No. You cannot swap bigger injectors without a tune. If you're N/A you don't need bigger injectors on the 2.0 until you're breaching about 180WHP then you'll need larger injectors. Remember, MORE FUEL isn't MORE POWER. More air is more power if you can feed enough fuel to keep up within a 12.5:1 AFR at WOT.

Your 2008 ECM is too finicky for a cold air intake. Try swapping for a 2004 ECM out of the junkyard and see if that helps.

 

Will the ecm work as a direct swap or will it need to be modified

 

The ECM will be a direct swap as long as it's a SIMK43 ECM from about (mid)2003-2004 and from a MAF based CVVT car. The MAP based non-CVVT 2002-(early)2003 cars will not be compatible at all. The 2005-2006 ECMs will work as well but they also can be finicky to an extent. Not as bad as the 2007-2008 ECMs. Make sure the transmission type is the same on the donor car or you will have issues.

 

wait so I have a 2007 SE, you're saying I have to ECU swap or get a tune if I wanna put the Injen cold air on my car?

 

This is what I found. It's a simk43 but these hookups are different from what I have

 

Is that even an ECU? Looks different somehow....

 

The sockets should be the same unless you bought the wrong transmission type. The dual sockets are from an automatic car while the single socket is from a manual car. Do you have a manual car by chance?

 

Are the 08's much more sensitive than the 07s? Because I have cold air on my 07 GT and have never had any lean codes (though I did have O2 codes with headers). That said, when I had my 05 I did get lean codes and I had to reset the ECU a few times to get it to relearn the fuel mix. I'd start there before you go swapping other parts.

 

No mines a automatic trans

 

Well if that socket and plugs don't match up you must not have a GS 2.0... You must have a GT or SE 2.7L with the 5 plugs. In your first post you said you had a GS... If that's the case you want a 2.7L ECM with 5WY17 or 5WY18 on the label just below the Siemens logo. Or Z4, Z8, ZC, JS, JN on the socket label.

@peachferrari the 07/08 ECMs are nearly identical in the way they can trip a lean code from a CAI. Injen is really the only one that works consistently because of the slightly smaller diameter leading into the MAF speeding up air velocity and tricking the ECM into providing a little more fuel.

 

@peachferrari the 07/08 ECMs are nearly identical in the way they can trip a lean code from a CAI. Injen is really the only one that works consistently because of the slightly smaller diameter leading into the MAF speeding up air velocity and tricking the ECM into providing a little more fuel.

Interesting that mine has never thrown a lean code. I just have a no-name Ebay CAI on it with a good AEM filter. When I bought the car it had a "hot air" intake with just an elbow off the throttle body and the filter sitting behind the battery. That didn't trip a code either. On my 05 I had an Injen SRI (filter right behind the headlight) and it initially tripped codes for both banks lean, but after resetting the ECU a couple of times it went away and never came back.