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so on a 2017 gen v 5.3 has a oil pressure control solenoid, i have a psi wiring harness and they said it was wired in so can you change oil pressure in the tune up? reason i ask this 5.3 oil pressure is on the high side maxed out 80 lb gauge and from what i have read its on demand and will go to 87 lbs? what i want to know is how to get the oil pressure lower thanks in advance
come on tuners i know somebody has been here and done that, can you make it go to the low side and then hi side when on demand? someone has to know
There is no oil pressure table like that.
The calibration only gives us the oil pressure warning setting and the oil temp warning settings.
In a stock vehicle the oil pressure on the variable pump typically goes from 30-50 during normal driving and will get up around 60-65 at full throttle, atleast in my 5.3 it does. Seeing 80psi is a lot and likely not good for the AFM/DoD system, I know they put oil pressure relief valves in the oil trucks so oil pressure never got that high.
Usually when the sensor goes bad on the pump is will revert to running a higher oil pressure all the time.
this is a 2017 truck motor only had 17000 miles but i did have a camshaft put in it, and now i dont know how to lower the oil pressure, all that can be deleted has been or so i have been told, gotta figure out how to lower the oil pressure, thanks for your input
I would be very curious if the wiring got damaged that goes through the front cover to control the oil pump... or if it was unplugged and not plugged back in.
Was the oil pump properly aligned when the new cam was installed? Were the oil pump alignment "tools" utilized?Quote:
Originally Posted by outlaw3454
I swapped out an L83 cam for a stock LT4 cam, used the alignment tools and triple checked oil pump alignment before buttoning things back up. Oil pressure is spot-on identical to prior to swap.
There actually is a table that controls the state of the variable pressure oil pump solenoid, but it might not be available in this calibration.
But, in any event, I wouldn't suggest trying to lower the oil pressure by disabling the solenoid, the fact the oil pressure is too high is indicative of another issue that should be resolved.
Where is this calibration setting located?Quote:
Originally Posted by tunerpro
I 2nd this one. My l86 with a few hundred miles on it now still gets to 80PSI at high RPM WOT and the system is designed to fail to the high pressure side like 5FDP said. The wiring is on the timing cover and could have been damaged, left unhooked, or something related.Quote:
Originally Posted by MrFixIt86
If DOD hardware was removed and the stock HV oil pump was left in place, then your oil pressure will certainly increase. Especially if the pressure relief in the oil pan was also removed and plugged. High oil pressure isn't necessarily a bad thing, it creates more heat in the oil, decreases MPG's and horsepower, increases turning torque on the engine and has a potential to blow out oil filters if it get way too high or possibly put the filter in full bypass. Only way to fix that would be to tear it back down and replace the oil pump.
I think you are speaking of Gen4, right? Gen5 has a solenoid to control oil pressure/volume.Quote:
Originally Posted by danmw2003
Correct, my mistake. I had Gen 4 on the brain, I dont know much about the Gen 5's as I have no experience with them. Sorry my mistake.
I'm still wondering where this can be modified in the tune. My WOT runs to 6600/6700 rpms sees oil pressure at only 60. I'd much prefer this is closer to 80PSI, so I'd love to be able to make some adjustments. Anyone know where this calibration table is located? 2016 Camaro SS.
60psi is plenty of oil pressure.
60 may be as much as your pump can make. the 80 I have is with a new oil pump, bearings, and 5w30. I would be happy with 60 too.
If you want to test if you can make more than 60 psi... You can unplug the solenoid and then your pump will put out full volume and pressure because the solenoid is adjusting it down from max.
Quote:
Originally Posted by Dominatorstang
I wouldnt trust the gauge on the vehicle too much. I work for GM as a master tech. the oil pumps on these LT engines will push out 80 psi on a stock engine and will default to max pressure anytime the solenoid doesnt work. We see it alot when other places or people have had the front cover off and damage the wiring going thru the front cover, thus making the pump default to max. also, on a new pump you dont need the alignment tools, only if you take original off and plan on putting it back on. Im with them though, 60 psi is plenty.
Actually I think that table is used to control the pressure some how, I've seen many that are getting higher pressure but I also think there's another hidden table added by request from HPT or some people using different software. Correct me if I'm wrong.Quote:
Originally Posted by 5FDP
There are background tables to control the oil pressure.
