People have asked me if they really need a throttle body service. I have touched on this subject in past articles but today I will go a little more in-depth. In my opinion dealership service departments and auto repair centers are recommending this service way too much. When I took my car in for the Cadillac recall the service adviser told me I needed one.
When I got home I removed the air intake hose and shined a flashlight into the throttle body. It was perfectly clean and almost shiny. It most certainly did not need to be serviced and cleaned. This is not to say that a throttle body service is never needed in fact I do believe they should be done as required.
This would mean a visual inspection to verify it is needed. Therefore if someone recommends this service to you I would ask them why do I need it. If they tell you, because it’s dirty I would then ask them how they know.
The correct answer to this question is they removed the air intake hose and performed a visual inspection. Or they scanned the vehicle and monitored the IAC (Idle air control motor) steps at base idle. If they did not do this I would not purchase the service or at least seek out a second opinion.