Lack of Power/Sluggish/Spongy/Stumble

Definition: Engine delivers less than expected power. Little or no increase in speed when accelerator pedal is pushed down part way.

^ Compare customer's car to similar unit. Make sure the customer's car has an actual problem.

^ Remove air cleaner and check air filter for dirt, or for being plugged. Replace as necessary.

^ Check for loose or leaking air duct between Mass Air Flow Sensor and throttle body.

^ Check ignition timing. See Emission Control Information label.

^ Check for restricted fuel filter, contaminated fuel or improper fuel pressure. See CHART A-7.

^ Check EGR operation for being open or partly open all the time CHART C-7, or C-7A.

^ Check for an exhaust system restriction:

^ Inspect exhaust system for damaged or collapsed pipes.

^ Inspect muffler for heat distress or possible internal failure.

^ Check generator output voltage. Repair if less than 9 or more than 16 volts.

^ Check engine valve timing and compression.

^ Check engine for proper or worn camshaft.