Just installed this Hahn CoolRam intake and it seems like I am having some kind of back pressure problems when I let off of the throttle.

I have had GMS1 and 3" Catless Downpipe for about a year with no issues, but 3 days after installing the Intake I had an instance where my boost would only go up to 5 psi. After i restarted the car everything was fine.

Here is a video of the back pressure sound I am getting. You can hear it when i only left off of the throttle a little.


Thanks for any advice.

 

Weird ass sound. You sure the intake coupler isn't collapsing?

Hahn was known to have issues on this car.

 

i have no advice but i think it is a somewhat common problem...

welcome to the forum, i'm sure someone with experience will chime in!

also be sure to google 'cobaltss______" for good results

 

that is weird, mine has never sounded like that. It almost sounds like the coupler is collapsing as stated before.

 

Yesterday I had to occasions where my boost was limited to 5 psi. I didn't get any lights on my dash indicating a code was thrown. After restarting the car everything was fine. I do have the GMS1 tune. I am starting to wonder if this tune can't handle the amount of air intake i am getting. Does anyone have the GMS1 and the Hahn CAI? going to either readjust the piping and make sure everything is installed properly or just go back to stock intake with K&N drop in.

My friend did the airbox mod and has the GMS1 tune and had the same issues. Limp mode. He had to put the stock tune back on his car.

This is frustrating. Hahn said that the fuel trims wouldn't cause problems. Is there a known issue with the GMS1 and CAI being installed?

 

I had Hahn on my car before I was tuned, and I would frequently get the 5 psi errror. I had to unplug the battery for it to go away. once I got tuned it was fine.

Intakes on the SS/TC are finicky and almost, if not all, of them require an aftermarket tune to skew the MAF out for the amount of air.

 

I drive 35 miles, mainly interstate to work every day. Would it be fuel efficient if I run a tune even for highway/daily driving. I know the Trifecta tune has the option to run stock or hit performance button for aftermarket to kick in. I would have to run aftermarket tune all the time so that I don't have issues.

I don't want to tune before I know that is the issue so i will probably put the stock intake back on for a while to make sure.

 

I'm not sure if you can test the collapse theory. With the car running you could try sqeezing the coupler and see if it collapses and makes the same noise. I don't think revving in neutral would do it.

I wouldn't really get a tune till you figure this out.

 

Yes you can get a tune for your intake and nothing else. Trifecta is a canned tune and if you want to just fix your trims I'd recommend finding someone with HPT and get one of the reliable tuners on here to fix your trims.

Once my car was tuned it was like night and day.

 

Found this in a thread

"Also according to PrincessTurbo that coupler supplied is very flimsy and collapses and kinks very easily. He ended up replacing it with a Vibrant reinforced elbow which solved the issue but cost him another $70. "

 

i hear that same whistling sound too with my Hahn CAI. I bought it used and it already had it on there. but i do not have a GMS1 tune like you. I figured it was normal because the turbo wants to build pressure when you push the accelerator but if your just trying to maintain a certain speed there is no need for the boost pressure. I thought it was just releasing that pressure and just so happened to whistle a little while it happened. A friend of mine said it seemed normal. But seeing all you guys say it's not makes me think otherwise. Sorry i can't be of any help, but you're not the only one having this happen

 

My friend has the 2008 SS and he has the airbox mod and he said that he has the same sound. Its the BPV releasing pressure from the turbo. You can just hear it easier after the intake mod. I just hope that I don't get any more 5 psi mode issues. Happened to me two times last Wednesday, but not issues since. Car is running like a champ.

 

How are your fuel trims on the Hahn?

 

My gauge for fuel trim says around 14 to 15, but I am not too sure exactly how the fuel trim is measured and what is the correct fuel trim for my car. I need to do some studying. It does seem to jump up drastically when I push in the clutch to slow down.

I am still gettting the 5psi boost issue from time to time. I haven't gottem a CEL code and it only seems to happen when I am in stop and go traffic. The car runs fine otherwise. I don't think it's the fuel trim, because I would probably be getting a CEL code, but I'm not sure.

Mods are GMS1 and hahn catless downpipe, which I have had no problems with and now Hahn CAI.

PS. 5 psi is slooooowwwwwwwww.

 

Correct me if I'm wrong but 14-15 is really high. 15% for extended period should set a lean code.

I get worried when I get over 8% with the K&N SRI. Mine ranges from +3-8%

I'm guessing you really need a tune. + or - 5 % is generally the accepted range before needing a tune.

Stock air box and filter runs right around 0 with GMS1.

 

Now I'm getting the P0101 Mass Airflow Sensor engine light. Went to Auto Zone and they pulled the code. The turbo goes in and out of limp mode randomly as I'm driving. I have a couple of options in mind, but really don't want to put the stock intake back on.

1. Go back to the stock intake and see if my problem goes away
2. Try this HoneyComb MAF Mass Air Meter Airflow Straightener HoneyComb MAF Mass Air Meter Airflow Straightener- TREADSTONE PERFORMANCE but im really not sure that this is legit.
3. Get the car tuned for the intake, but I am still under power train warranty for another 30k miles and I don't know of anyone in Louisiana that can do an HP tune. I really don't think I am advanced enough or have enough time to tune the car myself. I also don't want to pile one problem on top of another.

Any advice? Should I try to contact Hahn again. It is really hard to get in touch with them.

 

I put the stock intake back on and have had no problems since. I have contacted Hahn about the P0101 code that I was getting and here is the response.

Our product has not shown itself to be associated with this particular problem to date, so we’d suggest you take a close look at the installation. Perhaps something is amiss that would create an air leak in the system, which can throw off airflow measurements.

I am pretty sure that the install was solid. I checked and everything looked correct.

Has anyone had the same issue? Will I not be able to run this intake with the GMS1 tune?

 

You will probably have better luck with GMS1, but you would be better to get an aftermarket tune for it. GMS1 will still be off by quite a bit.

 

I have had the GMS1 tune installed since about a month after I got the car. I also have been having the 3" catless downpipe installed for at least a year.

After having issues with 5psi boost max with the new Hahn CAI installed and getting the P0101 code I decided to put the stock intake back on. I have had the stock intake on for about a month now and I have had absolutely no issues.

Should I just sell the Hahn Intake and go for something like K&N SRI or should I try installing the Hahn Intake again and see what happens.

Hahn says that I don't need a tune with this intake, but I really am starting to distrust Hahn. Does anybody on this site run the Hahn Intake with the GMS1 tune. Is this just a bad combination?

Someone please give me answers!!!!

 

I'll give my thoughts and share others opinions.

Sell the Hahn, many have said they don't have the same issues as you, but a lot of them haven't seen their fuel trims.

K&N sounds great, can be had for about $250. Powell and company don't believe it filters very well and needs to be cleaned frequently. Which is probably true. The fuel trims with it are ok but not great. Much better than Hahn.

Powell suggest running the stock intake box and filter with the ZZP upgraded elbow. It allows for more power, great filtering, low cost, and great fuel trims.

So K&N or stock intake with ZZP elbow are probably best.

Your last option is to keep Hahn and get a good tune, but that's much pricier.

 

Welcome!