I recently got a 93 integra ls. The engine seems to run fine when I first start it and drive it for a while. But, when the engine gets hot and I have driven for like 45 minutes or so the engines idle stays at 3000. This even happens when I drive for like 20 minutes then go to the store or something them come back. I dont know what to do anymore I am burning through gas like crazy can anybody help?

 

https://honda-tech.com/forums/acura-integra-6/%2A%2A%2A-how-%2A%2A%2A-clean-your-fitv-aka-fast-idle-thermo-valve-1564019/