I brought up my error codes with my scan gauge. They were stored and must have cleared after successful cycles.

P0300 Engine Misfire Detected -PCM
P0326 Knock Sensor (KS) Performance -PCM
P0171 Fuel Trim System Lean -PCM

I got my intense package on a few weeks ago and had them tune it. It was a little rough. I put in new plugs all at .035. I did them after the tune to smooth some minor issues.

Right now, I'm stalling a lot in reverse and first. I will give it a little gas to move up or back out. I put the clutch in and the rmps jump to 1600 with the clutch down and then fall to 400 and it stalls. I know how to drive a stick so it isn't me stalling it. The clutch is in a full 2-3 seconds and it stalls while it is down.

Anyway, I'm waiting on intense to respond again. They are great service wise so far in the respect of listening and getting back. Hopefully, problem solving will turn out the same in the end. I'll keep posted on what resolution was needed and what I find out was wrong.

Final Update: Incase you don't scroll down.
I got my dual pass installed. Didn't mount the HE yet, since I just wanted to get it running for now. One of my injectors was not seated properly, I resealed everything on the supercharger, I already had my plugs gapped to 035 instead of 040. With those three things it now runs good. AF is around 14 instead of 17, no high pitched noise, runs smoother, better mpg. I do believe all were playing a factor.

 

Well, I noticed a lot of people are getting the idle issue. I don’t think it directly has to do with the tune, but why would the changes and/or tune make it worse?

I figured out that the misfire must have been caused by the Autolites as my new plugs haven’t brought up any codes. Except p0171 keeps triggering and clearing from time to time.

The rough idle and stall issue is still there. I did get a hold of intense and they offered to attempt to correct it if I could get some readings and send them my PCM. They are very nice to offer that, but I still believe the issue might be elsewhere.

I’m going to check for vacuum leaks. Anyone have any suggestions that will make it easier or quicker? I have a feeling that will be a long process. I also am going to play with the gap a little on the plugs and see if I can’t get it a little more stable. Will also try to battery reset when I finish and see if it relearns a little better.

Really makes me wish now I didn't sell my hptuners so I could scan and log. Will have to see if I can't figure out how to get the aeroforce to log. I haven't tried that function yet, but guessing it won't be near as helpful.

 

You are running the highest octane you can get right !
And watch where you by your gas.

 

Yeah, I never run under 93 octane. I just pulled another P0300 this afternoon. I still haven't had time to work on the car or check anything out. I pulled the battery to reset things it helped a little at first it seemed like. Now it seems to be relearning the wrong stuff again??

 

Let me know how it goes, I have the same idle problem but mine happens when im running my car also. When Im coming to a stop my rpms fluctuate then it will turn off. My problem started after I installed my stage 2 and got it tuned with hp tuners the first time. It wasnt that bad before, just the rpms fluctuating but after I installed the headers and d/p its started shutting down. If you find anything let me know since I havent been able to figure it out.

 

Intense Tunes Sucks....do U Know Just How Many Motors They Have Blown..find Someone With Hp Tuners To Tweek Your Tune...for Now I Would Make Sure U Dont Go Wot!!!!!

 

Do you know any shops in LA, SFV, Orange or San Diego that can tune the cobalt?

 

To me it sounds like you have an air leak somewhere. The p0171 is for a lean condition due to to much are entering the intake unmetered or not enough fuel. Maybe an injector seal leaking at the manifold, or the supercharger gasket. So you can check it with some brake cleaner to see if the idle gos up when you spray the manifold area. thats how you can find your air leak. or you can just be able to hear it but it will be a very light hiss.

But thats just what it sounds like to me seeing you have the supercharger spacer and all.

 

Yeah, I plan on checking it well. It sucks. I have been working so much that I haven't had time to update this thread. I haven't had a day mess with the car. I am getting almost a high pitched noise when driving that isn't the supercharger. I think it might be from a leak. I keep throwing the p0300 too, but it could well be from the a/f being off from a leak.

 

yeah

 

As promised here it the update. I got my dual pass installed. Didn't mount the HE yet, since I just wanted to get it running for now. One of my injectors was not seated properly, I resealed everything on the supercharger, I already had my plugs gapped to 035 instead of 040. With those three things it now runs good. AF is around 14 instead of 17, no high pitched noise, runs smoother, better mpg. I do believe all three were playing a factor.

 

Well My Idle problem seems to be solved at least for now. I took it to the dealer yesterday to get checked they told me these cars get a lot of carbon build up, so they cleaned out the throttle body, injectors, combustion chambers and replaced the fuel filter and it seems to be running right. I got it back yest and cel went on before i left the dealer so i took it back today for urther cleaning and car is running good with no cell. Ill see what happens when i put the cai headers and d/p back on.

 

Well, I thought that was my last update. It was all running fine. I drive it around 200-300 miles with no issues. The A/F was sticking right where it should 13-15. No idle issues, really smooth running and shifting too. Now it got a little rough. I pull in my garage for the night and let it idle a second. It is back to spikes of 17 while at idle and a high pitched noise again. I am going to recheck that something didn't come loose. Maybe it just got oiled up again inside. I'm hoping I just got a loose spot somewhere on the air intake or TB. It gets annoying.

 

try swapping your cai back to stock for a day or so and reset your bcm.

I datastreamed a friend's stage 2 balt with a cai and without. With it he was getting several random misfires as well as some rich/lean spikes. I figure the maf doesn't like the way the cai changes the airflow characteristics in the intake.