Engine Hesitates, Or Poor Acceleration
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.
- Check for injector operation sound.
- Check ignition system.
- Using scan tool, check IAT sensor, BARO sensor, ECT sensor, TP sensor, and front and rear HO2S values.
- Using scan tool, perform actuator tests for fuel injectors and EGR solenoid.
- Check fuel pressure.
- Check for vacuum leaks.
- Check PCV valve operation.
- Check for clogged injectors.
- Check ignition timing.
- Check EGR system.
- Check compression.
- Check fuel filter and fuel line for clogging.
- Ensure electrical harness, connectors and wires are not broken, bent or loose.