Engine Controls - Tests W/O Codes 3.0L & 3.4L: Introduction
Before diagnosing symptoms or intermittent faults, perform BASIC DIAGNOSTIC PROCEDURES in appropriate article:
- For 3.0L vehicles, see BASIC TESTING - 3.0L .
- For 3.4L vehicles, see BASIC TESTING - 3.4L .
Also, perform QUICK TEST in in appropriate article:
- For 3.0L OHV gasoline vehicles, see TESTS W/CODES - 3.0L OHV GASOLINE .
- For 3.0L OHV Flex-Fuel vehicles, see TESTS W/CODES - 3.0L OHV FLEX-FUEL .
- For 3.0L DOHC vehicles, see TESTS W/CODES - 3.0L DOHC .
- For 3.4L vehicles, see TESTS W/CODES - 3.4L .
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 ADJUSTMENTS
or SPECIFICATIONS
article:
- For 3.0L vehicles, see ADJUSTMENTS - 3.0L .
- For 3.4L vehicles, see ADJUSTMENTS - 3.4L .
- For 3.0L OHV vehicles, see SPECIFICATIONS - 3.0L OHV .
- For 3.0L DOHC vehicles, see SPECIFICATIONS - 3.0L DOHC .
- For 3.4L vehicles, see SPECIFICATIONS - 3.4L .