Intake issue on a 2013 wrx

**Fork808** · 11-03-2012 01:20 AM

first of all I am not sure if this is the right spot for this thread, if it isnt please slander me on the internet until the end of time, or till i fix it and put it in the right spot, but if it is the right spot then

So this is whats going on, i just got a new Cobb SF shot ram intake for my 2013 wrx, install went easy but my car does not like the intake at all, at higher RPM's it stutters and runs rough, double checked everything, disconnected the battery during install, so im not sure whats going on. anyone have any ideas? i remember seeing someone saying that if you install anything you should get your ecu tuned to work with it, i didnt think that installing a intake would make my car run that bad ~_~
mind you my other cars i worked on was a 95 GS-T Eclipse and a 2004 wrx which both took the new intakes like champs. so any help to this issue would be great, thanks all!

**vu_tang** · 11-03-2012 02:05 AM

Your ECU doesn't know what to do with all the extra air. You are damaging your motor without a tune. Uninstall the intake or get a tune before you do long term damage.

**Fork808** · 11-03-2012 02:11 AM

see thats what i figured, makes me sad, im so use to just install and go, boo lol.

**Calvinball** · 11-03-2012 08:14 AM

You absolutely must tune for an intake on the 3rd gen cars.

That said, it almost sounds like there could have been a leak too.

**shadidd** · 11-03-2012 02:00 PM

Cobb AP is what you need.

Sent from 125mph

**jilty** · 11-03-2012 02:06 PM

I picked up the same intake with the box from a buddy 2 weeks ago, just waiting on Cobb to take my money once the 2013 maps are out.....told me they are waiting on 2013s to test on....if only I lived in texas.

**starkall** · 11-03-2012 02:18 PM

Cobb has stated that a tune is not required for their intake but highly recommended to get the power gains of the intake. Rallysport direct says the same. As long as the intake has the same size Maf tube it'll be ok but I still recommend a tune to get the performance gains of the intake.

**zax** · 11-03-2012 02:25 PM

I doubt it's the intake. Cobb has designed the SF intake to mimic the airflow of the stock intake across MAF sensor. Are you sure that you installed the MAF correctly (not backwards) and that it's connected? Any CELs?

**Yamahar6311** · 11-03-2012 03:36 PM

You'll run it too lean if you keep it. Need AP STG 1 map

**zax** · 11-03-2012 03:45 PM

Originally Posted by Yamahar6311

You'll run it too lean if you keep it. Need AP STG 1 map

Do you have any empirical data to prove this statement? Or are you just regurgitating what you've heard?

**Yamahar6311** · 11-03-2012 04:15 PM

Yes sir. I have the same intake. And when I first got it and didn't have the AP the check engin light came on and it clearly reads lean

**starkall** · 11-03-2012 04:57 PM

You can run the SF intake without a tune and it will be fine. But it provide no performance gains and be a just a noise maker until tuned.

**zax** · 11-03-2012 08:47 PM

Originally Posted by Yamahar6311

Yes sir. I have the same intake. And when I first got it and didn't have the AP the check engin light came on and it clearly reads lean

Do you have a wideband O2 sensor installed? If not, you cannot make this judgement. A "System too lean" can mean a number of things.

**Yamahar6311** · 11-03-2012 08:52 PM

Once again, I'm just going from what happened to me. My opinion is just one of many. It's up to the person who started the post to make their decision.