11. Reconnect the heater hose to the back of the intake manifold.
12. Now set the upper intake plenum assembly on top of the intake manifold. Insert the intake plenums five bolts, and tighten them to 20-25 ft*lbs. Reconnect the EGR valve, and plug in the electrical connectors for the IAC valve and TPS sensor. Reconnect the vacuum line to the back of the intake plenum, and mount the throttle cable bracket to the intake plenum. Then connect the throttle cable, cruise control, and throttle spring.
13. Install the small colored vacuum lines back to their respective locations (EGR valve, driver’s side fuel rail, intake plenum, and to the bracket on the back of the intake manifold). Also reconnect the PCV valve’s vacuum line to the upper intake plenum.
14. Reinstall the upper intake tube by sliding it into the MAF housing and then into the throttle body. Tighten the clamps with the flathead screwdriver. Reconnect the vacuum lines that run from the intake tube to the driver’s side valve cover and to the IAC valve.
15. Fill the radiator with antifreeze. Reinstall the serpentine belt and double check that it is on all pulleys correctly.
16. Installation is finished. Reconnect the negative battery terminal and recheck all electrical and vacuum line connections. Turn the car’s ignition to the ACCESSORY position. Do this several times to prime the fuel pump for a cleaner initial start-up. Once the motor is on, inspect under the hood with a flashlight for any leaks or strange noises. Monitor the gauges for a check engine light. Add coolant as needed.