Checking the Basics - Read Before Proceeding

Before using this section you should have done a diagnostic check of the on-board computer control system and verified;
- PCM operation
- There are no Diagnostic Trouble Codes (DTC's) stored.

SYMPTOMS
Verify the customers complaint, and locate the correct symptom in the table.
- Check the item indicated under that symptom.

VISUAL/PHYSICAL CHECK
This check should include:
- PCM grounds for being clean, tight, and in their proper location(s).
- Vacuum hoses for splits, kinks, and proper connections. Check thoroughly for any type of leak or restriction.
- Vacuum leaks at all mounting areas of the intake manifold sealing surfaces.
- Ignition secondary wires for cracking, hardness, proper routing, or carbon tracking.
- Wiring for proper connections, pinches, and cuts.