Symptom Checks

Check the following items:

• Check secondary ignition system. See CIRCUIT TEST JB 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 .

• Check fuel delivery system. See CIRCUIT TEST HC in appropriate TESTS W/CODES article.
• Check exhaust system for restriction. See CIRCUIT TEST HF 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 .

If no problems are indicated, return to SYMPTOM DIAGNOSIS  to identify any additional symptoms or go to CIRCUIT TEST Z in appropriate TESTS W/CODES article and check for intermittent faults.