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oh one other thing, bump up your base timing at idle as well. That will help your idle vacuum. I'm running about 20 deg at idle. Be sure to adjust the idle and main spark tables so you don't get a...

With regards to idle tuning you need to adjust the IDLE ADAPTIVE SPARK CONTROL parameters. With a cam you will have a bit of idle speed movement and the stock parameters over react and cause huge...

What did you do to fix it?

So is there a timer in the tune, or is it a mechanical issue. I was think that maybe it could be a low fluid issue, but I'm not sure. So I was thinking, if I hot lap the car, turn it off and start...

Good news, I solved the problem. Bad news, it had nothing to do with my changes.

The answer... hot lapping. After being thoroughly pissed off because the car was still having issues, I had a...

copied over your RAF min table and lowered my idle to 650 RPM. We'll see how that works. I think I just need to get the converter in the car, but hopefully this helps it out a bit. Thanks

Off...

That 3-1 stop is a pain. With it stock, it drags the motor down and then recovers right before the stop. When I lowered the shift point it comes to a stop with a lot more load on the brakes and...

bluegoat06, how did the shifts feel to you with that setting, part and at WOT? The zero values are for the min pressure.

Make sure you grab all the values. The shift initial/final transition %...

I'm on a roll, lol. Here is my latest file. PCS2 still did the same thing, but no lag. I upped all the oncoming volume presets. Excellent, excellent... plus a better part throttle shift. I then...

Did these runs shift fine into 4th? Reason I just ran the car on the street and I had the 3-4 hang up. About a tenth of a second prior to the actual shift PCS2 went to 0 psi. On your logs PCS2...

I am pretty sure the PCS values are based off the oncomming and offgoing lookup tables along with any learn the TCM has done. It would be nice to know exactly what the y-axis 0 1 2 means though.
...

bluegoat06,

check out your stock tune log vs your current log. Pay attention to PCS1 and PCS 2. I think this is what we need to look at.

For 2-3 at the shift
Your stock Tune
PCS 1 - 48.9...

carneb, That's the problem it's not the shift time it's the delay from the commanded shift to actual shift. That throws in a huge error opportunity that will affect the shift point based on a given...

sure did. I actually used the auto calc for everything initially too, but I re-did it manually. For some reason it would change the tire revs per dist.

When I ran at the track on Wed, I used...

Alright I took it out for a drive.
Here's how I have the shift points set now.
1-2 21.6mph 4450rpm
2-3 46.1mph 5200rpm
3-4 75.0mph 5650rpm

Here's what it did on two different runs. First was a...

Yours was a bit shorter. If you look at the log. You will see trans current gear change well before your actual shift point. This is based on the MPH in the tune. The actual shift can be...

One other thought. Based on what I'm seeing, it would be safe to say that the quicker the car goes through the gear the further off the shift RPM will be. This reminds me of a similar issue with...

Bluegoat06 thanks.

Well there seems to be a little shorter elapsed time between commanded shift and actual on you setup. But one thing is for sure, it is by design in the factory tune as well. ...

here is the config file. It's a bit of a mess but gets all the data.

I tried driving around with the CTS-V program and I did not like the shift feel at all, part or full throttle. 1-2 and 2-3...

well here's my plan for now... I can't really go back to stock, because the gears throw that all off, but what I'm doing now is loading in all the CTS-V parameters and then scaling all the shift...

the shift points at part throttle aren't so bad. The shift feel went to crap though. Not sure why yet.

So I am looking at the GXP and C6 files and notice that their Pattern A Full throttle table...

well the more I think about it the more inclined I am to just return everything to stock and just adjust the mph for the gears and start from there. I don't know yet. I'm really not happy with how...

04blackgmc, I just looked at your logs. Here is something that I'm wondering may be missing in our parameters.

Yours is the same as mine when my car shift like yours. From the time 4th gear is...

Well I just put in my 3.70 gears and took it to the track today. 3-4 is a bear to dial in. It feels like someone is putting their foot on the brake for a sec before it shift. I did have it shift...

Zero out the enable and delay RPM on the PE enable. Looking at the datalog, it doesn't look to go into PE mode until you pass 3000 rpm which would correspond to the Delay RPM in your tune.