There is a Base,and High desired tables.
Along with a minimum oil pressure table (used to control the switch to high mode)
There is also 2 tables for engine torque based oil pressure control.
I can locate these tables if anyone would like me to (gen 5)
Id love to have access these tables. I sent hpt an email request for them but prob wont get help.Quote:
Originally Posted by will_974
I just purchased the oil pump pressure control tables from your website now. Look forward to getting other Xdf options you offer. Glad I stumbled on this post. Working on dry sump engines, seems they only wanna hit about 40-50 psi.
If you can, Please post back here how the oil pressure tables i provided work.Quote:
Originally Posted by AvilaLSX
They currently only have a few people using them other than myself and may still have a couple kinks or clarifications to add
Good bad or ugly,
I dont have any secret information so everything i have found thus far is from digging and sifting and some educated guessing
Ok so I got to spend some time testing out changes to these tables while I tuned the car. This is a dry sump lt1 corvette gs. It has TSP el c7 cam and BTR trinity intake and more. 12.5:1 compression. This is the second one I?ve seen that sat in the 40-50psi range at higher rpm. Did it stock before mods and after.Quote:
Originally Posted by will_974
When I look at the high and base pressure tables, it seems it is what GM is commanding. I believe the high and low desired tables are models GM engineers set up for the ECU to know what to expect from this pump at different RPM & oil temp.
On the base/High tables I changed the rpm axis to extend up to 7500 rpm and commended the high side to get into the 70 psi range. It is not able to match what I am commanding. The oil pressure fluctuates worse as it tries to. It will hold the 45psi steady. Gets as high as 55 and fluctuates to 50-55.
What did work well was using the torque enable/disable settings. I can see an immediate spike to the high side at my requested torque.
The minimum table is set to like 2psi. I bumped it to 10 but I have not done enough testing to know how this table applies. If it is just a minimum to trigger an oil light? Idk.
I sent the tune with the oil pressure base/high tables back to stock values, but torque set to enable high pressure in the 4500/5500 rpm cells.
Thank you for the detailed feedback here.Quote:
Originally Posted by AvilaLSX
I appreciate the feedback that the oil pressure torque control tables work as expected, it was a long shot in the source to link them to engine torque.
I agree with you on the base and high desired tables, They appear just to give the ECM an idea of where the oil pressure should be.
The minimum table I have recently been calling the threshold table. In my experiments if you set the values in the table high (600kpa) ish, you should see the oil pressure switch to high mode in the cels you choose.
I have had multiple customers very happy with just this table before i identified the other ones.
Interesting...I had my LT1 rebuilt, DOD/VVT delete, but left the OEM stock oil pump. It is variable and it runs low pressure during lower RPMS. They go as low as 10-15 PSI during low RPMs.
Wondering if this could be tuned so it doesn't run so low pressure? Is that possible or am i mistaken about this post?
Thanks,
Pjs
For a long time now I have wanted access to oil pump tables to see GMs strategy. Thank you for making that possible. It seems like they are all reluctant to go to the high side IMO. I should?ve asked about the minimum table ahead of time to try that before sending the car. I did see your explanation in earlier posts but I didn?t make sense of it myself at that time.Quote:
Originally Posted by will_974
Look forward to testing more on future cars with all the extra tables you have to offer.
Maybe the motor was setup loose on clearances. Aluminum blocks tend to ?open up? more as they get warmed up. That is why the big split in these modern 0w40/5w50 oils (my opinion). Hopefully it shoots up with RPM. Maybe try a thicker oil. Maybe your builder already recommended something. 5w50 mobil1 supercar might be worth a shot.Quote:
Originally Posted by pjs
He did recommend thicker oil. I've been running 15w-50 ever since. Pressure does go up with RPMs, typically steady around 40 PSI. I'm just nervous about it being so low at idle and low RPMS, e.g. what if I decide to floor it, will pressure come up quick enough one day....Quote:
Originally Posted by AvilaLSX
Pjs
I just rebuilt a l83 with ls7 lifters and it seems to have some lifter noise when it’s in I would assume the low pressure table when I unplug the solenoid motor runs quite as a mouse. Where do i go to get access to those tables?
Recently HPT added oil pressure control tables to VCM editor.
