i have this problem from a start in first gear, when i gun it, it seems to just sit there (VDC off) for a second, then start to accelerate, and i dont think my tires were spinning, it just seems to hesitate. maybe im starting at an high enough of an RPM? i started about 2.5k

 

I didnt think it would make such a big deal, but I think it was the intake that caused the MAF to go bad.

 

I was hoping to bump this and see if anyone had come up with any solutions to this hesitation. I see no one has posted for a while.

 

since you have an '07, the hesitation was fixed if you did a reflash of your system with the '08 specs. Do the reflash and it should go away. Mine did

 

perfect. is this something the dealer can do, or do i go aftermarket?

 

I went to the dealers regarding this and this mentioned the re-flash is only for the automatics, no fixes for us 6mt folks, as they told me this is a normal characteristics of this car, including the flywheel chatter problem 6mt's have been experiencing =(

 

Mine was fixed with the cruise control recall. I haven't notice that jittering in a while. The cruise control itself is still kinda crappy. I'm in a rental Pontiac G6 right now and it's cruise is like a rock when you set it. My G still floats around when I go up and down hills mainly.

 

Is it the same reflash that was supposed to fix the overagressive throttle tip-in? I had that one done and the tip-in was gone but the hesitation described in this thread is still there. I previously assumed it had to do with the ECU "learning" from my driving style Hesitation is annoying since I am often caught in stop-n-go and can't rely on the car responding quickly enough to give me that instant burst of speed to chage into a faster lane.

 

I noticed similiar lag in my 08 auto. If I drive in normal auto mode and floor it there is a big, noticeable delay and then whooosh. ALL THE POWER AT ONCE. It kind of annoys me too. Even in manual mode I'll downshift and apply throttle and get a delay...car rocks into 2nd...and then goes. I hate it. Overall I like the car but it do have my share of pet peeves.

 

Yeah, Me too. Just as described here. Has that slight hesitation under those circumstances. I've had the TSBs applied - issued April 29, 2009 forgot the #, but it was for slight rough idle at Cold Engine start up (no matter what the outside temp) and slight hesitation. Helped just a very little. My ECU was replaced by my Dealer when on a service appointment, a Service Advisor on an unauthorized basis applied a 08- version of TSB ECU upgrade that sppiled EVERYTHING. The car totally changed. The Service Manager agreed with a test drive, and replaced the ECU with a new Un-Upgraded one. It's better than after the erroneous upgrade was done, BUT it still not the same as my original.

 

I have the same problem with my 06 X..

From my point of view, it seems like the knock sensor is backing the ignition timing.. thus loosing power for a second, and gradualy putting it back to full power... Well this is how I see it...

I run 91 octane fuel and some people run 93 but still have the same problem...

I wonder if this "sprint booster" kind of module could eliminate this problem ??

 

^ i think it would, all that unit does is to make the car think that the accelerator is pressed more than you are actually pressing thus it "feels" like its quicker and responding faster,just keep in mind that you will have no gains in power but should "feel" quicker and thus less hesitation.

 

I told the dealer the exact TSB and after they applied, all hesiataion went away. im so much happier! The TBS i had them apply was the one for the cruise control 'surging' while on a decline, but i don't remember the number.