VVC AUTO 85.5 - Smog Technician - Level 1 - Hydrocarbons

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VVC AUTO 85.5 - Smog Technician - Level 1 - Hydrocarbons

  1. 1. • Raw fuel is primarily made up of Hydrocarbons (HC). • Should be almost completely broken apart by the combustion process. • If there is a lack of combustion (misfire), some of the Hydrocarbons pass through unburned and out the tailpipe. • Variations in the combustion event (imperfect combustion) allow HC’s to pass through unburned. • Catalytic Converter can only deal with a normal amount of HC’s.
  2. 2. • Engine integrity issues (lack of compression, lack of vacuum). • Ignition timing. • Ignition system malfunctions. • Rich misfires (high fuel pressure, regulator and/or injector leaks). • Lean misfires (low fuel pressure, dirty injector, vacuum leaks). • Poor fuel vaporization. • Air Injection system malfunction. • Excessive EGR. • Catalytic Converter operation

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