Hello,

I've been lurking on these board for a while now and finally decided on the Cobalt SS S/C.
The couple questions I have are ones that I couldn't find anywhere on the board, so any help you can give would be greatly appreciated! Keep in mind my SS is 100% stock.

1. My car under light acceleration seems to surge, almost as if it has a miss. Does anyone else have/had this condition and what did you do to correct it?

2. At what mileage have you whom have done a GMPP Stage 2 been having them installed? Does GMPP have a recommended minimum mileage for the install?

Thank you for the help in advance!

 

My car has done this sense I got it also and most people dont know what I am talking about, when I try to explain it. But I has gotten alot worse with the added power of the stage 3 kit from INTENSE. I still have not found a way to correct it yet. And as for the stage 2 kit I am not sure, I installed my stage 3 kit at 8,400 miles.

 

i also have noticed the surging under accelerations espically @ low speeds! my fix was to down shift and it seems to be fine, my guess is the weight of the car in requires a littel more effort. i dunno i only have 500miles if it's still like that w/ 3k i am taking it to the dealer!

 

What do you guys mean by surge? I think I can help if it's what I think you guys are talking about.

 

Could the "Surging" just be the blower coming on strong, around 4000rpm is when you can kinda feel it hit...

 

When my car was bone stock I had the same "miss" at about 3000 RPM. I tightened the plug gap to .035" but it was still there. Ask your dealer for the newest PCM flash available, maybe that will solve it.



CTCOBALTSSS, it is like a little hesitation, or a miss and only happens once, like if someone tapped the brake for a split second. Exactly the way a ignition misfire is the best way I can describe it. My car was brand new when it was going on. It also didn't happen every time

 

It wouldn't happen for me when I gave it WOT, only under normal driving. Was driving me nuts.

 

Oh I see what you guys are talking about. Here's the deal. Superchargers also have a little lag, not as much as turbos but there is some. If you are in the low rpm range like 3,000rpm and you punch it. Surging is going to happen. These Eaton M62 superchargers send bursts of compressed air into the motor, not a steady stream. The higher in the rpm range you are when you punch it the better. Pressure has to built up, hense PSI! Just be smoother with your acceleration not so mashing the pedal. It's cool. Everyones SS/SC is this way.

 

Oh ya I had stage 2 put in with about 2000 KM's on it.

 

what kinda gas you guys using? I got something similar the one time I used 87 octane back when I bought the car last year. Ever since I have used top tier 91 stations only and have yet to get that same issue ever again.

 

Only Chevron 92 has been in my car.

 

While I understand what you are saying, when mine is giving me this off boost feeling, my acceleration is very light and even. Not hammering on it at all. There's under 500 miles on it. It feels like a miss, and it does it in the lower gears exclusively. Mine doesn't only do it just once either, it's like mutiple misses all in a row until I give it more gas and build up boost. It's like it either wants to be either super slowly accelerated or very hard, but nothing in between.

I'm confused.

 

Maybe it is a drive-by wire issue that you have going on?

 

You know what this might be it.
Do you drive with the temperature( Hot Cold ) controlls all the way over to the left on cold?
I used to notice when I drive like that I get kind of the same surging issue. The A/C is not on but the controll is all the way over to cold. Try putting it over in the red and see what happens. I swear it something to do with that. Notice how air comes through the vents cool with the A/C off. This could be interesting. Ever since I noticed this I keep the dial a little in the red and haven't experienced surging since. Interesting hah?

 

It was all the way over the cold side with the A/C off.

Even if this works though, how could this be linked with a hesitation, surge, miss, whatever it is?

I'll have to give it a try non-the-less!

 

See that's what I thought, I new I wasn't going crazy. Trust me bro ever since I started keeping it at least a little in the red the surging has gone away. It has something to do with the A/C catching here and there. When the dial is all the way over to cold side, cool air comes out of the vents. That would be impossible if the A/C was completely off. By putting the dial all the way to cold, even if the A/C is off, the A/C must be slightly on in some way. When you run A/C it takes power away because it runs off the motor. That explains the surging. This is starting to make some sense.

 

Just tried it. Still hesitates.

When I thought about what you said though, the A/C will not come on unless you press the A/C button on the HVAC. That is the only control for turning on or allowing the A/C compressor to turn on.

I suppose I'll have to hook up a Tech II to it and see if she flashes any codes.

 

I have the same issue, its hard to explain but if the car were on the dyno yhou'd see lots of spikes...thats the only way i can explain it.

 

My car has the same issue its pissin me off also! I have yet to look into as the car only has 900 miles on it. Ill check the service bulllitens at work tomorrow to see if theres anything out there on it.

My explination is also a miss feeling.

Kyle

 

My "surges" came when I put my stage 2 on at 11k kms. I changed my plugs, and cleaned my filter and tightented all my intake bolts and cleaned the interior. Voila gone.

btw I also keep my dial all to the left on cold with the AC off. I shall play with that new info.

 

no no no. it is just bringing air through the vents and not allowing heat from the engine to pass through.

i dont mean to discredit you, u are def helping out, but the A/C cannot come on without that button being pressed. i would question your gas if u are having surging. if you dont solve it soon, bring the car back to your dealer and replicate the surge with them in the car.

and im going to stand very firmly against the A/C coming on slightly until proven otherwise :P

 

Let us know what you find out!

 

Did you ever find anything out on this condition? Mine still hesitates even after my stage 2 install (which is very nice btw).

There must be other people who have this hesitation!?

 

i think i know what you are talking about. i have felt a light surge in lower rpms and gears. i havent investigated it or talked to a dealer cause i cant pinpoint exactly when it does it, and what conditions are involved. i will play with the temp gauge to see if that helps.

mine has done this since i got it and i have about 7500 miles on it.

 

now im curious to see if my car does it too, i havent felt anything different at all my car has run pretty dam good since i got it last week, is your car an 06 or an 07? mine is an 07 maybe it was something that was fixed for 07??