Visual/Physical Check

Several of the symptom procedures ask for a Careful Visual/Physical Check. This step is extremely important it 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.
^ 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. Refer to Emission Hose Routing Diagram. Emission Control Systems
^ 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, Mass Air Flow (MAF) sensor, and the intake manifold sealing surfaces.
^ The ignition wires for cracking, hardness, proper routing and carbon tracking.
^ The engine harness wiring and terminals for proper connections, pinches or cuts. Refer to Diagrams.