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 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 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 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 engine compression. Check engine mechanical condition. Check intake manifold gasket, camshaft and valves.
• On A/T vehicles, ensure transmission is functioning properly. If engine stalls during transmission engagement, check transmission solenoids. See TRANSMISSION SERVICE & REPAIR article.
• Check for binding/dragging brakes.
• Check if A/C turns off under Wide Open Throttle (WOT) conditions. See A/C DOES NOT TURN OFF DURING WOT symptom.
• On M/T vehicles, check clutch operation. On all vehicles, check charging system. Check customer driving habits (i.e., driving with excessive loads). If no problems are indicated, return to SYMPTOM DIAGNOSIS  to identify any additional symptoms or go to CIRCUIT TEST Z in appropriate article and check for intermittent faults:

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 .