Diagnostic Notes

This section is used to find correct test procedure for a given symptom. Symptoms and actions in this section are Emission related only. Refer to other sections for further diagnosis information. See Diagnosis By Symptom for proper testing sequence. Verify correct system application to ensure that the vehicle has the given component(s).

Before proceding to appropriate symptom perform the following inspection:

VISUALLY CHECK:

^ Vacuum hoses for splits, kinks and proper routing.
^ Ignition wires for cracking, hardness and proper connections at both distributor and spark plugs.
^ All wiring for proper connections, pinches, routing, and cuts.

NOTE: Catalytic converter and feedback systems do not operate until they are at operating temperature. It is essential that the vehicle has been properly warmed up and is at operating temperature (except when attempting to diagnosis a cold driveability problem). Failure to do so will result in inaccurate test results.