Diagnosis & Testing: Testing: Notes

The steps listed in the following charts provide a systematic evaluation of each component that could cause an operational malfunction. After completing a repair, repeat the test to ensure that the malfunction has been corrected.

If problem still exists after completing test procedures, check other engine systems which may affect air/fuel mixture, combustion efficiency or exhaust gas composition. These systems include:

• Basic carburetor adjustments.
• Mechanical engine operation (plugs, valves, rings).
• Ignition system.
• Intake manifold, carburetor or base plate gaskets.