Dodge spirit rough idle solution

Answer 1

rough idle could be caused by the Throttle Position Sensor that's located on the passenger side of the throttle body or the Idle Air Control Valve that's on the front of the Throttle Body.

Another possibility is intermittent wiring problems, check the wiring exiting from the distributor base, it is prone to damage. Other places where wiring gets damaged in old cars such as my spirit R/T 1991, are the connector wiring that connects to the AIS valve and/or the connector to the TPS (Throttle Position Sensor). another one to check is the connector on the Coolant Temperature Sensor that gets disconnected everytime the ignition timing is adjusted, such that it tends to break the wires under the insulation, close to the connector. Amclaussen.