FAQ
6. Frequently Asked Questions
Q: My Hilux only idles high when it's cold. Is that normal?
A: Yes, a slightly higher idle speed when the engine is cold is normal. The engine needs a richer fuel mixture and a higher idle to warm up quickly. However, if the idle speed is excessively high or if it doesn't settle down after a few minutes, there may be an underlying problem.
Q: Could a dirty air filter cause a high idle?
A: While a dirty air filter primarily affects engine performance and fuel economy, it can indirectly contribute to a slightly higher idle. A restricted air filter can affect the air-fuel mixture and cause the engine to work harder, which may result in a slightly elevated idle speed. Replacing a clogged air filter is always a good idea for overall engine health.
Q: My check engine light is on, and my Hilux is idling high. What should I do?
A: If your check engine light is on, it's a clear indication that there's a problem with your engine. A high idle can be one of the symptoms. The best thing to do is to have the codes read by a mechanic or use a scan tool yourself. The codes will help pinpoint the source of the problem and guide you toward the appropriate repairs.
Q: Can using the wrong type of engine oil cause a high idle?
A: It's unlikely, but it is possible in rare instances. Using engine oil with a viscosity that's too high for your Hilux's engine, can create excessive drag. This can affect the engine's internal resistance and potentially cause it to need a higher idle speed to maintain smooth operation.
