I have read through the first 5 pages of this thread, and since I am a few days away from tossing a down payment on a new turbo 08 SS, i was getting a little worried, but I know how internet forums are, so I wasn't freaking out to much.

Just my 2 cents from a collective, outside point-of-view. It seems that the same people who were having these "power losses" via boost via SS's turbo came onto this thread to freak out before they even had their car reasonably "broken" in.

What I am say is, computers (ECUs) do take time to learn driving ....Habbits ( not word I was looking for but yall get what I mean)

If you have 150 miles on your Cobalt SS/TC and your noticing funky power bands through any gears like the ones described in this thread, just keep driving until your at atleast 500 miles. Most cars are broken in by then.

But yeah, I noticed that a lot of the original posters that complained about these odd power losses updated us all claiming the problem to be magically solved now that they have 700 miles or whatevs on their engine/car.

P.S. I am not a mechanic or that knowledgeable about engines and ****, but yeah.. basically what I said above *Bong Rips for Jesus*

 

I just bought a silver SS/TC 3 days ago, and I am having the same problem. I didnt want to get on it because it's new, but when I did, there is a surg of torque till about 3,000 then it falls flat. The turbo is spooled, but it's as if it's breathing through a straw. Then at 4,500 rpm it starts to pull again. It's F$%#ing annoying. My boost doesn't drop below 15psi the whole time, yet it does this. If anyone has found out what the deal is please post. I'm going to look into it, just not through the dealer.

Wow I feel like a dumb-@ss, maby I should read bfore I post?

 

Keep throttling boys and girls. Let your turbo work. I haven't had a single reoccurrence of the problem.

 

Bringing this back from the dead. My car has had this loss of power problem before. I read the entire thread, disconnected my battery and the problem went away. That was at around 500 miles. I'm now at 900 and it's having the same problem again. Anyone have any new news on whats going on here? I'm not going to disconnect the battery this time just ride it out and see if it goes away before I take it to the dealer. My dealer will not listen to a word I say when i comes to his car. They look at me like I'm stupid when I graduated from the same automotive courses as most of their techs have lol.

 

i had a few days of intermittent lost power when it was 80 degrees out, but nothing with cooler ambient temps. Ive got 4k miles and 2nd gear WOT= wheelspin sub 40 degrees

 

Well it doesn't seem to be temperature related. You give it WOT at low rpms in 2nd the car starts to take off, builds full boost but falls on its face untill about 4k then it picks up again. The first time it happened I thought boost leak but it stays at a consistant 14-15psi. When I reset the computer the problem went away immediatly so it seems computer related. Definatley not wheel spin. It's just how the OP decribed his problem.

 

makes 2 of us

 

I had the same problem right after I got mine. From what I read in the manual it may have to do with how the computer learns during the break in period. Pretty much the same day it happened I went camping so I was able to get some highway miles and by the time I got back it seemed to have cleared itself up. Forgive me for not doing the conversion but that was at about 300kms on the car and I now have 12,000kms on her with no problems. Give that a shot and see what happens.

 

My car did that same strange thing a few times during the first 1000 miles or so, but it went away. If your problem does not go away take it to the dealer. If they cannot replicate your problem with the car they will not be able to do anything about it. It is probably a computer calibration quirk. Your car may be knocking at that RPM though, that would explain the loss of power and boost. My car had 3-4 degrees of knock between 3,000-4,000 RPM that was seen consistantly, after tuning and commanding the computer to go into PE earlier the problem went away.

 

Thanks everyone I guess I'll just continue to wait it out. It's just so weird, it has plenty of power then on the next start up this happens. I only have 900 miles so I hope that's the problem as others have stated. I was just curiouse to see if anyone had a definate answer because a lot of owners have been experiencing this problem.

 

I had the problem on an on ramp merging onto the interstate on the way to texas. Coincidentally it was right after I filled up at a gas station. (One that uses the techron additive.) It got so bad my car threw a Missfile CEL,(CYL one) and a Fuel issue call. I stayed easy on it, and burnt through the tank of gas and refueled again. The problem went away, and I cleared the CELs with my reader.

My theory is bad gas. I always 93, and this place I stopped at, was the one Ethanol Free mixture I have come by in a long time. My SAAB 9-3 did the same thing too (EcoPower 2.0T engine) with cheap gas or a big change in the mixture. These frigging gm computers have to relearn how the gas burns apparently, and the fuel tables have to be adjusted. (Or relearned)