FixVault

Engine Is Unstable While Driving

Inspection Procedure Possible Cause
  1. Inspect fuel pressure
  2. Inspect ignition system
  3. Inspect Engine Coolant Temperature Sensor (ECTS) and circuit (Check the DTC)
  4. Inspect long-term fuel trim and short-term fuel trim
  5. Inspect and test Electronic Throttle Control (ETC) module
  6. Inspect exhaust system
  • Check the DTC
  • Low fuel pressure
  • Intake air leakage
  • Contaminated fuel
  • Weak sparks when ignited