- Visual/Physical Underhood Inspection

Several of the symptom procedures call for a careful Visual/Physical. It can lead to correcting a problem without further checks and can save valuable time. This check should include the following items:

- PCM grounds for being clean, tight, and in their proper location.

- Vacuum hoses for splits, kinks, and proper connections, as shown on Vehicle Emission Control Information label. Check thoroughly for any type of leak or restriction.

- Mass Air Flow (MAF) sensor installation. The arrows on the plastic portion of the sensor must point toward the engine.

- Air intake ducts for collapsed or damaged areas.

- Air leaks at throttle body mounting area, Mass Air Flow (MAF) sensor and intake manifold sealing surfaces.

- Ignition wires for cracking, hardness, proper routing and carbon tracking.

- Wiring for proper connections, pinches and cuts.