Surge, Hesitation, Stall on Acceleration

Engine hesitates or stumbles on acceleration, sometimes stalling. This condition can occur at any speed, but primarily from a stop. Vehicle may also experience a surge or rise and fall of engine speed at cruise or steady throttle.

POSSIBLE CAUSE ACTION


Electrical misfire Inspect ignition system

EGR malfunction Check EGR system, Exhaust Gas Recirculation

Incorrect Air-Fuel mixture Check Air-Fuel ratio, perform injector balance test, inspect regulator operation (check vacuum line and return hose), check fuel pressure

Incorrect spark advance Check Spark Controls,

Faulty canister purge Check Fuel
liquid fuel in carbon canister Evaporative system, Evaporative Emissions System

Restricted exhaust system Check Catalytic Converter, Catalytic Converter

Poor or contaminated fuel Recommend higher grade fuel