High idle after cleaning throttle body

This can be because of two different factors either you have a vacuum leak because the sealing gasket got damaged when you reassembled the throttle body back into the engine, here, or the engine's computer needs to relearn which can take a day or two. Here is a guide to help you check for leaks and how to replace the gasket for the throttle body in the diagrams below:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://youtu.be/Ui8zhMLp5EM

If everything checks out just drive the van for a few days and it should relearn the idle speed. Also are there any check engine lights on?

This guide can help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing


Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

Thank you. I will check for a vacuum leak. I doubt that it will reset. I've tried but will give it a shot. This van is one I'm trying to get back on the road. I'll get back to you with the results.

Also no check engine light.

Yes, it sounds like a vacuum leak or relearn, let me know.