CTS-V Throttle transition

[SilverVBullet]

Hi all! I had my car tuned and I am having an issue with throttle response. When I first hit the gas the car falls/stumbles then goes. I been trying to work with the tuner to get it situated, but he dont have time after he has been paid of course. Some times when I am backing out of the driveway the car stalls. But that might be a different issue that I am hoping I ironed out today. But even when the car is in park and i hit the gas aggressively it stumbles first the same. Someone please give me some advise on what direction to go. Its a 2010 Ctsv on the stock blower with 1300cc injectors and a pulley.

[GHuggins]

Pulley and injectors only? What brand of injectors and what pulley size? Shouldn't have any issues with these unless the tuner didn't tune in the ve or a cheap brand of injector was used

[Klumsy]

zero out the tps % on PE

[GHuggins]

zero out the tps % on PE

???

[SilverVBullet]

Pulley and injectors only? What brand of injectors and what pulley size? Shouldn't have any issues with these unless the tuner didn't tune in the ve or a cheap brand of injector was used

1300 FIC's, 2.4 Pulley E85 75% and cooling mods.

zero out the tps % on PE

Explain.

[PST]

Disregard Klumsy, without actual tune info to go off of, that's bad advice. Do you have hptuners, or the ability to use it so you can post your tune?

Without a tune file and a proper datalog, all of us are just shooting in the dark with guesses.

So my wild ass guess is that your tooner butchered the tune because he didn't know what the hell he was doing. And he's now hard to get ahold of because he doesn't have a clue how to fix your issue.
Time to find an actual calibrator that will take the time to build you a custom tune.

[07GTS]

i had a similar issue when i changed to e85 and return fuel system and big injectors had to re do the VE soon as u stomp it it hesitates then revs up but soon as i dialed in the VE again it cleared that right up