Needing help to adjust fast idle only. Idle after few minutes warm up okay but start up idle races too much.
Thanks for any how to recommendations.

 

Year 2000-2005?

These have a secondary air pump to heat up the catalyst. It's perfectly normal for these cars to idle at 1500-2000RPM before they warm up. When the air pup cuts off, it returns to the ~1000RPM idle.

 

Thanks for the info. Myo6 is idling near 2000 rpm at start up. Using 5w30 Mobil 1 Guess I'm good to go?

 

Not sure on MY06. It lacks the air pump, but I would imagine it idling high to heat the catalyst is still done. Someone else would need to confirm, though.

 

I really did not notice that hi of idle on the my05 i had but this my06 is very noticeable. it had a hondata reflash before i purchased it. do you think this could contribute to the faster idle speed?

 

Maybe, but probably not.

If it's in the 2200RPM range for a few minutes after a cold start, that seems consistent with what S2000s do.

 

My 06 civic Si was DBW just like your S and it would always start at around 2k rpm and slowly creep back down. I just thought it was a Honda thing as a lot of other Hondas do that including my 02 S.