Test Notes

Verify symptom is reported under normal driving conditions without excessive engine/vehicle load conditions.

NOTE: For applications with Linear Knock Sensor (4.0L SOHC, 5.4L, and 6.8L trucks), a lack of power may result when the vehicle is operated with a breakout box installed at the Powertrain Control Module (PCM). The Knock Sensor circuits are not shielded in the breakout box and Knock Sensor noise may be noticed by the PCM. If this happens spark timing will be retarded and a lack of power will result.