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FRS Idle Issue Resolved: Throttle Position Reset and RPM Adjustments
Identifying the Problem
At approximately 100,000 miles, my FRS developed an idling issue where it would idle abnormally low, similar to when sitting at a red light.
Diagnosing the Cause
As our FRS utilizes a Toyota ECM and drive-by-wire system similar to the Tundra, I suspected a potential throttle position reset was needed.
Throttle Position Reset
I performed a throttle position reset to restore the ECM's understanding of the throttle's idle position. This simple procedure involves disconnecting the battery, waiting a few minutes, and reconnecting it.
Adjusting RPMs
Adjusting the throttle settings allowed me to increase the park and neutral RPMs to a more desirable 900. This was accomplished by making adjustments to the throttle cable.
Brake Application Impact
Applying the brakes initially brought the RPMs down to the default in-gear idle speed of 550-600 RPM. However, after resetting the throttle position and adjusting the RPMs, the brakes no longer caused a significant drop in idling speed.
Conclusion
By performing a throttle position reset and adjusting the RPM settings, I was able to resolve the low idling issue on my FRS. These simple steps can improve the overall driving experience and prevent unnecessary wear and tear on the engine.
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