13.Now remove the Air Injection Reaction (AIR) system tube (some call this the EGR tube) on the intake manifold behind the throttle body. To do this, squeeze the gray sliding tab on the side of the connector into its body while wiggling it to the side of the mounting tube and then lightly pulling up. Once off, you should look at the connector from the inside; you can just barely see the locking tab slid over inside the body. This step is mainly done if you are removing the intake, which we will do here, as this if the first time removing the engine and chances of you finding the proper wires behind the intake are slim. Intake R&R is easy, too.