Lack of Power/Sluggish/Spongy/Stumble

SYMPTOM DESCRIPTION
Engine delivers less than expected power. Little or no increase in speed, when accelerator is pushed down part way.




SYSTEM OR COMPONENT TO CHECK ACTION


FUEL CHECK FUEL PRESSURE
Related Tests, Information and Procedures
Contaminated fuel
Restricted fuel filter.




IGNITION CHECK Proper ignition voltage output with
spark tester J 26792 or equivalent ( ST-125).
ELECTRONIC SPARK TIMING (EST) operation.
Testing and Inspection
TIMING.





EMISSIONS CHECK EGR SYSTEM Valve operation.
Exhaust Gas Recirculation





EXHAUST CHECK RESTRICTION
Testing and Inspection




ENGINE/TRANSMISSION CHECK GENERATOR OUTPUT VOLTAGE Repair, if less
than 9 or more than 16 volts.
A/C operation.
Engine compression.
Engine valve timing.
Engine camshaft for wear and proper
application.
TORQUE CONVERTER CLUTCH (TCC) operation.
transmission shift points.