Visual/Physical Check

Several of the symptom procedures call for a careful visual/physical inspection. This inspection can lead to correcting a problem without further checks and can save valuable time. This check should include the following items:
^ The ECM grounds for being clean, tight, and in the proper location.
^ The vacuum hoses for any splits or any kinks, and proper connections, as shown on the Vehicle Emission Control Information label. Check thoroughly for any type of leak or restriction.
^ The air intake ducts for collapsed or damaged areas
^ Air leaks at the throttle body mounting area, the Mass Air Flow (MAF) sensor, the duct work between the MAF and the throttle body, and the intake manifold sealing surfaces.