Engine Controls - Trouble Shooting - No Codes: Symptoms: Backfire

Check listed items as follows:

• Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
• Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
• Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.