SHELBY GT 350 Member
Joined: Jan 2011
Location: Central Massachusetts
Yes I think it could be caused by the CAI.
I am not sure about that particular model; but I know some of the "no tune required" CAI's have an insert that makes it "no tune required" or if you remove it, then you need a tune. So make sure the insert is installed correctly, if that intake has one. Also double-check the MAF sensor installation; and if you had to oil the filter, clean the MAF sensor because it might have oil on it.
Another thing is it might be on the borderline of needing a tune. The reason an aftermarket intake needs a tune is that the mass air flow metering section is bigger than the original factory intake. This means that the readings from the Mass Air Flow (MAF) sensor are "wrong" because they are calibrated for the original diameter. The "tune" adjusts this to correct the readings for the larger diameter, to correctly measure how much air is coming in. The EFI system can self-adjust a certain amount, I am not sure how much, without that calibration. So I'm guessing that maybe that CAI is slightly larger than the factory one, which makes it "borderline" for what the computer can self-adjust for . . . but that is just a guess.
Maybe you can contact BBK directly and ask them about it?
| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day