Have you guys with ctsv's seen this lean condition between 2500-3000 rpms? Does anyone know what causes it? You can see the fueling seems to become a little unstable around those rpms
Have you guys with ctsv's seen this lean condition between 2500-3000 rpms? Does anyone know what causes it? You can see the fueling seems to become a little unstable around those rpms
Is the fuel changing in reference to the o2 changes or due to another input? Could you have exhaust leaks? The screen shot does not allow for one to play the log. A log, charts, and some more setup info would be helpful.
I chased this for a while thinking I could fix it. No such luck. Didn't matter what I did- VVE boundaries with blended tune, maf-only with tuned VVE, maf-only with stock VVE, etc, etc. It always goes 0.03-0.05 lean (lambda) when you go through the 2500-2800 zone. I'd love to hear the fix if there is one. Others have had the same issue on this forum with no reported fix.
the quick jagged changes in your 02 value are a missfire but that is only from your WB data, your NB02's dont show it however that may be due to them being at the lean side already.
From the looks of it, it's one cylinder missfiring for whatever reason. Could it be overall general lean missfire? I doubt it. Where is the WB placed compared to your stock 02's? Left side, right side, looks like it's one or the other, not both.
Last edited by 10_SS; 04-27-2019 at 10:33 PM.
2010 Camaro LS3 (E38 ECU - Spark only). MS3X running complete RTT fuel control (wideband).
Whipple 2.9L, 3.875" Pulley, kit injectors, supplied MSD Boost-A-Pump, stock pump
LG Motorsports 1 7/8" Headers - No Cats, stock mid pipe with JBA Axle Back
ZL1 Wheels/Tires
If it was a missfire I would think i'd be able to feel it right? I have test pipes with my NB O2s in the locations that are on the pipe and my WB is in the 2nd bung on the drivers side. Passenger side 2nd bung is just plugged with one of the NB02 I'm no longer using (the one used for Cat testing).
I can't attached the log because it's too long...is there a way to shrink it or cut some of the drive off?
Use the +/- icons to zoom in to the duration you want to show (default is 30s each time a log is opened), then go to Log File > Export Log File, save the selection as a new filename.
screenshot.28-04-2019 13.56.35.png
I've confirmed that those areas aren't misfiring. I realize the easiest way to fix this is have the map trigger for PE come in sooner, but that still doesn't explain why the car goes lean in this area. Especially when the maf/vve are within +/-2%. Any other seasoned LSA tuners have a fix for this?
2500 rpm lean condition.hpl
Here is a clip of that lean condition happening again. It's not the same log as the screen shot i took, but it shows the problem I'm having. Does anyone know if it has something to do with the o2 sensors switching voltages?? I'm just guessing here...
Just chasing a theory here while grasping at straws: has your car ever been tuned with a SCT tuner?
log your inj PW and check that i dont see your file but maybe dynamic enable disable in those rpms?
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current tune... thanks guys for the help
Here's another log that's a little longer that you guys can take a look at that includes my inj. PW