Visual/Physical Check

Several of the symptom procedures ask for a Careful Visual/Physical Check. This step is extremely important, and can lead to correcting a problem without further checks and can save valuable time. This check includes:
^ The PCM grounds for being clean, tight, and in their proper location
^ The 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 the throttle body mounting area, the Mass Air Flow (MAF) sensor, and the intake manifold sealing surfaces
^ The ignition wires for cracking, for hardness, for proper routing and for carbon tracking
^ The engine harness wiring and terminals for proper connections, pinches or cuts