Visual/Physical Inspection

Several of the symptom checks call for a thorough visual/physical inspection. Of all the symptom checks listed a thorough visual/physical inspection is the most important. It can lead to correcting a problem without further checks and can save valuable time.

A thorough visual/physical inspection should include:

• Ensure ECM/PCM grounds are clean, tight, and properly located.
• Check vacuum hoses for splits, kinks, leaks, restrictions, and proper connections, as shown on Vehicle Emission Control Information Label.
• Check for air leaks at throttle body mounting area and intake manifold sealing surfaces.
• Ignition wires for cracking, hardness, proper routing and carbon tracking.
• Check wiring for proper connections, pinches and cuts.