So I couldn't find a post on this under the impreza forums and well I feel as its a noob question so I'll post it here.

So I own a impreza 2.5i prem and with every vehicle iv owned before an after market intake was first on my list so I picked up a basic after market intake cone filter and tubing.

After removing the air box and tubing install sensor into new piping and adding the cone filter I started the car and had a very hard idle and kicked check engine light so a little looking around I found the you need a tuner to do any mods to the car.

So my question is, is this true I must have a tuner.
If so what would work for my car due to understanding and i may be wrong but Cobb access ports don't work with non turbo models.
And if not what could I be doing wrong or is there something else I need to adjust when I installed it

Thanks in advance

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