Introduction
This document addresses the issue of a high engine idle speed during cold starts in a vehicle. It outlines possible causes and troubleshooting steps.
Problem
The engine idles at approximately 1500 RPM upon a cold start and takes an extended period (around 10 minutes of driving) to gradually decrease to the normal idle speed of 800 RPM. This behavior was not present previously.
Possible Causes & Observations
- Normal Cold Start Behavior: A slightly elevated idle speed during cold starts is typical. Some users report idle speeds of around 1200 RPM, dropping after a few minutes of driving.
- Idle-Up System: Some vehicles have an idle-up system. Ensure that if your vehicle has one, it is not engaged, although if this was the case the idle speed would likely remain high irrespective of engine temperature.
Solution
- No specific solution was identified. Some users reported the behavior to be normal.
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