Intermittent Problem Diagnosis

Intermittent fault testing requires duplicating circuit or component failure to identify the problem. These procedures may lead to the PCM setting a fault code, which may help in diagnosis. If fault code is not present, check for intermittents. See CIRCUIT TEST Z in appropriate article:

For 4.2L Van, see TESTS W/CODES - 4.2L .

For 4.6L Van, see TESTS W/CODES - 4.6L .

For 5.4L Van, see TESTS W/CODES - 5.4L GASOLINE .

For 6.8L Van, see TESTS W/CODES - 6.8L .

For 4.2L Pickup, see TESTS W/CODES - 4.2L .

For 4.6L Pickup, see TESTS W/CODES - 4.6L .

For 5.4L Pickup, see TESTS W/CODES - 5.4L GASOLINE .