Visual/Physical Check
Several symptom procedures call for a careful visual/physical check. The importance of this step cannot be stressed too strongly. It can lead to correcting a problem without further checks and can save valuable time.
This check should include:
- PCM/ECM grounds for being clean, tight, and in their proper location.
- Air leaks at throttle body mounting area and intake manifold sealing surfaces.
- Wiring for proper connections, pinches and cuts.