Oil pressure shenanigans?? Should I be sweating?

[ls3 Grenadier]

Originally Posted by acutron42

L99 or LS3?

LS3

[morepowerjoe]

I’m probably picking at nothing here but, could that possibly have anything to do with it?

Also remember it’s not an issue that’s been constant, which if it were any seal
Problems I would assume my issue would be persistent..[/QUOTE]

yeah your probably right

[acutron42]

Strange that it is intermittent. It seems like when the pressure hits 50 it gets bypassed & builds again. What oil filters do you use. Could it be the bypass valve acting up with the melling pump? That is unlikely but just throwing it out there.

[RACERJOE1]

Possible the wiring harness may have been damaged during engine removal and install???
May want to install a mechanical pressure gauge to see the actual pressure to rule out possible electrical issue....just a thought.

[ls3 Grenadier]

Originally Posted by acutron42

Strange that it is intermittent. It seems like when the pressure hits 50 it gets bypassed & builds again. What oil filters do you use. Could it be the bypass valve acting up with the melling pump? That is unlikely but just throwing it out there.

I usually run Ac Delco or mobile 1 filters and I wouldn’t even begin to know about the bypass system acting up. That’s something I’ll have to look into or have someone chime in and educate us layman.

[ls3 Grenadier]

Originally Posted by RACERJOE1

Possible the wiring harness may have been damaged during engine removal and install???
May want to install a mechanical pressure gauge to rule out possible electrical issue....just a thought.

You know what actually yes.. this might sound very stupid coming from me but just yesterday I was smelling burnt plastic and I come to find out after investigating that my passenger upper o2 sensor connector was taking a nap on my header… it did pop an 02 fuse which I replaced(was fine after). However, that wire loom could house the wire that leads to the pressure sending unit. and it could have been going on for weeks as far as I know.

Are you suspecting the sending unit wire is damaged or something else?

[Aqua Blue RS/SS]

When you replaced the barbell in the block did you go with plastic or billet? In my experience the billet is a much better piece. I’m wondering if you don’t have a pump relief issue. Since your not an L99 you don’t have to worry about the relief in the pan. I wouldn’t be inclined to think it’s a burned wire for the sending unit as it reads normal most of the time once a wire burns, it burns, know what I mean?

Edit: actually I think I may remember the LS3 having the relief in the pan even though it’s not necessary.

[ls3 Grenadier]

Originally Posted by Aqua Blue RS/SS

When you replaced the barbell in the block did you go with plastic or billet? In my experience the billet is a much better piece. I’m wondering if you don’t have a pump relief issue. Since your not an L99 you don’t have to worry about the relief in the pan. I wouldn’t be inclined to think it’s a burned wire for the sending unit as it reads normal most of the time once a wire burns, it burns, know what I mean?

Edit: actually I think I may remember the LS3 having the relief in the pan even though it’s not necessary.

I’m positive it’s a plastic barbell. My builder never mentioned anything about a billet one and I never opted for it.

[gtstorey]

Originally Posted by ls3 Grenadier

Thanks gt, but I skimmed through the first two pages but didn’t find anything. Do you remember what the title might have been?

https://www.camaro5.com/forums/showthread.php?t=597263

[PaulsSS]

Originally Posted by ls3 Grenadier

I filmed a vid to show you guys.. I just uploaded it so
The quality might be quite bad until it processes the higher quality but none the less here’s the link:

https://youtube.com/shorts/TMyrCsddwtc?feature=share

As soon as the video starts I start to slowly accelerate and you can see that it sort of stagnates and even goes down a little bit. It then starts to increase HOWEVER when I actually let off.. you see it spike to 50+ ? And as I start to accelerate again it goes back down. So I’m not sure if it’s just very delayed and inaccurate or what’s going on. The reason I’m confused is because it never used to do that.

I had a Ls1 TA that did the same thing for 140k miles till I sold it. Never had a problem with it. Did concern me at 1st but I just forgot about after 140k miles. I'm not sure because I never checked it but someone told to check the crank end play, excessive end play can cause the crank walk back and forth and you can see it in the oil pressure readings. But who really knows, could simply be the electrical system, sensor etc. so many things to worry over.

[RACERJOE1]

Possible, but temporarily installing a mechanical gauge would rule out whether it's electrical or actually a mechanical issue.

[2010RSIOM]

So, just watched the video you posted of the gauge. It is interesting to me, and just throwing this out there, but it is acting like the gauge is wired backwards. Under acceleration, the oil pressure drops when it should increase...under decel, the oil pressure rises. Strange. Mine (it's an LLT) idles at about 35 to 40 and under acceleration, hits about 65. I know, different engine. Anyway, it is almost like your gauge is acting in reverse.

[Badbubba]

Originally Posted by Aqua Blue RS/SS

When you replaced the barbell in the block did you go with plastic or billet? In my experience the billet is a much better piece. I’m wondering if you don’t have a pump relief issue. Since your not an L99 you don’t have to worry about the relief in the pan. I wouldn’t be inclined to think it’s a burned wire for the sending unit as it reads normal most of the time once a wire burns, it burns, know what I mean?

Edit: actually I think I may remember the LS3 having the relief in the pan even though it’s not necessary.

Yes, same pan for the LS3 and L99. I see you edited your post. Was going to post last night, but got occupied. The relief is there for AFM and VVT function with the L99 and it's oil pump. The pressure relief in the pan is to be 55 psi.

[morepowerjoe]

Originally Posted by Badbubba

Yes, same pan for the LS3 and L99. I see you edited your post. Was going to post last night, but got occupied. The relief is there for AFM and VVT function with the L99 and it's oil pump. The pressure relief in the pan is to be 55 psi.

Yeah I thought the relief valve was set to 55 psi also. But after posting that I had multiple people tell me they regularly see over 55 psi on their engines. So after doing a lot of researching I actually found out it is set to 70 psi.