Hesitates or Stalls On Acceleration

Definition: Momentary lack of response as the accelerator is pushed down. Can occur at any vehicle speed. Usually most severe when first trying to make the vehicle move, as from a stop sign. May cause the vehicle to stall if severe enough.

POSSIBLE CAUSE ACTION

Poor or contaminated fuel - Check for excessive alcohol content
- Recommend higher grade fuel

Fuel Metering - Check air/fuel ratio, (O2 Sensor Voltage)
- Perform CYLINDER BALANCE TEST
- Check fuel pressure, (check vacuum line and return hose)
- Perform injector service (cleaning), refer to SERVICE AND REPAIR

Air Induction - Check air cleaner duct and valve door not operating properly, IA4 - Air Cleaner Duct and Valve System Diagnosis
- Check for bimetal sensor inoperative, IA2 - Air Cleaner Temperature (BI-Metal) Sensor Diagnosis
- Check for vacuum motor inoperative, IA1 - Air Cleaner Vacuum Motor Diagnosis