-Only noticed it in 2nd and 3rd gear.
-Moderate accelleration speed.
-Bucks like I'm hitting RPM limiter around 4 to 5Krpm.
-Can't reproduce it, seems to only do it randomly and when engine is cold.
-Did it real bad last night and got a CEL.

Any ideas? If you guys need more info let me know, I just figured I'd use descriptive sentences and save you boring story of the event.

Possible Problems?:
I've read about people having problems with their cobalt and misfiring cylinders, what does that feel like and could this be it?

I have an AEM intake and I think it only happens on damp days (rainy or wet roads), could I be taking in water?

We've reached the freezing season in PA, our temps don't get above 35 degrees anymore, any problems related to the temp?

 

I had this happen before and it was from my filter being damp (I cleaned it and it wasn't 100% dry). You end up pulling the water out of it and it gets the MAF wet and it runs like ****. When I put my k&n intake on I notice the splash guard does not touch up agaisnt the frame like it should, atleast mine doesn't, and water was getting in as well. I put a **** load of electrical tape over the area where water was getting in. I would take out your filter and see if it is damp. If so that is your problem, your MAF is getting wet. If that is the case, try to find out how it got wet.

 

God I hope it's that simple (for lack of a better word), thanks, I'll definitely check that.

Anybody else have any ideas or input, any other possible reasons for this?

 

i had the same problem and my aem dryflow was soaked, at about 3.5-4 rpm it feels like its blown... but if you shift under that, it feels fine

 

yep. now, the important issue. how damaging is this to my engine and what can i do about it?

 

i took the filter off ran it through running water, then let dry and reinstalled... then cleaned my maf sensor with electronic cleaner, inportant no to touch with anything other than that... everything turned out fine. also look into covering the hole in the fender well

 

clean the MAF even if there's no water on it?

 

damp filter caused this once or twice in the past for me.

get yourself a hydroshield, and clean your maf sensor.

 

who sells this and how much airflow does it restrict?

EDIT*: i found out they TurboTechRacing sells them for Injen intakes, will this work on my AEM or is the cone a different size?

 

if its really that cold jus put your stock intake back on.. and if problem persist's that tell's you it could be a bad MAF.. if not you jus solved your own problem.. i had it and the dealer said it was my intake.. so i took it off. still didnt fix the problem niether did a MAF or injector seals. for all we know it oculd be a fried PCM.. cause that's the only thing the dealer didnt check. they tried everything else and for over a month my car was at the dealer..

 

negligable

You can usually buy them anywhere you can buy K&N or Injen intakes.

http://www.turbotechracing.com/produ...idproduct=4863

 

will it fit my AEM or is the cone a different size, I would think they would make it adjustable and approximate.

 

im having the same prob right now but im in arizona and theres no water,it hasnt rained since before i put on my CAI. and im now officialy lost... i guess ill clean it? maybe scan the codes

 

I used to have the problem when I lived in phoenix as well. Turns out the dust gets in the filter and restricts alot of airflow. Try taking out the filter and blowing it out with some compressed air. Worked for me.

 

It is probably obvious but like I have said many times, the stock GM intake for this 2.2 liter 10.1:1 compression motor is designed optimally for how much air it needs.

It is borderline to run 87 octane just on the stock intake, and they restricted it just enough to deal with colder weather.

You add a CAI and it does blow in a lot more cold air, now the engine throws a lean code.
It is not always going to do so, but it depends on how cold it is, and how much you romp on the throttle to get too much cold air to mix with 87 octane gas in a 10.1:1 compression environment.

It is colder outside and you should try running some 89 or 91 octane.
Or if it is a two peice CAI, convert to SRI for the winter time.

The MAF on my wife's Sunfire got damaged from me washing the motor down (when it was cold), and it felt like it had a shifting problem. The sensor needing swapped and it runs fine now.

As for damage, the Ecotec is a very tough motor, just do not keep it driving in this condition until you find out what is wrong first. I read the Ecotec 2.2 had a torture test done to it of 1000 flushes of cold water through the motor at running temp and the block held. It is like a Honda motor but it actually has some *****.

 

running a higher octane doesn't change the amount of fuel entering the combustion chamber.

I doubt the maf sensor is that sensitive to colder air. This problem pops up year-round according to the posts here. So I doubt it's really the cold weather. Besides, your pcm will make adjustments for air temp changes.

I still think it's a product of poorly designed intakes. But I could be wrong.

 

go in your trunk where the spare tire is feel around and there will be a big red fuse unplug it
pop your hood unplug the maf sensor
plug it back in(maf sensor)
plug the fuse back in
start your car

let me know if it works

 

so you want him to unhook his battery? Unplugging the maf sensor and plugging it back in won't do anything.

 

yea the red fuse in the truck is unhooking the battery just the easiest way

 

yea but the filter is only 3 days old! ivehad this problem since i installed it

 

I would check and make sure you have all the flash updates. There's a tsb for some cobalts for hard shifting and bucking.

Whatever you do don't go to Sand's Chevrolet. Those people are complete idiots and really don't have a clue what they're doing.