Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1991CUTAWAY 5.8 H, C6REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/O CODES - GASOLINEROUTINE 204 - ROUGH IDLE
1991 Ford Cutaway 5.8 H, C6
Routine 204 - Rough Idle
1991 Ford Cutaway 5.8 H, C6SECTION Routine 204 - Rough Idle
ROUTINE 204 - 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 & 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 |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.