Hesitation, Sag, Stumble

SYMPTOM DESCRIPTION
Momentary lack of response when the accelerator is pushed down. Can occur at any speed. Usually most severe from a stop or initial take off. Engine may stall if condition is bad enough.




SYSTEM OR COMPONENT TO CHECK ACTION



FUEL CHECK FUEL PRESSURE
Related Tests, Information and Procedures




IGNITION CHECK Spark plug wires for being faulty.
Spark plugs for being fouled.
Open ignition system ground CKT 453.
Ignition timing.





EMISSIONS CHECK EGR SYSTEM Valve operation.
EVAPORATIVE SYSTEM Cannister purge system
operation.



ENGINE CHECK Generator output voltage. Repair, if less
than 9 or more than 16 volts.