Inspection
| Action
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DEFINITION: The vehicle has a momentary lack of response when pushing down on the accelerator. The condition can occur at any vehicle speed. The condition is usually most severe when trying to make the vehicle move from a stop. If sever enough, the condition
may cause the engine to stall.
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Preliminary Inspection
| Refer to
Symptoms - Engine Controls
.
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Fuel System Inspection
|
| • | Inspect for high fuel supply system vacuum after a cold start or during moderate or full throttle acceleration. If the vacuum jumps above specification, there is a restriction in the fuel system. |
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Sensor Inspection
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| • | Test for an intermittent FRP sensor signal by wiggling the harness between the sensor and the engine control module (ECM) with the ignition ON and the engine OFF, while monitoring the parameter with a scan tool. |
| • | Observe the Actual Fuel Rail Pressure and the Desired Fuel Rail Pressure parameters. If the pressure difference is more than 2 MPa, a fuel control issue may exist. |
| • | Inspect the CKP sensor reluctor wheel. Remove the CKP sensor and attempt to move the reluctor wheel front to back or side to side with a probe. If there is any movement the reluctor wheel retaining bolts are loose. |
| • | Observe that the barometric (BARO) and manifold absolute pressure (MAP) sensors are within 5 kPa of each other. Refer to
DTC P0106
. |
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Additional Inspection
|
| • | Review the service bulletins for control module software updates. |
| • | Compare the scan tool data at idle with the scan tool data list. Refer to
Scan Tool Data List
. |
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