High Oil Pressure
Thread Starter
Racer
Joined: Dec 2005
Posts: 401
Likes: 11
From: Hertford NC
High Oil Pressure
I changed the oil in my 2006 Corvette today. Used Mobel One 5-30 with Fram PH 3506 filter. When I restarted the engine after the oil change, I got 78 PSI oil pressure at idle. After oil came to temp the pressure is still 66 PSI at idle and 91 psi at 3,000RPM. Before my oil pressure was about 36 PSI at idle. Could the new filter be defective and blocking oil flow? Any other suggestions or answers?
Le Mans Master<br><img src="/forums/images/ranks/5k-6k.gif" border="0">
Joined: May 2007
Posts: 5,404
Likes: 1
St. Jude Donor '08-'09
Interesting. I thought oil filters had a high pressure bypass that prevented a blocked filter from blocking flow. Not sure if that's true or not but it does sound like you have a problem.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
I think that the oil pressure sensor is at fault or beginning to fail. The part is 40 bucks and I have one that I know is good. To eliminate the variable I would install it for you to see. If there was no change then you move on down the list. It would make sense to get another oil change and see if it fixes the problem.
There would be no chanrge if youwere local but no one knows where you are to even offer since it seems that not a single new member ever fills out the bio informatin which is an issue wen you ask for help, recomendations of a tuner or parts place. Why dont you fill out the bio info? You cant buy or sell anything in the parts section either without listing your location.
There would be no chanrge if youwere local but no one knows where you are to even offer since it seems that not a single new member ever fills out the bio informatin which is an issue wen you ask for help, recomendations of a tuner or parts place. Why dont you fill out the bio info? You cant buy or sell anything in the parts section either without listing your location.
Team Owner
Joined: Nov 2006
Posts: 21,136
Likes: 212
From: Long Island New York
Word around here is Fram is one of the worst filters sold. There was a test done that I read months ago saying the same thing. That might not be your problem but I would get that thing off your car.
Team Owner
Joined: Oct 2004
Posts: 27,420
Likes: 64
From: San Clemente CA
In addition I would drive it a few miles and see if it returns to normal. If not take it to the dealer.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Safety Car
Joined: Jul 2001
Posts: 4,456
Likes: 6
From: Spicewood, Texas, USA TX-Texas
I would probably change the oil again using Mobil 1 and a fresh AC filter...this is something you can do and fairly cheaply to avoid a dealer visit. I have only seen this happen with cold oil and high engine speed.
Read the owner's manual to be SURE you are using the proper AC filter. After you remove the oil filter, inspect the filter adapter carefully for obstruction, debris, or anything out of the ordinary. Before opening the oil containers, inspect oil for tampering...I've seen some weird stuff done by people.
I suppose it's possible for the oil pressure sensor to be out of calibration, but remain within the extreme normal operating range...in that case, no codes would be set. If the sensor fails completely, you will get a code.
Read the owner's manual to be SURE you are using the proper AC filter. After you remove the oil filter, inspect the filter adapter carefully for obstruction, debris, or anything out of the ordinary. Before opening the oil containers, inspect oil for tampering...I've seen some weird stuff done by people.
I suppose it's possible for the oil pressure sensor to be out of calibration, but remain within the extreme normal operating range...in that case, no codes would be set. If the sensor fails completely, you will get a code.
Safety Car
Joined: Jul 2001
Posts: 4,456
Likes: 6
From: Spicewood, Texas, USA TX-Texas
P0521 - DTC is set when ECM does not detect a change in engine oil pressure of at least 5 psi over a predetermined variance of engine speed.
P0522 - DTC is set when ECM detects that the EOP sensor signal circuit is less than 0.4 volts for greater than 10 seconds.
P0523 - DTC is set when ECM detcts that the EOP sensor signal circuit is greater than 4.6 volts for greater than 9 seconds.
If you didn't get a code set, the only explanation is that the EOP was continuing to send a variable signal between 0.4 and 4.6 volts, or the ECM somehow overlooked the condition. To understand how, or if, such a signal would read on the dash gage would require understanding the sensor output calibration, and I haven't done that research yet.
