What kind of "intake" do you have? Also did you have to remove the MAF when installing the intake? If so, might want to recheck the placement of the MAF. Easy enough to place it upside down where the air isn't being metered correctly....?
Here's another thing for you if you didn't do it already. Take off the negative terminal of your battery and let the ECU go blank. Some people say 30min. but give it as much time as you can.
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