Symptom Checks

Check the following items:

• With engine running, check if idle speed decreases or engine stalls when IAC valve is disconnected. If idle speed does not decrease or if engine does not stall, check for IAC system fault. See CIRCUIT TEST KE 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 .

• On A/T vehicles, torque converter may not be functioning properly. See TRANSMISSION SERVICE & REPAIR article for symptom diagnosis.
• Check fuel delivery fuel 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 air intake system. See CIRCUIT TEST HU 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 compression, camshaft, valve train components, etc. If mechanical condition is okay, 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 .