes later I started it up again and then I had good oil pressure. I thought to myself, something must have gotten wet and it will pass so I heated up the engine. I let it run for 30 minutes and then turned it off. Next day I started it up again and I had no oil pressure. I let the car run for 5 minutes when it had no oil pressure.
I read on another Forum if it remains at "0" it can't be the oil pump.
It's now the third day and it still has the same intermittent problem. Help!! I have had the car running several times thereafter and no knocking. It must be electrical somewhere. Please help.
I read on another Forum if it remains at "0" it can't be the oil pump.
It's now the third day and it still has the same intermittent problem. Help!! I have had the car running several times thereafter and no knocking. It must be electrical somewhere. Please help.
Drifting
Joined: Jan 2012
Posts: 1,341
Likes: 8
From: Hopatcong New Jersey
If it truly had 0 oil pressure you would have known long before the 5 minutes you let it run that it had 0 oil pressure. My vote is for bad sending unit. You wouldn't be the first person who had a new sending unit crap out on them shortly after replacing it. First thing I would do is hook up a mechanical gauge, then I would check the sending unit's electrical connector/wires, then I would replace the sending unit.
Team Owner
Joined: Jan 2007
Posts: 29,065
Likes: 1,839
From: cookeville tennessee
If it truly had 0 oil pressure you would have known long before the 5 minutes you let it run that it had 0 oil pressure. My vote is for bad sending unit. You wouldn't be the first person who had a new sending unit crap out on them shortly after replacing it. First thing I would do is hook up a mechanical gauge, then I would check the sending unit's electrical connector/wires, then I would replace the sending unit.
Thread Starter
8th Gear
Joined: Nov 2012
Posts: 8
Likes: 0
When I bought the car, THIS Corvette Forum website has been most helpful with fixing and diagnosing any problems this car had. As much as I truly want to believe it's the sending unit like you guys say, I just find it very weird that if I wait 15 min and start up the car again, it will work fine. When talking to the Service Tech at the Dealer ship, they said it might be the PC under the battery compartment.
I'll replace the sending unit this week (because it's much cheaper then the PC) and at same time I'll be adding a manual gauge. It's NOT a good feeling seeing the oil pressure at "0".
I'll replace the sending unit this week (because it's much cheaper then the PC) and at same time I'll be adding a manual gauge. It's NOT a good feeling seeing the oil pressure at "0".
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Almost all your sensors (except the crank and cam sensors) use a 5 VDC reference voltage on one side of the sensor. Your Oil Pressure Sensor is one of them. If there is water in the connector or any 5 VDC reference sensor, it won work. My recommendation would be to disconnect each one and dry it out and insect the female pins. Make sure that the female are NOT SPREAD APART and they are making positive contact with the male pin.
When you wash your engine, you risk filling the KNOCK SENSOR wells under the intake manifold with water. If you get any Knock sensor DTCs,, suspect water.
BC
When you wash your engine, you risk filling the KNOCK SENSOR wells under the intake manifold with water. If you get any Knock sensor DTCs,, suspect water.
BC
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