Don't think much changed with the issue with your injector data. Did a pretty good log with multiple throttles at different percentages and still get the same lean spike. Did a couple WOT in PE towards the end and still get the spikes there also. Very strange issue indeed.
This one has your MAF mostly dialed back in. Looks like it goes up to 7% lean right at 2500 even though I see nothing changing to tell it to right there. This one also has that different torque model, but don't think that'll fix it as I'm starting to believe it's something OS specific since so many don't do this.
Add as many more pids as you can to the channels. Torque management, airflow and fuel related primarily.
If the problem will stay there - hold constant pedal at 2500 too. Want to see if it's a rpm changing issue as the revs pass through it or just specific rpm area issue.
Last edited by GHuggins; 05-18-2023 at 07:59 PM.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
I just read that whole thread. They say "injector scaling", but what I'm almost certain they're talking about is having the fueling dialed in which would work around the problem... It honestly looks like certain cars have certain OS's that are doing something right there.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
First off I just want to say thank you so much for taking time out of your day for helping with this. It is greatly appreciated. Looks like the issue is still present. It does only seem to happen when passing 2500rpm at say 25-40% throttle. If I pass that rpm with very light throttle its fine. Holding it at that RPM it seems to run at stoich. You did seem to get my maf dialed in because fueling is pretty spot on again. I added as many PID's as I could think of, was not exactly sure what ones you wanted to see.
So if you're holding throttle or very lightly passing through that rpm it's fine - just when passing through it heavily the problem is there if I understand it correctly. Torque was the only thing I've seen changing much in the logs - dips down right at the problem then goes back up. Was hoping that model would help, but it didn't. I assume the VE table has been dialed in with MAF failed? What happens if you run a stock VE table?
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
I think I've been looking at this from the wrong point of view. Let me ask this - did it feel better this last time cause it looked like a normal check (that shouldn't be happening with the settings the way they are) and because of the injectors it's causing a "larger" swing but at least this time it looked like the ecm was controlling it better...
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
I'm pretty sure it's an exhaust test that shouldn't necessarily be happening or just an O2 sanity check. If you look at the last log you posted right after it happens bank to bank fueling changes then goes back to normal. It follows normal O2 testing characteristics. Problem is we've thrown in big injectors so now what should be small un-noticed swings are not only noticed but being felt. Might explain why it does it first thing in open loop too.
Just a theory I know, but what I'm seeing. Also when I tune these I tune in the O2's for the exhaust changes. Maybe why I haven't necessarily noticed it. Don't know?
This one has the MAF finer tuned and O2's changed.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Would something like this also cause the spike at WOT when in PE? Tried your new tune and still has the issue. I can still feel the TQ dip, car feels like it loses power right at the spike and then power immediately comes back in. I then tried a stock VVE table and still have the same issue. The maf seems really dialed in now though. Here are two quick logs. Log3 is your latest tune file. Log4 is you previous file but stock VVE table.
O2's won't be while in PE. Don't know on that one. It's also not the MAF cal as different gears put it in different loads. Funny thing is I haven't found anything on a ZL1 doing this, but the manual CTSV's seem to be the only ones. I put some ZL differences into this one but again don't have hopes. I think the problem is still rationality check or something it's doing and the bigger injectors are throwing it off.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Greg- Mine is an auto. I sent you my last log and tune. But I have ID850's
Last edited by PGA2B; 05-19-2023 at 07:49 AM.
2013 OBM A6 CTS-V Coupe
Mods: Headers back Billy Boat Exhaust, GripTec 2.65, 8.6 PowerBond Lower, LSX Innovations Solid Isolator, ID850's, NGK TR7IX's, Accel 9070CK Wires, Spectre CAI, SRI Ported Throttle Body, SRI Catch Can, NGK AFRM, 160* T-Stat, 0fx2gv Brick, Hard Line Delete W/3/4" Lines, FB 101 FMIC, Pierberg CWA50, Stoptech Drilled/Slotted Rotors, EBC Redstuff, Cut Stock Springs, Flat Bottom Steering Wheel
2006 Black Raven STS-V (Traded In)
Fully Modded: 459RWHP@5888rpm/451lbft@4696rpm
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Those settings are from my stock tune. I have not touched anything under fuel system. I just compared to a stock tune from the repository for a 2015 manual and those settings are empty. I also notice a lot of other stuff has little small changes that dont match my stock tune. My car was 100% stock when I got it but for some reason some of my settings are slightly different on a lot of stuff you normally dont touch.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Specific rpm in PE? I may have overlooked it in PGA2B's log. Was waiting to hear back from him. Short of purposely putting in the wrong injector data and skewing things I'm not entirely sure on it yet. Wish I could get in and look at coding to see what's primarily different between these and the ZL's.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC