My car recently hold the rev for awhile before it back to normal. When I came to a stop, the Rev would drop to 1500-2000 and hold it here for couple seconds before it back to 900 idle. I know this is not normal. I never have this before. Is there anything I can resolve this? Thanks.

 

Can try the MAP whack (see the FAQ), or replacing the MAP. Otherwise, clean the throttle body and idle control valve. Should be DIY instructions to do that in the FAQ too.

 

Tried MAP whack and reset ECU. Stilll the same.

 

Try this https://www.s2ki.com/forums/index.php?showt...&#entry10624891