efi live 4l60e tuning trans and engine

[nazztman4739]

ok my set up is pretty much stock has fast 92 3800 vigilati stall 3.90 9 inch rear cold air intake.

the car after some work idles fine throttle response is great.

problem im having first is its shifting is a lil strange long shifts from 2nd to 3rd once in 3rd shifts in 4th sometimes has to manually pull down to feel more power.

2nd is the car drives fine i do get a bank 1 and 2 lean code no spark knock or noise but around 2500 to 3500 under driving load the car falls on its face, i cant really tell if its something transmission or engine issue maybe where the lean is coming from.

[joecar]

Post tune file.

Post some log files.

What year/model/vehicle...?

[nazztman4739]

2000 camaro ls1 i dont have log files for some reason i cant data log havent been able to since i bought efi live working on that to heres my tune sorry im a beginner

[nazztman4739]

and curious would the 285 kw tune benefit me ?? and does anyone have it to share

[joecar]

When does it prolong 2ng gear...? Do you have a log of this...?

After you install the 3.90 rear axle, you entered the new ratio in H0103 in the tune... and did you apply the shift point correction...?

[nazztman4739]

When does it prolong 2ng gear...? Do you have a log of this...?

After you install the 3.90 rear axle, you entered the new ratio in H0103 in the tune... and did you apply the shift point correction...?

I did change ratio but
I did not change the shift point correction I'm very new to tuning but before the rear swap it didn't act right either

[nazztman4739]

I'm not real sure how to change the shift point correction

[nazztman4739]

It prolongs during light and hard acceleration

[Supercharged111]

I'm not real sure how to change the shift point correction

EFILive will ask, when you change your tire size or speedo correction factor, if you would like to skew your shift points. I imagine it does the same for gearing. So you could set it back to stock, say no to shift changes, then change it back to 3.90 and say yes to shift changes.

[joecar]

Yes, when looking at the Speedo Calculator you will see a tab called Shift Point Correction.

[nazztman4739]

here is the data log please help arggh it actually kinda feels like the lockup hope this helps

[joecar]

Log these pids VSS, RPM, TP, GEAR, TCCMODE, TCCSLIP, TCCDC, SHIFTLAST, TFMPRS, TFT, MFTOTAL.

[nazztman4739]

i added the ones you asked for hope that works

[joecar]

That log has too many pid channels (46), it's recording one frame every 1.5 seconds, that's too slow, its missing events that we're interested in...

remove all the pids other than the ones I mentioned (check that the pid channel count at the bottom of the PIDs or Data tabs shows 24 or less)... this will record one frame each 0.2 seconds.

[joecar]

Drive the vehicle on a straight road at 45 mph with steady throttle, and take a new log during this.

[joecar]

From your log, note the following:
a. your MAF appears to be under-reporting.
b. commanded TFMPRS "torque signal pressure" is too low (possibly due to a.).
c. vehicle appears to be running at light load, but TFT is getting too hot 225*F.
d. your LTFT's are pegging at 25%, you might have an airleak (at exhaust header/collector, or at intake manifold).