They got the Engine Torque Enable and disable correct
[ECM] 28332 and [ECM] 28333
However, their implementation of the High,Low tables is incorrect.
[ECM] 26410
[ECM] 26411
It is offset by half a row.
Attachment 159877
HPT does not yet have the Minimum oil pressure Threshold table defined
They have enough for you to confidently use trq based controls to switch the oil pump into high mode.
However, until they add the table, they do not have the table to switch the oil pump into high mode based on engine rpm and temperature.
Note to HPT: I am happy to help you help the community by getting these tables defined correctly.
Please feel free to reach out and we can discuss.
Update 6-9-2025: HPT has fixed the High and Low desired pressure tables offset issue, but the Axis are still backwards
Hi will_974 ,Quote:
Originally Posted by will_974
In the latest beta, I'm seeing new oil pressure tables (attached). Do these new tables look correct to you? One table I don't see is "Oil Pressure High Desired" (table 50006). It looks like they did shift the values in [ECM] 26410 vs what you posted. My tune downloaded is from a 2019 Corvette Grand Sport with the LT1.
I'm wringing out a new 416 build that's for track days and Time Trial events and I'd like to run it at higher pressure in the upper rpm ranges. Experimenting with oil pressure changes on a race track is not real appealing! lol
Attachment 161291
They look correct as far as the data in them,
However the axis are still backwards.
the Nominal flow pressures are more for diagnostics as far as i can tell, they do not actually control the Oil pressure.
Where you want to look is under System->Variable Oil Pump
Where you will find the Enable and disable Torque thresholds along with some RPM limits that can help you achieve what you need.
I have not personaly tested HPTs new oil pressure tables in System->oil pump however I trust they did find the correct values.
The oil pressure threshold table that is more nuanced than a strict rpm limit Hp tuners does not have defined yet.
If the tables that HPT has defined in System do not work send me a PM and I will work with you to get the correct tables defined.
Quote:
Originally Posted by will_974
Thank you! That makes perfect sense. The axis looked backwards to me but I have the scars to prove that what seems logical isn't always the case.
I have an SCCA event this Saturday so I'll have a chance....weather permitting....to test the Torque thresholds. Currently I have the solenoid unplugged and the diagnostics turned off so I have a good baseline for what the high-side oil pressure should look like. I'm quirky I guess in that I like to have as much of the GM diagnostics turned "on" as possible.
I had a chance to do some street driving yesterday and as you state Will, going in under "System" and changing the thresholds keeps the pump running at high pressure.
I lowered the rpm threshold to 500 rpm and set the torque enable / disable thresholds to 101 and 138 respectively.
On my ~25 minute drives, I hit a range of data points just cruising around and going WOT up to ~5800rpm. The oil pressure with the solenoid connected (and using the aforementioned settings) looks just like the oil pressure with the solenoid disconnected (min, max, and averages pressures across the load and rpm spectrum). The DTCs are enabled, no CEL.
Looks like success!
Thanks!
Any harm in running it like that?
For context, mine is a totally built normally aspirated 416. 570 to the wheels
I've read in a few places....so take it for what it's worth....that GM did the variable oil pressure strategy for fuel economy. All ears if someone knows the real reason.
For a street car and/or something with a basically stock engine, I'm not sure I'd bother with changing it.
Mine is bone stock with the afm turned off, but all of the factory parts are still there. I used the same settings you posted, and ran it for about 100 miles, running 65-70 mph at low load with the cruise on it stays about 50 psi, I read in another post somewhere that over in countries without EPA incentives the cruising oil pressure is 45-50 psi. I got basically the same results that you did. But before the oil reaches operating temperature it gets a little over 70 psi under light acceleration. I'm going to leave it a while and see what happens, unless some one has a different opinion.Quote:
Originally Posted by 96GS007
Mine is bone stock with the afm turned off, but all of the factory parts are still there. I used the same settings you posted, and ran it for about 100 miles, running 65-70 mph at low load with the cruise on it stays about 50 psi, I read in another post somewhere that over in countries without EPA incentives the cruising oil pressure is 45-50 psi. I got basically the same results that you did. But before the oil reaches operating temperature it gets a little over 70 psi under light acceleration. I'm going to leave it a while and see what happens, unless some one has a different opinion.I'm hoping some of the experts chime in...Quote:
Originally Posted by 96GS007