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


Initial timing ^ Check Distributor Assembly installation.


Incorrect spark advance ^ Check Spark Controls,


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


Restricted exhaust system ^ Check Catalytic Converter, Catalytic Converter


Poor or contaminated fuel ^ Recommend higher grade fuel