High Rev After High Load

CaptainJochem

Respected
Hey all,

I'm still quite new to the forums here and I really would love to give some of my own feedback to you guys, but for now I have a small annoyance. I have noticed in my Civic that whenever I put the car on high loads, say revving past 4000+ RPM, that my car likes to idle high. I'll put it in neutral and the idle will stay at around 3000RPM. Then when I rev the engine really high again the idle returns to normal. I have heard from somewhere that this can be caused by air trapped in the cooling system. I'm going to bleed the coolant now but what do you guys think?

Thank you very much in advance!
 


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