Visual/Physical Check

Several of the symptom procedures ask for a careful inspection. This step is extremely important. This inspection can lead to correcting a problem without further checks and can save valuable time. This check includes the following inspections:

• The PCM grounds for being clean, tight, and in the proper location
• Vacuum hoses for splits, kinks, and proper connections, as shown on the Vehicle Emission Control Information label-Check thoroughly for any type of leak or restriction.
• The mass air flow (MAF) sensor installation-The arrows on the plastic portion of the sensor must point toward the engine.
• The air intake ducts for being collapsed or for having damaged areas
• Air leaks at throttle body mounting area, MAF sensor, and the intake manifold sealing surfaces
• The ignition wires for cracking, hardness, and carbon tracking
• The engine harness wiring and terminals for proper connections, pinches, or cuts