Routine 204 - Rough Idle
ROUGH IDLE
| SYSTEM & COMPONENT(S) | GO TO: |
|---|---|
| COOLING Fan or Electric Fan (Loose or Cracked) | Perform a visual inspection |
| IGNITION Scope Engine for: Spark Plug, Coil, Secondary Wires, Distributors Cap, Adapter, Rotor & Ignition Timing | See SYSTEM/COMP TESTS |
| EEC Quick Test | See TESTS W/CODES |
| FUEL CHARGING ASSY Curb or Fast Idle Speed, Electrical & Vacuum Connections | See SYSTEM/COMP TESTS See ADJUSTMENTS |
| FUEL DELIVERY Fuel Pressure Regulator, Injectors, Fuel Rail | See SYSTEM/COMP TESTS |
| VACUUM DISTRIBUTION Vacuum Leaks | Perform a visual & audible inspection |
| EGR Valve, Vacuum Regulator | See SYSTEM/COMP TESTS |
| COOLING Thermostat | Check cooling system |
| BASIC ENGINE Compression, Valve Train, Camshaft, Intake Manifold Gaskets | Check engine mechanical condition |
| PCV Valve | See SYSTEM/COMP TESTS |
| EVAP Components | See SYSTEM/COMP TESTS |
| EXHAUST Pipes, Muffler, Catalyst Resonator, Heat Control Valve | Check exhaust system |