I just order an injen intake and have not installed it any sugestions?

Make sure when you are reinstalling everything that you have your MAF (The black tube in the middle of the intake) pointed in the right direction. There is an arrow labeled flow on the MAF, that arrow should point toward the throttle body. If some of the couplers are hard to get on spary some WD40 on your fingers and put a light coat of in on the inside of the coupler.

and when you're through with the installation, reset the ECU so that the higher airflow will be taken into account by the chip

hwo do u reset the ecu in a 2004 spec v?