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Dj, ASE Certified Technician
Category: Toyota
Satisfied Customers: 1910
Experience:  ASE Master Tech, 30+ years in automotive repair.
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Idle is to gh, is around 1150 rpms, how can I lower it more?

Customer Question

Idle is to high, is around 1150 rpms, how can I lower it more? I close all the way the screw in throttle body, and nothing
Submitted: 1 year ago.
Category: Toyota
Expert:  Dj replied 1 year ago.

Hello and thank you for trusting us with your question. I'm DJ.

There is a fast idle circuit built into the throttle body. It works like a thermostat. When the coolant is cold, the valve opens up and allows more air to bypass the throttle butterfly. This raises the idle speed. When it heats up, it closes and brings the idle back down.

It's the most likely cause for this.

Let me see if I can find you a picture.

Expert:  Dj replied 1 year ago.

Scroll down a ways and you'll see how the valve works.

Normally it's just gummed up.