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


EGR malfunction Check EGR system in "Testing
flange gasket leaking, Procedures"
excessive backpressure,
loose valve



Spark timing Check Spark Controls in
"Computerized
Engine Controls"




Air management valves Check Air Injection system in
"Testing Procedures"





Faulty canister purge Check Evaporative system in
liquid fuel in carbon canister "Testing Procedures"



Ignition timing Check Ignition Timing in "Adjustment
Procedures"



Restricted exhaust system Check Catalytic Converter system in
"Testing Procedure"



Poor or contaminated fuel Recommend higher grade fuel