Inspections
| Action
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DEFINITION: The engine has a power variation under a steady throttle or cruise. The vehicle feels as if it speeds up and slows down with no change in the accelerator pedal position.
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Preliminary Inspections
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| • | Be sure that the driver understands the torque converter clutch operation. |
| • | Be sure that the driver understands the A/C compressor operation. |
| • | Ensure that the transmission fluid is at the proper level. |
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Sensor/System
| Display the scan tool parameters for the various engine controls sensors. Inspect for any abnormal readings.
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Fuel System
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| • | Inspect for a rich or lean symptom that causes the condition. Drive the vehicle at the speed of the complaint. Monitoring the fuel trim will help identify the condition. |
| • | Lean -- The long term fuel trim will be more than 150. |
| • | Rich -- The long term fuel trim will be less than 115. |
| • | Inspect the in-line fuel filter for a restrictions. |
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Ignition System
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| • | Inspect the spark plugs. Remove the plugs and inspect for the following conditions: |
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Additional
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| • | Inspect the vacuum hoses for kinks or leaks. |
| • | Inspect the exhaust system for a possible restriction. Refer to
Restricted Exhaust
in Engine Exhaust. |
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