Engine Controls - Tests W/O Codes: Introduction

Before diagnosing symptoms or intermittent faults, perform BASIC DIAGNOSTIC PROCEDURES in appropriate article:

For Contour & Mystique 2.0L, see BASIC TESTING - 2.0L .

For Contour & Mystique 2.5L, see BASIC TESTING - 2.5L .

For Windstar, see BASIC TESTING .

Also, perform QUICK TEST 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 .

Use this article to diagnose driveability problems existing when a hard fault code is not present.

NOTE: Some driveability problems may have been corrected by manufacturer with a revised Powertrain Control Module (PCM). Check with manufacturer for latest PCM application.

Symptom checks can direct the technician to malfunctioning component(s) for further diagnosis. A symptom should lead to a specific component or system test and/or adjustment.

Use intermittent test procedures to locate driveability problems that DO NOT occur when the vehicle is being tested. These test procedures should also be used if a soft (intermittent) trouble code was present, but no problem was found during self-diagnostic testing.

NOTE: For specifications, see appropriate article(s):

For Contour & Mystique 2.0L, see ADJUSTMENTS - 2.0L or SPECIFICATIONS - 2.5L article.

For Contour & Mystique 2.5L, see ADJUSTMENTS - 2.5L or SPECIFICATIONS - 2.5L article.

For Windstar 3.0L, see ADJUSTMENTS or SPECIFICATIONS - 3.0L article.

For Windstar 3.8L, see ADJUSTMENTS or SPECIFICATIONS - 3.8L article.