You should turn the ignition off, remove the fuel injector sight shield and the air inlet duct, disconnect the brake booster vacuum hose from the
Intake Manifold, the purge solenoid valve electrical connector, and the purge line, remove the wiring harness retainer, disconnect the throttle body electrical connector, remove the upper intake manifold brace stud, bolt, and brace, disconnect the positive crankcase ventilation (PCV) hose, the barometric pressure sensor electrical connector, and the intake manifold runner control solenoid electrical connector, remove the injector harness bracket bolt, the left bank ignition coil wiring harness from the bracket, the upper intake manifold bolts and the upper intake manifold with the throttle body and clean and inspect the intake manifold.