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


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


Initial timing - Check Distributor Assembly installation


Incorrect spark advance - Check Spark Controls,


Faulty canister purge - Check Fuel Evaporative system.

Liquid fuel in carbon canister


Restricted exhaust system - Check Catalytic Converter


Poor or contaminated fuel - Recommend higher grade fuel