Hey Mike, I have experienced this on occassion when on the interstate. I almost think its like a wake up call. the first time you do it, its like the car is saying WTF? then step on it again, and its there... your right this only happens at speed with a progressive pedal. It to me acts like an on/off switch if that makes sense. try it..

 

Thanks Christien
.that at least gives me some hope.
The part that still does not make sense to me is after I got off the highway
And took off in L (1st) and put it to the floor it only boosted 12 psi
Same thing when in d this morning.
Have you ever experienced that? That Was a first for me.

 

Maybe torque reduction, via torque management controls, combined with abuse control tables, taking control ? Plus there's turbo overspeed controls. Lots of 'nanny' controls. There's a lot of interaction, between a lot of different scenarios, that are always changing. Air & water temp, torque requested, trans & engine temp, ect, ect, all with protection control , as priority.

With HPTuners, I zeroed out as many of these protection/'nanny' controls, as HPTuners heve uncovered. But I'm sure that there are many more left, that HPTuners haven't discovered.

Even so, with HPTuners, I have to 'wake-up' the ECM, before doing some all out 'testing'. Just a 'kick-down', or two will 'wake-up' the ECM, for me.
Just kind of like the opposite, to the so called 'learn-down' scenario, where when your overshooting torque load targets, the ECM quickly brings it back into control. I'm thinking that there must be some kind of 'forward-thinking', or 'learn-up' controls in the ECM. Maybe the ECM is constantly 'averaging', how you drive, & is constantly changing/setting, tables, for the way that you drive.
With a lot of the 'controls' turned off, via HPTuners, I'm thinkng that the 'learning', is way faster, & easier, to get into the 'fun' mode.

And always, at the track, my 1st run of the day, is my slowest run of the day. It could be to, that I'm putting 'heat' into everything, don't know ?

Now with that in mind.
I'm thinking that the , 'Drive-it-like-you-stole-it', mode, might be the best way, to always have the ECM, in the right 'frame' of mind, er, 'learning-ahead' mode.

 

Hmmm, you know how I feel about L (low).
DON'T DO IT

Per the owners manual:
L (low) You can use it on steep hills, or in deep snow, or mud.

When the ECM 'Sees' that you have put the shifter in 'L' (low), the ECM is
thinking, OH ****, THIS GUYS IN TROUBLE, & NEEDS MY HELP. The ECM is
going to throw ALL the 'protection' controls, torque controls, & 'abuse' controls,
into 'play' to 'save' you.

The # of times that I have used 'L' (low), in 3 years, uh, ZERO...

 

Low in my manual states 30% torque and power reduction.

So there may be some validity to my theory on waking up the ecm?

 

Yes....

The ECM needs 'foreplay', to preform best...

 

Now that is funny, Son.

It is interesting to stomp on it and see which car we are driving today.

 

You guys are killing me LOL
Well someone must have been saying prayers for me or the SS Speed Gods where looking down on me.
I took it out for my lunch break and it ROCKS.
If anything it is boosting and pulling harder than before if that is possible
When i got on the highway in D by the way
it pulled like a 12-13 second ride.I know it wont run that in the quarter but all i can say is WOW

Maybe my car was just having a bad day this morning I went from this

to this

Thanks for letting me vent and letting me know that its just those computers throwing me off.
I really do think I would loose my sanity with this car if it was not for the great support from you guys on this site.
thanks again

 

What bigjacksauto is describing seems a little inconsistent. (now that I see his post, perhaps he is fine) The other stuff seems to be automatic peculiar. One of the biggest challenges I've noticed with tuning the auto is the tendancy to fall in odd places on the load/torque tables relative to pedal position, gear, and rpm. The manual does not exhibit this, I think, because the boost drops when you push in the clutch and shift. I think it has something to do with the order of events. If you drop it in 'I' to get 3rd, it seems to put it at the correct rpm and load on the tables before you hammer it rather than entering at the top of the load table at a low rpm. I've tried to mitigate this by making sure the airload does not get ahead of the rpms so the computer is always dialing it up instead of back. The GMTU seems to bring a lot of air in earlier which might have it splitting the difference between using timing advance or increasing airload to meet torque targets on a downshift. I don't think I've explained this very well, but I just woke up.

 

It shouldn't be more than 1.5-2 hrs. The bigger issue is the dealer having to wait for the download from GM Corporate. Because these are tied to the VIN numbers, the re-program comes directly from GM Corp to the dealer. The guys I had doing it had to wait a few hours because they weren't able to get the download. Not sure if it was a manual person process, or just heavy network traffic.