Lack of Power, Sluggishness, or Sponginess. Geo Tracker

For 1990-2009 cars only

Makes 🢒 Geo 🢒 1996 🢒 Tracker - 4WD 🢒 Engine 🢒 Engine Controls - 1.6L 🢒 Lack of Power, Sluggishness, or Sponginess

Checks

Action

DEFINITION: The engine delivers less than expected power. There is little or no increase in speed when partially applying the accelerator pedal.

Preliminary Checks

•	Refer to Powertrain On Board Diagnostic (OBD) System Check .

•	Refer to Symptoms .

•	Compare the customer's vehicle with a similar unit in order to determine if the customer has an actual problem.

•	Remove the air filter element and check for dirt or restrictions.

•	Check the transmission shift pattern and down shift operation.

Fuel System Checks

•	Check for a restricted fuel filter or incorrect fuel pressure

•	Check the fuel injectors. Perform the Fuel Injector Coil Test Procedure and the Fuel Injector Balance Test Procedure. Refer to Fuel Injector Solenoid Coil Test - Engine Coolant Temperature Between 10-35 Degrees C (50-95 Degrees F) and Fuel Injector Balance Test .

•	Check for contaminated fuel.

Ignition System Checks

•	Check for the proper ignition voltage output with a spark tester (J 26792 or equivalent).

•	Check the ignition timing and proper operation of the ignition control system. Refer to Ignition Timing Procedure.

Exhaust System Checks

•	Check the exhaust system for a possible restriction.

•	Inspect the exhaust system for damaged or collapsed pipes. Inspect the muffler for heat distress or a possible internal failure.

Additional Checks

•	Check the PCM grounds for being clean, tight, and in their proper locations. Refer to PCM Wiring Diagrams.

•	Check the EGR Valve for excessive flow or sticking open. Refer to Exhaust Gas Recirculation (EGR) System Diagnosis .

•	Check the generator output voltage.

Engine Mechanical Check

•	Check for any of the following engine mechanical problems:

-	Low compression

-	Incorrect valve timing

-	Incorrect or worn camshaft

•	Refer to Engine Mechanical.