Another Oil Pressure Sensor Nightmare..
Thread Starter
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Another Oil Pressure Sensor Nightmare..
Ok, my pressure sensor died and was pegged at the highest reading. I decide to forego the Oil Pressure Relocation.. I bit the bullet an went the standard route..
Pulled the intake.. cleaned up while in there.. Also I replaced the Intake Manifold Gaskets with a new set from Felpro ($21 at Autozone)
Put it all back together and change the oil.. Start it up.. I have very little pressure.. like 5lbs..
Take it for a drive and it goes to about 22lbs.. At wot it got to about 39ish.. As soon as I come back to idle it sets off the DIC with errors.. Oil Pressure Low like 5lbs
I am like MF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GD
:wil ly:
I have to do this ALL OVER AGAIN!!!!
I guess it was the Piece of SCHIT sensor I bought on Ebay.. This was the Aluminum one..
Is it possible its just an air bubble or sonthin? will it work itself out? If not I am going to do the relocation mod this time..
:
Pulled the intake.. cleaned up while in there.. Also I replaced the Intake Manifold Gaskets with a new set from Felpro ($21 at Autozone)
Put it all back together and change the oil.. Start it up.. I have very little pressure.. like 5lbs..
Take it for a drive and it goes to about 22lbs.. At wot it got to about 39ish.. As soon as I come back to idle it sets off the DIC with errors.. Oil Pressure Low like 5lbs
I am like MF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GDMF MF MF CS CS CS GD GD GD
:wil ly:I have to do this ALL OVER AGAIN!!!!
I guess it was the Piece of SCHIT sensor I bought on Ebay.. This was the Aluminum one..
Is it possible its just an air bubble or sonthin? will it work itself out? If not I am going to do the relocation mod this time..
:
Burning Brakes
Joined: Aug 2007
Posts: 831
Likes: 2
From: Houston Texas
Ouch - that's not good. Maybe check all the wiring to make sure it connected up right?
If I ever have to do mine - the relocation route sounds like the way to go to get that bugger out in plain sight.
If I ever have to do mine - the relocation route sounds like the way to go to get that bugger out in plain sight.
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
Tech Contributor
Joined: Jan 2007
Posts: 19,422
Likes: 1,146
From: Dyer, IN
Unfortunately, GM did have a run of bad replacement sensors for some time. The replacements were made of aluminum, so that's where the association came from. Considering what is required to change the sensor, few guys elected to take the bad sensor back to the dealership parts department, and instead....ate the $60, and purchased aftermarket...Borg Warner, etc. As a result, GM had very little visibility of the bad sensors, and no initiative was enacted to quarantine the lot of material.
Thread Starter
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Hey dude long time. 
Went for a ride tonight. Forthe first 10 minutes we had about 20 psi at idle and 30 at 2000 rpms. Then it dropped and dropped and set off the dic alarm. MFer!
Then parked the car went for a bite. Again it came back for a little then dies out.
That chime is maddening! It was better with the old sensor that read te highest reading and does not set off the errors. I need to fix this again!
Soooo what sensor can I rely on this time?????
Went for a ride tonight. Forthe first 10 minutes we had about 20 psi at idle and 30 at 2000 rpms. Then it dropped and dropped and set off the dic alarm. MFer!
Then parked the car went for a bite. Again it came back for a little then dies out.
That chime is maddening! It was better with the old sensor that read te highest reading and does not set off the errors. I need to fix this again!
Soooo what sensor can I rely on this time?????
Team Owner
Joined: Jul 2006
Posts: 22,167
Likes: 4,172
From: Kannapolis NC
Sounds like you did the cut a hole in the cowl method, not the relocation method. There's a big difference.
Drifting
Joined: Feb 2007
Posts: 1,793
Likes: 7
From: Santa Maria Ca.
Hey dude long time.
Went for a ride tonight. Forthe first 10 minutes we had about 20 psi at idle and 30 at 2000 rpms. Then it dropped and dropped and set off the dic alarm. MFer!
Then parked the car went for a bite. Again it came back for a little then dies out.
That chime is maddening! It was better with the old sensor that read te highest reading and does not set off the errors. I need to fix this again!
Soooo what sensor can I rely on this time?????
Went for a ride tonight. Forthe first 10 minutes we had about 20 psi at idle and 30 at 2000 rpms. Then it dropped and dropped and set off the dic alarm. MFer!
Then parked the car went for a bite. Again it came back for a little then dies out.
That chime is maddening! It was better with the old sensor that read te highest reading and does not set off the errors. I need to fix this again!
Soooo what sensor can I rely on this time?????
I just installed one from WCC-so next time it'll be a ten minute job.
The WCC unit also comes with a brass Buick sending unit-not sure if they're any better,but the one I just installed works like a charm...
You might think about changing the pass. side air check valve while you're in there - "fortunately" for me,the air check valve started throwing codes a week before the oil pressure sending unit took a dump,so I did them both @ the same time-air check valve is like ten bucks or so,and a ***** to change without pulling the intake.
Last edited by Carcass; Jun 12, 2011 at 09:49 PM.
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Racer
Joined: Jul 2007
Posts: 469
Likes: 0
From: Salt Lake City Utah
I also got a oil pressure sensor from O'Reillys that is used in Nascar (not sure what brand, but i think it's Borg Warner). Mine is working fine now and did not go with the cutting of the cowl. I went the long route and disconnected all the wiring, coolant lines to the throtle body and moved the intake out. I did keep the fuel line connected and just moved the intake over to the drivers side carefully. The thing that I forgot was putting the straw hose in back of the intake and kept getting a code. I had to take the whole intake off 3 times until I figured it out. If I ever have to change the oil pressure sensor again, I can do it very quickly now. Plus it allowed me to clean under the intake for excessive blowby.
Good Luck and I know you can fix it.
Good Luck and I know you can fix it.
Thread Starter
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Melting Slicks
Joined: Oct 2007
Posts: 2,375
Likes: 426
I bought one from Gene at GM Parts House. It's aluminum and has been working fine since January.
It replaced the original one from 1998. Apparently they knew how to make them at one time. Here's hoping they got it right again.
It replaced the original one from 1998. Apparently they knew how to make them at one time. Here's hoping they got it right again.
Thread Starter
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
He brings me back..... An Aluminum one clearly marked made in mexico.. I said no thanks! Not going that route again..
Soooo.. Are all the aluminum ones bad? Where can I go to get a Reliable one?
:
Tech Contributor
Joined: Jan 2007
Posts: 19,422
Likes: 1,146
From: Dyer, IN
No, they are not. I replaced mine 2 years ago, with an aluminum one....still going strong. Reality....you purchased yours from ebay. Which means someone probably bought them at a dealer auction(as is) for pennies on the dollar......because the dealer could not sell them. If a factory replacement scares you, then pick up a Borg Warner from Autozone, Advance, etc.
