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Throttle getting stuck, causing slight vibration on 2008 Toyota Corolla

I have a slight vibration when my my is idling. I was told that my throttle need cleaning that it was getting stuck. can you help me, by giving me some advice?

Asked by for the 2008 Toyota Corolla
Likely talking about throttle bore cleaning because coking buildup can cause too much air flow turbulence that can cause rougher idle.
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Likely talking about throttle bore cleaning because coking buildup can cause too much air flow turbulence that can cause rougher idle.