1. Fuel System Issues:
* Fuel Injectors: Clogged or faulty injectors can cause a misfire and fuel to be sprayed into the engine where it doesn't burn properly, leading to a rough idle and gas smell.
* Fuel Pressure Regulator: A faulty regulator can cause excessive fuel pressure, leading to a rich fuel mixture and a rough idle.
* Fuel Pump: A failing fuel pump can't deliver enough fuel, causing erratic engine operation and a gas smell.
* Fuel Lines: Leaks in the fuel lines can cause fuel to evaporate and create a strong gas smell.
2. Ignition System Problems:
* Spark Plugs/Wires: Worn or fouled spark plugs can cause misfires, resulting in a rough idle and unburnt fuel.
* Ignition Coil: A faulty coil can prevent spark to a specific cylinder, leading to a misfire and gas smell.
3. Air Intake System:
* Air Filter: A dirty air filter can restrict airflow, causing a lean fuel mixture, leading to a rough idle and a possible fuel smell.
* Intake Manifold Leaks: Cracks or leaks in the intake manifold can cause unmetered air to enter the engine, leading to a lean mixture and a rough idle.
* Vacuum Leaks: Vacuum leaks can create a lean fuel mixture, causing erratic engine operation and a possible gas smell.
Troubleshooting Steps:
1. Check Engine Light: If the check engine light is on, have it scanned at an auto parts store or mechanic to get a diagnosis code.
2. Inspect for Leaks: Visually check for any leaks in the fuel lines, intake manifold, and vacuum lines.
3. Check Spark Plugs: Inspect the spark plugs for wear, fouling, or damage.
4. Replace Air Filter: Ensure the air filter is clean.
5. Test Fuel Pressure: If you have the equipment, test fuel pressure to ensure it's within specifications.
6. Consider Professional Inspection: If you are unsure about any of the above steps or can't find the problem, it's best to take your Windstar to a trusted mechanic for a thorough inspection.
Safety Note: Be extremely cautious when working with gasoline. Never attempt repairs while the engine is running, and ensure good ventilation. Always wear safety glasses and gloves when working with fluids or electrical components.
By addressing these common issues, you can hopefully resolve your Ford Windstar's rough idle and gas smell problem.
