Engine Surges

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Mitsubishi Outlander, 2003 Mitsubishi Montero Sport, 2003 Mitsubishi Montero, 2003 Mitsubishi Lancer, and 2003 Mitsubishi Galant. However, it is still accessible from the selected car via links, so may be relevant.

Using scan tool, perform actuator tests for fuel injectors.
Check wiring between injectors and ECM/PCM.
Check ignition timing.
Using scan tool, check closed throttle position switch (if applicable), IAT sensor, BARO sensor, ECT sensor, TP sensor, EGR solenoid and front and rear HO2S values.
Using scan tool, perform actuator test for EGR solenoid.
Check fuel pressure.
Check for vacuum leaks.
Check PCV valve operation.
Check for clogged injectors.
Check ignition system.
Check EGR system.