Symptom Checks

Check the following items:

• Check the following Parameter Identification (PID) values: DPFEGR, ECT, IAC, LONGFT 1, LONGFT 2, VPWR and VREF. See appropriate article:

For Contour & Mystique 2.0L, see PIN VOLTAGE CHARTS .

For Contour & Mystique 2.5L, see PIN VOLTAGE CHARTS .

For Windstar 3.0L, see PIN VOLTAGE CHARTS .

For Windstar 3.8L, see PIN VOLTAGE CHARTS .

• Check secondary ignition system. See CIRCUIT TEST JB in appropriate article:

For Contour & Mystique 2.0L, see TESTS W/CODES - 2.0L .

For Contour & Mystique 2.5L, see TESTS W/CODES - 2.5L .

For Windstar, see TESTS W/CODES .

• Check fuel delivery system. See CIRCUIT TEST HC in appropriate article:

For Contour & Mystique 2.0L, see TESTS W/CODES - 2.0L .

For Contour & Mystique 2.5L, see TESTS W/CODES - 2.5L .

For Windstar, see TESTS W/CODES .

• Check exhaust system. See CIRCUIT TEST HF in appropriate article:

For Contour & Mystique 2.0L, see TESTS W/CODES - 2.0L .

For Contour & Mystique 2.5L, see TESTS W/CODES - 2.5L .

For Windstar, see TESTS W/CODES .

• Check PCV system. See CIRCUIT TEST HG in appropriate article:

For Contour & Mystique 2.0L, see TESTS W/CODES - 2.0L .

For Contour & Mystique 2.5L, see TESTS W/CODES - 2.5L .

For Windstar, see TESTS W/CODES .

• Check engine mechanical condition. Check intake manifold gasket, camshaft and valves.
• Check for contaminated Mass Airflow (MAF) sensor.
• Ensure engine operates at normal operating temperature.
• Ensure transmission operates properly.
• Check for dragging brakes.